IRONMAN 70.3 Knokke-Heist

Go into the start calm and get your position early: with a 1907 m swim, you want to be seeded for your realistic pace so you’re not constantly punching through slower swimmers or getting stalled by faster ones. Spend your pre-race warm-up doing a few short accelerations so your first strokes feel coordinated, then settle into rhythm quickly once you’re moving. In the first few minutes, focus on clean navigation (staying on line) and controlled breathing—don’t sprint the first stretch; you’re trying to set up a smooth exit for a faster T1.

You’ll cover 1907 m in freshwater where the temperature varies, so start a touch conservative and let your body temperature catch up. Expect visibility and buoy/line navigation to drive your sighting cadence; pick a consistent pattern and keep it until your breathing and cadence feel stable. Because this is an early portion of your day, keep your effort mostly steady—save any “extra” for the final approach to the exit so you don’t fatigue your shoulders too early. During the swim portion, hydrate options aren’t part of the plan—your priority is a smooth, efficient swim so you can transition quickly.

Your T1 should be about speed-to-comfort: as soon as you’re through the exit, execute your equipment routine efficiently (without rushing so much that you forget basics). Get your bike mount steady, then immediately find a repeatable cadence and posture that feels aerodynamic and stable. The first minutes of the bike matter—wind coming from the SW can make you feel slightly different across sections, so settle into your effort rather than chasing watts/cadence too hard at the start.

You ride 89.6 km with 62 m elevation gain on a flat/fast profile—this is a “keep it smooth” course where small surges can steal your legs. With wind at 5.6 m/s from the SW, expect the ride to feel subtly more effort on the exposed sections and calmer on sheltered stretches; ride steady and let your body adapt rather than reacting to every gust. Fuel for the bike at 90 g carbs per hour and 750 mg sodium per hour, taking in about 650 ml fluid per hour to stay ahead of dehydration and maintain performance. Aim to start consuming early enough that your stomach has time to settle into the plan—don’t wait until you feel behind.

In T2 (bike→run), your job is to make the transition feel controlled: expect your legs to feel heavy for the first short portion while your heart rate catches up. Keep the first minutes conservative—let cadence come up naturally rather than forcing speed. Mentally cue quick steps and relaxed shoulders; if you chase early pace, the later flat stretch will punish you.

You run 21 km with 43 m elevation gain on a flat/fast profile, so the primary risk is going out too fast while your body is still adjusting off the bike. With air temperatures roughly in the 14.4–21.6°C range and moderate heat, prioritize consistent hydration and fueling rather than reacting to how “easy” it feels early. Maintain an even effort and use the flat sections to focus on form: tall posture, quick cadence, and smooth foot strike. Continue your planned intake during the run (carbs and fluids at your target rate) so you finish strong instead of fading late.