IRONMAN Tallinn

Get to the start with enough time to settle your breathing and arms before you line up. If you’re unsure of your pace, seed a little conservatively so you spend the first minutes threading around slower swimmers rather than sprinting and getting boxed in. In the first few minutes, stay calm and efficient—your goal is clean strokes and finding clear water, not matching the fastest lanes immediately.

You’ll swim 4,001m in freshwater; the temperature varies, so hydrate and manage intensity early. Expect a relatively controlled start where you can settle into rhythm; if conditions create chop or current feel, shorten your stroke slightly and keep your head steady to avoid wasting energy. Use every long, straight stretch to rotate and stay streamlined, and avoid “chasing” other swimmers—aim for even effort you can repeat through the middle and closing portions. Fueling in-race is usually limited on the swim, so set yourself up to start taking fluids immediately after you exit—then your bike fueling plan can begin on time.

In T1, prioritize quick dismount-to-gear flow: rack position you can find without thinking, socks/shoes on decisively, and helmet secured before you spend extra time standing. As you mount, keep the first kilometers easy enough to let your legs settle from the swim and switch to a steady cadence. This is also where you lock into your fueling schedule—start sipping and taking carbs right away so you don’t “catch up” later when the ride gets harder.

The bike is 179.3km with 512m of elevation gain and a flat/fast profile, so the day will reward consistent power rather than surging. With wind at 5.2 m/s from the SW, you’ll feel the breeze as a steady pressure on certain portions—on headwind stretches, resist the urge to spike effort; instead, keep output controlled and maintain smooth cadence. On tailwind or crosswind sections, stay patient: keep aero position clean, avoid sudden steering inputs, and don’t overcook the watts when speed is high. Fuel and hydration should stay on target throughout: 90 g carbs/hour, about 600 mg sodium/hour, and roughly 500 ml fluid/hour—aim to take it in regularly rather than in large, late gulps.

In T2, manage the transition so your first steps feel controlled. Expect your legs to feel a bit heavy at the start—normalize your stride, lower your effort slightly for the first few minutes, and let circulation catch up. Mentally, plan for steady pace building rather than sprinting out of the chute just because you’re off the bike.

The run is 42.2km; since the profile is listed as unknown and elevation gain isn’t provided, treat it like a pacing-and-effort race: stay disciplined with form and cadence as the course unfolds. In moderate air temperatures (13.4–19.9°C) with a SW wind around 5.2 m/s, you may feel cooler at times, but don’t use that as permission to run too hard early—aim for a sustainable effort so you can hold form deep into the marathon. Keep drinking on schedule and take in carbs consistently as planned for the day; the bike fueling target you trained with (90 g carbs/hour, 600 mg sodium/hour, ~500 ml fluid/hour) is a strong guide for maintaining overall intake, but use what you’ve practiced and what aid stations offer. If wind kicks up on exposed segments, stay compact, protect your upper body, and use shorter steps to keep efficiency rather than fighting it.