IRONMAN 70.3 Wisconsin

Arrive early enough to warm up your shoulders and hips with a few easy pool/edge lengths (or dynamic mobility if you didn’t swim much). At the start, seed to your realistic swim pace and position yourself so you’re not constantly fighting for clean water. In the first few minutes, settle your breathing, keep strokes smooth, and avoid sprinting off the blocks—your goal is to swim controlled through traffic and hit your target effort before the body fatigue shows up.

You’re swimming 1983 m in freshwater where the temperature can vary, so start slightly conservative and let your body tell you when to firm up. Expect some chop and buoyancy changes depending on conditions; keep your head position steady and prioritize long, efficient strokes over forcing speed. With air temps typically spanning roughly 14.3–23.8°C and moderate heat overall, don’t mistake a cooler start for needing to go harder—stay consistent with your effort and breathing. Fueling-wise, rely on what you can during the bike and run; for most athletes the swim is about staying calm, not trying to take in meaningful carbs or fluids.

Plan a fast, orderly transition: have your bike gear laid out so you can go from wetsuit/swim gear to helmet/shoes without extra hesitation. After the swim exit, take a moment to get your bearings, hydrate enough to feel settled, and then mount smoothly with a controlled first minute—this is where you set the tone for the rolling course. Expect to feel fresh off the swim; resist the urge to ‘start hard’ and instead ramp into your sustainable power before the terrain turns you into a limit.

Ride 86.5 km with rolling terrain and 449 m of elevation gain, so your best strategy is to ride the climbs with restraint and use the downhills to recover without surging. With wind reported at about 4.5 m/s from the S, anticipate that headwinds will show up on exposed sections and push/pull on other stretches—stay aerodynamic, keep your effort smooth, and avoid cooking yourself on the first strong wind moments. Use your fueling targets from the start of the bike: aim for 90 g carbs per hour, 750 mg sodium per hour, and about 650 ml fluid per hour, adjusting slightly if you’re thirstier or running low early. On a rolling profile, take fuel on the flats/less-demanding segments and stay consistent through the entire ride rather than “making up” later.

At T2 (bike to run), prioritize getting your balance and cadence back fast: loosen your grip, start easy for the first few minutes, and focus on smooth footstrike rather than pushing the pace immediately. The legs typically feel heavy at first on a flat/fast 21.5 km run after 86.5 km of rolling bike work, so plan to ‘find’ your rhythm instead of forcing speed. Have any last sips of fluid ready before you settle into your run effort.

You’ll run 21.5 km with a low elevation demand (55 m gain) and a flatter, faster feel than the bike—so the risk becomes going out too hot and fading later. With moderate heat and air temperatures typically around 14.3–23.8°C, manage your pace by effort first: if it feels easy at the start, you’re doing it right; if it feels urgent, slow down. Keep fueling on schedule from the bike so your run doesn’t run out of steam—continue carbs and fluids at your established race targets rather than pausing too long. Because the course is flatter, you may feel stronger after the first hour-markers; use that to maintain steady effort and posture, and don’t let minor discomfort trigger a sprint-and-recover pattern.