IRONMAN 70.3 Muskoka

Start by keeping your warm-up simple and purposeful: a gradual ramp in effort in the minutes before the start so your shoulders and hips feel “free,” not tight. Line up based on your swim comfort and expected pace; if you’re unsure, seed slightly slower to avoid getting kicked early. In the first few minutes, focus on calm breathing, long strokes, and settling into rhythm as the pack compresses.

You’ll swim 1.9 km in freshwater where the temperature can vary, so your goal is to start slightly controlled and then build once you’re fully settled. Expect intermittent crowding early—keep your line, avoid crossing elbows, and breathe consistently even when you feel bumps. The westerly wind won’t directly drive the swim like it does on land, but it can influence surface chop near the start and exits, so stay relaxed in your catch. Fueling during the swim is not the priority; instead, be ready to transition smoothly and have your first bike calories and fluids queued for right after T1.

In T1, keep it efficient: come out of the water, get your legs moving quickly, and avoid long standing. Put on what you need in a controlled order (helmet, eyewear, cycling kit), then start pedaling as soon as you’re stable to avoid stiffening up. Off the bike-to-gear routine, get your first drinks and first carbs going right away so the first 15–20 minutes become “build and settle,” not “catch up.”

Ride 90 km on an unknown profile with a steady 4.1 m/s wind from the west, which means you’ll likely feel it as cross/into on one side of the course and more tailwind assist on the other. Use the wind to your advantage: don’t chase speed when it’s tailwind—hold power you can sustain, and let effort be your governor. In moderate heat (15.3–25.4°C), make hydration a non-negotiable early; aim to consume the planned fueling targets consistently rather than waiting for thirst. During the ride, target about 90 g carbs per hour, 1000 mg sodium per hour, and about 800 ml fluid per hour—use your bottle/cup setup to hit those numbers from the start, especially if the course forces more stop-and-go or slower sections at turns.

In T2, your main job is to transition from cycling rhythm to a controlled run—don’t force the first steps. Expect your legs to feel heavy and “skatey” for the first few minutes; focus on a quick cadence and relaxed upper body until your stride smooths out. Take a moment at your first aid/refresh access to get moving with your hydration plan before you fully lock into pace.

Run 21.1 km in moderate heat (15.3–25.4°C) where maintaining fluid balance will matter as the day warms. With a westerly 4.1 m/s breeze, you may feel cooling help at times; don’t let that trick you into running harder than planned—heat + dehydration are the combination that slows most athletes late. Keep fuel timing consistent with the race fueling targets: about 90 g carbs per hour and 1000 mg sodium per hour, and continue toward about 800 ml fluid per hour overall. Use small, frequent sips and planned carb intake at aid stations rather than trying to “catch up” between them. If you feel your breathing tighten, shorten stride slightly and bring cadence up while holding your effort steady until it settles.