IRONMAN 70.3 Switzerland

Arrive focused on positioning: get into your seeded start group, then use the first few minutes to settle your breathing and rhythm before you try to “move up.” Do a short warm-up in the water if it’s available, and if not, use the minutes before the start to mobilize shoulders and take controlled strokes at easy effort. On the start signal, expect traffic—hold your line early, avoid sprinting, and look for clean space after the first surge so you can lock into an efficient cadence.

You’re swimming 1,910 m in freshwater with temperature that varies, so start slightly conservative and let the effort build as you find the right feel. With a typical moderate conditions day, sighting will matter early—pick a consistent landmark strategy and only adjust your line in small corrections. Fueling is not a priority during the swim, but mentally plan your intake for the bike immediately after you stand up in T1 (you’ll feel steadier sooner if you keep your first steps controlled). If you feel cold in the water, don’t overreach early—shorten stroke length a touch, keep your kick smooth, and focus on steady breathing until you settle.

In T1, transition quickly but safely: after the swim, prioritize drying enough to get traction on wet feet and get your shoes on without rushing blindly. Keep your first pedal strokes smooth—your legs will feel stiff, and the first goal is to re-find cadence before you push power. As you mount, take 30–60 seconds to get your breathing and heart rate down from the swim surge, then ramp to your planned intensity.

This is an 85.2 km bike with 947 m of climbing and a hilly/climbing profile, so pacing is about smart effort control rather than holding one effort level. Expect the wind to come from the SW at around 3.3 m/s; that’s enough to affect comfort and steering, especially on exposed sections—stay relaxed, keep a steady line, and avoid over-correcting. Air temperatures range from roughly 12.9°C to 21.9°C on a moderate day, so start a touch protected if you’re cold, then be ready to cool as you heat up on climbs. Fueling/fluids should start early on the bike: aim for about 90 g carbs, 750 mg sodium, and 650 ml fluid per hour, and set it up so you don’t “catch up” later when climbs make it harder to eat.

In T2, treat this like a controlled restart: rack the bike and get the first steps under control before you try to build speed. Your quads and glutes will feel the 947 m bike load even if the run is flat/fast—focus on upright posture, quick cadence, and a smooth stride length for the first few minutes. Take a moment to confirm you’re hydrated and start thinking about steady intake rather than chasing early splits.

The run is 21.3 km and flat/fast with 51 m of elevation gain, so the course encourages rhythm—use that. With moderate conditions and SW wind, you’ll likely feel it most as a background resistance or assistance depending on direction, so let it change how you manage effort rather than forcing pace. Since fueling on the bike was planned at 90 g carbs, 750 mg sodium, and 650 ml fluid per hour, your run should feel like continued execution: keep taking fluids and carbs consistently to avoid the common late-race fade. If you’re getting dry or your breathing starts to tighten, it’s often a fueling timing issue—take in carbs and sodium on schedule and use aid stations to top up fluids.