IRONMAN 70.3 Vichy

Set up for a smooth first 200–300 m: aim to be calm and find clear sightlines early, since freshwater temperature can vary. If the start is crowded, use controlled effort on the feet—no sprinting for position—then settle into a steady stroke cadence. During your first few minutes, prioritize breathing rhythm and staying long in the water rather than chasing speed. In T1, plan a quick, practiced flow: exit efficiently, grab your timing chip/gear as directed, rack the bike cleanly, and move through the transition without rushing so you don’t waste energy later.

You’ll swim 1902 m in freshwater where temperature varies, so manage your effort with a controlled start and get into your target pace once the field stretches out. With the outdoor conditions trending hot, don’t “overheat” early—keep strokes efficient and breathing consistent, especially through any chop the breeze creates. Focus on sighting and holding a line; wasted kicks and sideline swimming add up quickly at this distance. Fueling during the swim isn’t the goal—save your carbs and sodium for the bike and run where you can absorb and maintain pace; practice staying relaxed to help you transition smoothly.

Your T1 is about getting moving while staying controlled: dismount on time, rack smoothly, and then start with a short, steady spin to fully “wake up” the legs before you push. I like to run through a tight routine—helmet on, glasses secured, bottles/cans set for the first intake—so you can start fueling immediately. With a rolling 89.8 km course, avoid standing starts or surges right away; let the terrain teach your power curve.

The 89.8 km bike is rolling with 751 m of elevation gain, so expect repeated transitions between slightly harder and slightly easier sections—your job is to stay consistent rather than spike power on every hill. With wind around 3.6 m/s from the NW and hot air, you’ll likely feel more resistance when you’re riding into it and less on the returns; use that to modulate effort and keep cadence stable. Because conditions are hot, fuel early and often: target 90 g carbs per hour and about 1000 mg sodium per hour, plus fluids aiming for up to 800 ml per hour to match what you’re comfortable taking. Make hydration “planned,” not reactive—sip regularly, and adjust if you’re sweating heavily; the goal is to finish the bike feeling like you can run, not like you’re dehydrated or overcooked. Watch for cumulative fatigue on the later rollers—keep your technique quiet, don’t let the bike get too heavy in the bottom of hills, and avoid gear choices that spike strain.

In T2, your focus is getting the legs to turn over quickly without forcing pace. Off the bike on a flat/fast 20.9 km, the temptation is to go out strong—resist for the first few minutes and let your stride settle. Aim for a smooth ramp: light feet, controlled breathing, and posture tall so you don’t waste energy while you transition from bike power to running rhythm. Start executing your run hydration and intake plan early, because the air is hot.

The 20.9 km run is flat/fast with only 68 m elevation gain, so your limiter is less terrain and more heat management and how you survived the bike. With air temperatures ranging up to the high end (14.9–27 C) and hot conditions, keep your effort controlled early and trust that you can build slightly once your body stabilizes. Wind can still influence how “comfortable” it feels—when it’s in your face, keep form compact and cadence steady rather than reaching for speed. Keep fueling strategy consistent with the race’s targets: carbs 90 g per hour and sodium 1000 mg per hour, along with fluid intake aligned with up to 800 ml per hour—sip frequently so you don’t chase thirst late. If you feel yourself slowing before you’ve taken your planned intake, take the next opportunity to correct: small, regular corrections beat big catch-up sprints.