The 70.3 triathlon is a big step up from sprint and Olympic distance. With 1.9 km of swimming, 90 km on the bike and a half marathon to finish, it needs more planning than just adding a few extra sessions.
A 70.3 triathlon coach helps you turn that distance into a clear, realistic plan. Instead of guessing weekly volume and race pace, you work toward your target with structure, feedback and smart recovery.
Through Good Coach App your coach can plan your swim, bike and run, see what you actually complete and adjust your blocks around work, family and travel.
Why work with a coach for 70.3 triathlon
Half distance triathlons are long enough that small mistakes add up. A coach can help you:
- Choose the right 70.3 race and set a realistic goal time
- Build from your current fitness without jumping straight to long bricks
- Balance intensity and volume so you arrive fit, not burned out
- Practice pacing, fueling and hydration specific to race day
- Manage niggles, illness or busy weeks without losing the full block
This support is useful whether your goal is simply to finish your first 70.3 or to qualify for bigger races.
What a good 70.3 training plan includes
A well built 70.3 plan is more than long sessions at the weekend. It usually covers:
- Swim
Technique work, open water skills and race pace sets that build confidence for a 1.9 km start, without leaving you too tired for the rest of the week.
- Bike
Aerobic endurance rides, tempo and sweet spot sessions, plus race simulation rides that include fueling practice and some time in race position.
- Run
Easy runs, specific race pace blocks and carefully timed long runs so you can handle a half marathon after 90 km on the bike.
- Bricks
Short and long swim to bike and bike to run bricks to get used to transitions and running on tired legs.
- Strength and mobility
Simple strength work for core, hips and shoulders, and mobility sessions to keep you healthy across the whole block.
All of these sessions can sit in your Good Coach App calendar, with clear notes and pace or power targets. As you sync data from your watch or bike computer, your coach can see how you respond and refine the next week.
Training for any 70.3 brand or independent race
This style of coaching works for:
- Official Ironman 70.3 events
- Challenge and other branded 70.3 races
- Local half distance triathlons with similar swim, bike and run lengths
Your coach will adjust the plan to match your race course. For example, more climb focused bike sessions and hill runs for hilly routes, or extra open water practice for sea swims with waves and currents.
Example 70.3 training focus by athlete type
The same distance can look very different for each athlete.
First time 70.3 finisher
Focus on consistent weeks, building confidence in open water, hitting key long rides and long runs and practicing basic nutrition. Pace is secondary to finishing strong and enjoying the day.
Time goal athlete
More precise work around threshold and tempo on bike and run, clear power and pace targets, refined race nutrition and more specific bricks to test pacing and fueling under fatigue.
Stepping up to full distance later
Balanced plan that respects the half distance race, while also laying foundations for a future full distance block. That often means better habits around strength, recovery and nutrition rather than simply adding more hours.
Your coach can map these goals into clear phases inside the app so you always know what the focus is this month and this week.
How online 70.3 coaching works day to day
Working with a 70.3 coach online usually follows a simple pattern:
- You share your race date, course, past results and current weekly hours.
- Your coach sets up a realistic plan in your calendar with swim, bike, run, brick and strength sessions.
- You sync your data from Garmin, COROS, Suunto or other devices, or log workouts by hand.
- You use comments and chat to share how sessions felt, including fatigue, sleep and stress.
- Your coach reviews the data and your notes, then tweaks the next weeks load, intensity and key sessions.
Everything stays in one place instead of spreading across spreadsheets, chats and separate apps.
Online triathlon coaches for 70.3 distance
Here are some coaches who work with half distance athletes and coach online through Good Coach App:
Next steps …
If you already have a 70.3 race in mind, you can:
- Pick a coach and share your race date, course and current training
- Start with a simple goal, for example finishing comfortably or targeting a certain range like under 6 or under 5 hours
- Build from where you are now instead of copying a generic half distance plan
With a clear plan, steady feedback and one place for all your sessions and data, the 70.3 distance becomes a structured project rather than a vague long race on the calendar.






