Master Your First Half Ironman in 20 Weeks

Nearly five months of structured training separates you from your half Ironman finish line. That’s exactly what a complete 20-week training plan demands – but don’t worry, you’re not alone in feeling overwhelmed by that timeline.

This beginner-focused approach is specifically designed for first-time participants who want sufficient preparation for a successful finish. The structure breaks down into three distinct phases: 8 weeks for base building, 6 weeks for intensity development, and 6 weeks for race-specific preparation.

Week one starts manageable. You’ll tackle 3,900 yards of swimming, 2 hours and 45 minutes of cycling, and 1 hour and 45 minutes of running. Fast-forward to week 17, and you’ll peak at 6,700 yards of swimming, 5 hours and 20 minutes of cycling, and 3 hours and 7 minutes of running. This gradual progression prevents burnout while systematically building the endurance you need.

The plan’s beauty lies in its predictable rhythm. Most weeks include three swims, three rides, and three runs. Every fourth week becomes your recovery week – a strategic break that allows your body to absorb the training stress and emerge stronger.

Have you ever wondered if you can actually finish 70.3 miles of swimming, biking, and running? This proven 20-week structure will build both your physical capacity and mental confidence, one workout at a time.

How to Use This 20-Week Beginner Half Ironman Training Plan

Success in half Ironman training depends more on smart implementation than perfect execution. This structured approach provides guidance while maintaining the flexibility you need to balance training with real life.

Who should follow this plan

Athletes who follow structured training plans are twice as likely to reach their endurance goals compared to those who create workouts randomly. This specific plan targets first-time half Ironman participants who want sufficient preparation for a successful finish.

You’ll benefit most from this plan if you:

• Have some recent background in fitness or sport
• Can already swim 1km, cycle for 90 minutes, and run for 1 hour
• Can commit to at least 6 hours of weekly training, though 10 hours is preferable
• Don’t feel the need for a personal coach but want structure
• Are starting with base fitness but need a gradual progression

Remember that fitness adaptations require time – your body needs weeks and months, not days, to develop the cardiovascular and muscular changes necessary for endurance performance. That’s exactly why this plan spans 20 weeks.

How to track your progress

Data becomes your training partner throughout these 20 weeks. Setting up a tracking system now helps you identify patterns, spot what works, and make smart adjustments when needed.

Heart rate monitors, power meters, and GPS devices reveal improvement trends over time. Choose your tracking method based on your preferences:

1. Basic tracking: Simple notebook, Excel spreadsheet, or Google Doc to log workouts, perceived effort, distance, and time.
2. Training software: Programs like TrainingPeaks monitor critical metrics such as Chronic Training Load (CTL) and Training Stress Score (TSS) – essential for proper progression. Target a race-day TSS of 300-400 for half Ironman distance.
3. Social tracking: Platforms like Strava combine social interaction with basic analysis, boosting motivation through friendly competition.

Consistency matters more than complexity. This data becomes invaluable for reviewing performance patterns and making necessary training adjustments.

Many athletes prefer physical copies for quick daily reference and long-term visualization. This 20-week structure follows a proven pattern:

• Three weeks of progressive training load followed by one recovery week
• Volume increases gradually as your fitness improves
• Peak training in week 17: 6,700 yards swimming, 5 hours 20 minutes cycling, 3 hours 7 minutes running

Take detailed notes on nutrition and hydration throughout your training. Document what works (and what doesn’t) during day-to-day sessions and around workout timing. This information forms the foundation of your race day nutrition strategy.

Test every piece of race gear during training – goggles, tri suit, nutrition products, everything. Race day brings enough surprises without adding untested equipment to the mix.

Consistency remains the cornerstone of half Ironman success. Following this 20-week plan while tracking your progress builds both physical capacity and mental confidence for your first 70.3 race.

Weekly Training Structure Explained

Juggling nine weekly workouts sounds overwhelming until you see the pattern. Most triathletes worry about fitting everything in – but this weekly structure removes the guesswork from your training schedule.

Swim, bike, run frequency

Your typical training week includes 9 workouts spread across all three disciplines. You’ll complete 3 swims, 3 bike rides, and 3 runs each week. This balanced approach ensures steady development in all three sports without overwhelming any single discipline.

Some weeks mix things up with brick workouts – those challenging back-to-back sessions that simulate race conditions. Picture finishing a 2-hour bike ride and immediately lacing up your running shoes. These combination workouts prepare your legs for the unique challenge of running on bike-fatigued muscles.

