IRONMAN 70.3 Campeche

Arrive with calm, consistent tempo for the first few minutes—your goal is smooth acceleration, not a sprint. Based on the 1,943 m distance, get into your rhythm quickly: settle your breathing, find clean sighting early, and keep your effort controlled for the middle of the swim. If seeding is available, place yourself based on your recent 1.9 km/70.3 swim time so you’re not fighting faster swimmers in the first stretch.

You’ll swim 1,943 m in water reported around 28.3°C, where conditions are possibly non-wetsuit; treat it as a “springboard” swim—steady effort early and avoid going too hard before you’re warmed through. With warm air (22.4–30°C range) and a light NE breeze (4.6 m/s), expect that race-day wind may slightly influence surface conditions and sighting; keep your head position consistent and use frequent, calm forward sight checks. Fueling during the swim isn’t about taking in calories—focus on hydration readiness and make the transition your first “nutrition action point” (grab what you need quickly and cleanly). Swim effort should feel sustainable: build through the early-middle, then hold form into the final portion so you can exit controlled and accelerate into the bike.

In T1, move efficiently: exit the water without extra standing time, get into shoes smoothly, and secure helmet, sunglasses, and nutrition before you fully settle. Your first bike minutes should be about organizing your systems: start pedaling easy, confirm your fueling bottle access, and begin your planned cadence/effort before you push. If the course is flat/fast, you’ll feel pressure to go hard early—use the first section to lock in a steady power/effort and stabilize your breathing.

The bike is 90.2 km with 191 m of elevation gain on a flat/fast profile, so the key risk is going out too hard when it feels easy. With hot conditions and a NE wind around 4.6 m/s, expect that you’ll get wind effects you can feel even when the route seems straightforward—stay aerodynamic and smooth on the exposed sections, and avoid surging on any slight headwind/tailwind changes. Use your fueling targets from the start and keep them consistent: 90 g carbs per hour with 1,000 mg sodium and about 800 ml fluid per hour. Prioritize consistency over “catching up”—if you fall behind, it’s harder to recover on a flat course than on rolling terrain because your pace may remain deceptively smooth. Take in fluids proactively (not only when thirsty), since heat (22.4–30°C) can sneak up on you and reduce late-race tolerance.

In T2, think “legs first, speed later.” Off the bike on a flat/fast 21.7 km run (19 m gain), your first focus is turnover and comfort: bring your heart rate down just enough to find rhythm, then gradually increase. Set yourself up to start fueling early and regularly; the run is where hot conditions become a performance limiter, so you want hydration and electrolytes working immediately.

You’ll run 21.7 km on a flat/fast profile with only 19 m elevation gain, so pacing discipline matters more than hills. With air temperatures in the 22.4–30°C range and a light NE breeze (4.6 m/s), plan for heat management: aim for steady effort rather than big surges, especially in the early miles when you feel “good.” Keep fueling on schedule—your provided targets are 90 g carbs per hour, 1,000 mg sodium, and 800 ml fluid per hour—split intake across the aid stations so it feels routine rather than rushed. Focus on hydration timing: take fluids even when you’re not desperate, because you’ll cool the body less as the race heats up. Watch for signs of overheating—cooling (water on skin when available, slower pacing, and consistent intake) can protect your final third.