Time allocation matters more than you might think. Cycling demands the most training hours since it represents the longest race segment. A typical 10-hour training week breaks down like this: 3 hours swimming, 5 hours biking, and 2 hours running. Your personal weaknesses should guide these numbers though. Struggling with cycling? Consider 6 hours on the bike while reducing swim time to 2 hours.

Rest and recovery days

Every training week includes at least one complete rest day. Your muscles, hormones, and nervous system need time to recover from accumulated training stress. Skip recovery, and your long-term progress suffers.

The plan includes three types of recovery days:

1. Complete rest days – Zero training, just gentle stretching and self-care
2. Leg rest days – Swimming only, perfect after demanding weekends
3. Active recovery days – Easy movement that promotes blood flow

Recovery weeks appear every fourth week with 20-30% volume reduction. These strategic breaks allow your body to absorb training stress and adapt. Sleep and complete rest become your priorities during these crucial weeks.

Watch for warning signs: elevated resting heart rate, mood changes, sleep disruption, unusual hunger for sweets, and persistent minor injuries. These signals mean your body needs extra recovery time.

How to adjust based on your schedule

Real life interferes with perfect training schedules. Work deadlines, family commitments, and social obligations all compete for your time. The good news? This plan adapts.

Training for a half Ironman typically requires 8-13 hours weekly. Can’t commit that much time? Extend your plan beyond 20 weeks to allow for smaller weekly volumes.

Tuesday, Wednesday, and Thursday work well as intensive training days. Schedule easier, shorter sessions on Mondays and Fridays. This pattern lets you recover from weekend training while preparing for upcoming challenging days.

Remember the minimum: two sessions per discipline weekly (two swims, two bikes, two runs) keeps you progressing, though three sessions per discipline works better. Advanced athletes might handle four sessions per discipline.

Consistency trumps perfection. Even if you adjust individual workouts, staying committed to the overall weekly structure delivers results on race day.

Workout Types You’ll Be Doing

Miles alone won’t get you across the half Ironman finish line. Training effectiveness comes from understanding why each workout matters in your development as a triathlete. Four distinct workout types form the backbone of your 20-week journey, each targeting specific physiological adaptations essential for race day success.

Endurance workouts

Endurance sessions build your aerobic engine – the foundation that powers every stroke, pedal revolution, and stride. These longer, steady-state workouts teach your body to burn fat efficiently while maintaining a conversational pace. Think of them as your aerobic base camp.

Swimming endurance gradually progresses from 1,500 yards to 2,500+ yards with minimal rest between sets. Technique maintenance becomes crucial as fatigue sets in – sloppy form at the end of these sessions translates directly to wasted energy on race day.

Cycling endurance rides start around 60-90 minutes during your base phase and extend to 3-4 hours at peak training. These rides should feel comfortable – resist the urge to hammer. You’re building endurance, not testing your fitness.

Running endurance begins with 30-45 minute sessions and peaks at 1:45-2:00 hours before tapering. Maintain a pace roughly 60-90 seconds slower than your goal race pace. This controlled effort reduces injury risk while systematically building the stamina you need.

Interval sessions

Interval training introduces controlled intensity to raise your lactate threshold and VO2 max. These sessions alternate between challenging efforts and recovery periods – think of them as your speed laboratory.

Swimming intervals might feature 10×100 yards with 15 seconds rest, focusing on consistent pacing throughout. As your fitness improves, intervals become shorter with reduced recovery time.

Cycling intervals range from longer threshold efforts (5-8 minutes) to shorter, more intense bursts (1-2 minutes). A typical session includes 6×5 minutes at 85-90% of your maximum heart rate with 3 minutes recovery between efforts.

Running intervals typically occur once weekly – efforts like 8x400m or 5x800m at 5K race pace with walking or jogging recovery. These sessions build speed while training your body to recover quickly between efforts.

Tempo and threshold training

Tempo workouts occupy that challenging middle ground – not easy enough for conversation, yet sustainable for 20-40 minutes. These sessions train your body to process lactate more efficiently, essentially raising your “comfortably hard” ceiling.

Swimming tempo involves sustained efforts at 85-90% of maximum effort, such as 3×500 yards with brief rest periods. Consistent pacing throughout each repetition becomes your primary focus.

Cycling threshold sessions might include 2×20 minutes at 75-85% of your maximum heart rate with 5 minutes easy spinning between efforts. These workouts significantly boost your sustainable race-day power output.

Running tempo typically lasts 20-40 minutes at a pace you could maintain for about an hour – approximately 10-20 seconds per mile slower than your 10K pace. These controlled yet challenging efforts build mental toughness alongside physical capability.

Transition runs

Transition runs prepare you for one of triathlon’s unique challenges – running on bike-fatigued legs. After completing a cycling workout, you immediately switch to running, just as race day demands.

Early in your training, these runs might last just 10-15 minutes following a bike session. Distance matters less than adaptation – your neuromuscular system needs to learn efficient running despite cycling fatigue.

These sessions extend to 30-45 minutes off the bike as your training progresses. A key transition workout during peak training might include a 2-hour ride followed immediately by a 45-minute run at goal half marathon pace.

Include at least one transition workout weekly during your build and peak phases. These sessions provide crucial mental confidence – knowing you can run effectively after hours on the bike becomes invaluable when race day arrives.

Each workout type serves a specific purpose in creating the complete triathlete. Understanding why you’re doing each session allows you to approach training with intention, maximizing the effectiveness of every swim, bike, and run throughout your 20-week journey.

The Importance of Recovery Weeks

Many first-time half Ironman athletes make the same critical mistake – they think more training always equals better results. The truth? Your body gets stronger during rest, not during workouts.

Recovery weeks serve as strategic reset periods that allow your muscles to repair, your energy stores to replenish, and your cardiovascular system to adapt. Without these planned breaks, you’re building fitness on a foundation of accumulated fatigue that will eventually crumble.

When they occur in the plan

Recovery weeks appear every 3-4 weeks throughout your 20-week half ironman training plan. Picture this pattern: three weeks of progressively harder training followed by one week where you pull back and let your body catch up. This rhythm becomes especially important during the build and peak phases when your training loads reach their highest levels.

The magic number? Reduce your overall training volume by approximately 30% compared to your previous week. This isn’t about being lazy – it’s about giving your body permission to absorb all the hard work you’ve been putting in.

Your 20-week plan includes five recovery weeks strategically placed after each three-week training block. Research shows that accumulated fatigue begins to significantly impact performance after three consecutive weeks of intense training. Think of these recovery weeks as scheduled maintenance for your body.

How to maximize recovery

Simply doing less isn’t enough. Maximizing recovery requires intention.

During recovery weeks, add extra rest days. While normal training weeks include one complete rest day, recovery weeks should feature at least two days with zero training. These complete breaks allow your muscles to rebuild more effectively.

Here’s where many athletes sabotage themselves: they push too hard during “easy” recovery sessions. Keep your remaining workouts genuinely easy – primarily zone 1 heart rate, power, or perceived exertion.

Active recovery beats complete inactivity. Try a gentle 20-minute swim or easy bike spin without any pressure about pace or distance. The goal is moving blood through your muscles without adding training stress.

Recovery demands proper fuel. Don’t restrict calories during these weeks. Your body needs resources to rebuild stronger. Prioritize sleep as your nervous system calms and regeneration accelerates overnight.

Signs you need extra rest

Sometimes your body demands additional recovery beyond the scheduled weeks. Watch for these warning signals:

• Performance declining across three consecutive workouts
• Elevated resting heart rate and disrupted sleep patterns
• Muscle soreness that lingers beyond 24-48 hours
• Decreased motivation and unusual irritability
• Workouts feeling harder than they should

Remember this: proper recovery isn’t weakness – it’s intelligent training. Without scheduled recovery weeks, the training load catches up fast. The longer your training blocks and higher your weekly volume, the more valuable these breaks become.

Real strength in half ironman training isn’t pushing through exhaustion – it’s knowing when to step back and let your body absorb the work you’ve already completed. This strategic approach ultimately delivers stronger performance on race day.

How to Progress Through the Phases

Many first-time half Ironman athletes make the mistake of jumping into intense training too quickly. Your body needs time to adapt—attempting to build speed before establishing an aerobic foundation often leads to injury or burnout.

Your 20-week journey unfolds through three distinct phases, each serving a specific purpose in transforming you from beginner to race-ready athlete. Understanding these phases helps you train with intention rather than just logging hours.

Base phase goals

The initial 8 weeks focus entirely on building your aerobic engine. Think of this as constructing the foundation of a house—without it, everything else crumbles.

Most workouts during this phase happen at conversational intensity (Zones 1 and 2). This might feel too easy, but these moderate efforts trigger crucial physiological adaptations: increased heart stroke volume, improved capillary density, and greater mitochondrial density. These changes enhance oxygen delivery and utilization—the cornerstone of endurance performance.

Your primary objectives include:

• Building cardiovascular fitness and endurance
• Training your central nervous system
• Developing triathlon-specific strength

The base phase requires patience. Effective plans allocate 8-12 weeks to this foundation building, allowing gradual volume increases without overwhelming your system. Use this lower-intensity period to refine technique across all three disciplines—form improvements made now deliver free speed without additional fitness demands.

Remember: consistency during these early weeks often predicts race-day success more accurately than any other factor. The momentum you establish here carries through your entire training cycle.

Build phase intensity

The 6-week build phase introduces the intensity your body can now handle. Having established your aerobic base, you’re ready for challenging high-intensity workouts—lactate intervals across all three disciplines. Incorporating lactate threshold testing protocols will help you pinpoint your individual thresholds and tailor your training sessions accordingly. This targeted approach ensures that you maximize your performance while minimizing the risk of overtraining. As you progress, these testing protocols will serve as valuable benchmarks to track improvements and adapt your training plan effectively.

Your training now incorporates threshold and tempo work. These sessions enhance your ability to sustain faster speeds while continuing to build endurance through long workouts and brick sessions. The build phase develops the powerful musculature needed for strong race finishes.

Bike sessions now blend low-cadence strength work with harder intensity efforts. Running off the bike becomes more frequent to simulate race conditions, though maintaining appropriate pacing remains crucial. Resist the temptation to run too fast after cycling—a common mistake that derails training progress.

Expect muscle soreness and increased fatigue during this phase. Proper nutrition, adequate sleep, and occasional massage become essential for managing recovery between demanding workouts.

Peak phase race simulation

The final 6 weeks transition you into race-specific preparation. Weekend workouts extend substantially to ensure you can complete the full race distance. Threshold training across all disciplines takes priority alongside race simulation workouts.

Race simulations serve as dress rehearsals. You’ll practice pacing, nutrition, and equipment choices under conditions that mirror race day. Many plans include an optional sprint or Olympic distance practice race approximately three weeks before your event.

Brick workouts become increasingly important. Weekend sessions should be completed back-to-back to replicate race demands—these build confidence in your ability to maintain performance across transitions.

The peak phase culminates in a proper taper—a 2-3 week period of planned volume reduction. This strategic decrease allows your body to shed accumulated fatigue while maintaining fitness, ensuring you arrive at the start line fresh and ready.

Each phase builds upon the previous one. Your base creates the platform, build adds the intensity, and peak fine-tunes everything for race day success.

Nutrition Tips for Training and Race Day

Proper nutrition can make the difference between crossing the finish line strong or hitting the wall at mile 10 of the run. Even the most perfectly executed training plan falls apart without adequate fueling and hydration strategies.

What to eat before, during, and after workouts

Morning workouts demand careful timing. Eat a light meal 1-3 hours before training – think oatmeal with fruit or toast with nut butter for quick energy without digestive issues. Training at 5 AM? Try a small “first breakfast” like half a banana, then fuel properly after your session.

On the bike, target 60-90g of carbohydrates per hour from multiple sources – glucose, fructose, and maltodextrin combinations work best. This variety reduces gastrointestinal distress by using different absorption pathways. Experienced athletes handling rides exceeding 2 hours might push this to 90-120g hourly.

Running changes everything. Your stomach becomes increasingly sensitive, so simplify to 30-60g of carbs hourly through easily digestible gels or sports drinks. Many triathletes make the mistake of trying to match their bike nutrition during the run – don’t.

Post-workout recovery starts immediately. Consume 20-30g of protein within 30 minutes to kickstart muscle repair. Pair this with carbohydrates at a 3:1 or 4:1 ratio (60-120g carbs to 20-30g protein) for effective glycogen replenishment. Follow up with a substantial meal within 90 minutes.

Hydration strategies

A mere 2% drop in body weight from dehydration kills performance and causes early fatigue. You need a personalized hydration plan based on your specific sweat rate.

Calculate your sweat rate: weigh yourself before a one-hour workout, track fluid consumed, then weigh again afterward. Weight loss (in ounces) plus fluid consumed (in ounces) equals your hourly sweat rate.

Pre-loading with electrolytes boosts performance significantly. Drink a strong electrolyte solution (containing at least 1,000mg sodium per liter) with 500ml water the evening before and again a few hours before starting. Stop drinking at least 45 minutes before your start time for proper absorption.

During exercise, target 500-1000ml fluid hourly with sodium concentration between 500-1500mg per liter, depending on your individual sweat sodium content. Unsure of your levels? Aim for approximately 1000mg sodium per liter.

Testing your race day nutrition

Your gut adapts through training – the more you practice your race-day strategy, the better your body handles it under pressure. Test your nutrition plan during:

• Long rides with race-pace segments
• Brick workouts, especially bike-to-run transitions
• Full race simulation days

Never experiment on race day. Document everything that works (and doesn’t work) during day-to-day training – what you eat before, during, and after workouts. This documentation becomes your race day blueprint.

Remember: nutrition strategy matters as much as physical training for half Ironman success. Smart athletes individualize their plans through experience, testing, and learning from each training session. This methodical approach maximizes both your training effectiveness and race day performance.

Essential Gear and How to Use It

The right equipment can make or break your half Ironman experience. Quality gear enhances performance while preventing the kind of race-day disasters that turn months of training into frustrating memories.

Swim gear basics

Your wetsuit choice impacts more than just warmth—properly fitted sleeves deliver measurable speed advantages without restricting shoulder mobility. Goggles require redundancy. Keep both clear lenses for overcast conditions and tinted lenses for sunny race days in your transition bag.

Pull buoys simulate the natural buoyancy you’ll experience in salt water or while wearing a wetsuit. This training tool helps you focus on stroke technique without worrying about sinking legs. Swim caps serve dual purposes—hair protection and warmth retention, plus race directors mandate them on race day.

Open-water training demands anti-chafe lubricant around your neck and armpits. That repetitive wetsuit friction over 70-90 minutes creates painful raw spots that can ruin your entire race experience.

Bike setup and maintenance

Triathlon-specific bikes provide aerodynamic positioning that saves your hamstrings for the run. Road bikes offer versatile handling characteristics, while tri bikes feature forward-leaning geometry designed to slice through wind resistance.

Maintenance prevents mechanical failures that end races prematurely. Weekly tire inspections reveal cuts or excessive wear before they cause flats. Check brake function before every ride, and examine wheel skewer tightness regularly. Monthly drivetrain cleaning and lubrication ensures smooth shifting and pedaling efficiency.

Essential accessories include a properly fitted helmet, dual hydration systems with frame bottles and aerobars bottles, plus cycling shoes with cleats for optimal power transfer. Frame bags store nutrition essentials during longer training rides.

Running shoes and tri suits

Running shoes require replacement every 300-500 miles—track your mileage religiously. Select shoes with substantial cushioning, ideally featuring at least 30mm heel height to support tired legs during the final miles.

Your tri suit represents one of the most critical gear investments. Half Ironman distances demand specific features:

• Comfortable chamois padding for extended cycling segments
• Minimal seaming to prevent chafing across 70.3 miles
• Adequate pocket space for race nutrition storage
• Quick-drying, breathable fabric construction

Short-sleeved tri suits can save approximately one minute over 90km compared to sleeveless versions—a meaningful advantage for competitive athletes. Test every piece of equipment during training sessions. Race day brings enough variables without introducing untested gear.

Preparing for Race Day Success

Twenty weeks of training comes down to this moment. Race day preparation separates confident finishers from those who struggle through their final miles.

Tapering and mental prep

Your taper begins 2-3 weeks before race day with training volume reductions of 40-60% while maintaining some intensity. Keep race-pace intervals every 72 hours – think of it as keeping your engine warm without overheating it.

This period offers perfect timing for mental rehearsal. Visualize yourself moving smoothly through each transition, maintaining steady pacing during challenging segments, and crossing that finish line. Create personal mantras for tough moments – simple phrases that remind you why you started this journey.

Those pre-race butterflies? They’re not weakness – they’re proof this matters to you.

Race day checklist

Pack these essentials the night before:

• Photo ID and registration materials
• Timing chip (secure it to your left ankle)
• Tested race nutrition providing 60-90g carbs per hour
• Multiple goggle options for varying light conditions
• Race apparel you’ve worn during long training sessions

Arrive at the venue with at least one hour to spare. Complete your 10-15 minute warm-up roughly 45 minutes before your start time – enough to activate your systems without depleting energy reserves.

What to expect on the course

Aid stations follow a predictable rhythm. On the bike course, expect support every 12-15 miles, while run aid stations appear every 1.5 miles. Each station flows in the same pattern: water-electrolytes-food-gels-electrolytes-water-trash.

Watch for common penalty situations: littering outside designated zones, drafting too closely behind other cyclists, or touching your bike while your helmet remains unbuckled. Need medical attention? You can grab onto a kayak during the swim or request help at any aid station without automatic disqualification.

Remember – thousands have stood exactly where you stand now. Trust your training, execute your plan, and enjoy becoming a half Ironman finisher.

Conclusion

Twenty weeks of structured training transforms more than just your fitness – it reshapes how you see yourself as an athlete. Each early morning swim session, every challenging bike interval, and those tough transition runs have built something deeper than endurance. You’ve developed the mental toughness that separates finishers from dreamers.

The journey from that first manageable week to your peak training volume represents a remarkable transformation. Your body has adapted, your mind has strengthened, and your confidence has grown with each completed workout. Most importantly, you’ve learned to trust the process even when motivation wavered.

Standing at the starting line, remember this: thousands of training hours have prepared you for every challenge the course will present. That moment when your legs feel heavy during the run? You’ve practiced running on tired legs. The confusion of transition areas? You’ve rehearsed your routine countless times.

Your first half Ironman finish line represents more than completing 70.3 miles. You’ve joined a community of athletes who understand what it means to push beyond perceived limitations. The lessons learned – about persistence, preparation, and personal strength – extend far beyond triathlon.

Whether this becomes your only half Ironman or ignites a passion for longer distances, you’ve proven something invaluable. Structured training, consistent effort, and proper preparation can accomplish what once seemed impossible. That finish line medal represents months of dedication, early mornings, and the courage to attempt something extraordinary.

Don’t worry about your finishing time – focus on finishing strong.

Key Takeaways

Master your first Half Ironman with this comprehensive 20-week training plan that transforms beginners into confident finishers through structured progression and smart recovery.

• Follow the proven 20-week structure: 8-week base phase, 6-week build phase, and 6-week peak phase with recovery weeks every fourth week to prevent burnout while building endurance.

• Train consistently with 9 weekly workouts: Complete 3 swims, 3 bike rides, and 3 runs most weeks, totaling 8-13 hours of training time for optimal race preparation.

• Master four essential workout types: Endurance sessions build your aerobic base, intervals improve speed, tempo work raises your threshold, and transition runs prepare you for race-day leg fatigue.

• Prioritize recovery weeks for adaptation: Reduce training volume by 30% every fourth week to allow your body to absorb training stress and emerge stronger.

• Practice race-day nutrition religiously: Consume 60-90g carbs per hour on the bike, maintain proper hydration based on your sweat rate, and never try anything new on race day.

• Invest in proper gear and test everything: Quality wetsuit, well-fitted tri suit, reliable bike setup, and tested nutrition strategy are essential for comfort and performance during your 70.3-mile journey.

The key to Half Ironman success isn’t just physical fitness—it’s the combination of structured training, smart recovery, proper nutrition, and mental preparation that transforms dedicated beginners into confident finishers.

FAQs

Q1. How long should I train for my first half Ironman? A comprehensive training plan typically spans 20 weeks, divided into an 8-week base phase, 6-week build phase, and 6-week peak phase. This structure allows for gradual fitness improvements while minimizing injury risk.

Q2. What’s a realistic half Ironman completion time for beginners? For first-timers, finishing times vary widely, but many beginners aim to complete the 70.3-mile course in 6-8 hours. However, it’s important to focus on proper pacing and nutrition rather than a specific time goal for your first race.

Q3. How should I structure my training intensity? Follow the 80/20 rule – spend about 80% of your training time at low intensity (zones 1-2) and 20% at moderate to high intensity (zones 3-5). This approach optimizes endurance gains while reducing burnout risk.

Q4. What’s the most important aspect of half Ironman training? Consistency is key. Aim to complete 9 workouts most weeks – typically 3 swims, 3 bike rides, and 3 runs. Regular training, even if some sessions are shorter, is more beneficial than sporadic long workouts.

Q5. How can I prepare my nutrition strategy for race day? Practice your race-day nutrition during training, aiming for 60-90g of carbohydrates per hour on the bike and 30-60g per hour while running. Never try new foods or drinks on race day – stick to what you’ve tested in training.