IRONMAN 70.3 Swansea

Arrive seeded and ready: get a short, easy warm-up in the water (or pool/land warm-up) and use the first few minutes after your start to settle your breathing and find clean sightlines. Because this is freshwater with variable temperature, go slightly conservative on the first 200–400 m so your shoulders and breathing stay relaxed. Stay patient for traffic—don’t chase every swimmer right away; build position steadily so you’re not constantly swerving or accelerating.

Swim 1910 m in freshwater where temperature can vary, so start controlled and let your rhythm build as you warm up. Expect some sighting and minor chop depending on conditions; keep your stroke long and efficient rather than forcing power early. If the water feels cooler, focus on quick, steady breathing and avoid holding your breath to “save energy”—consistent cadence prevents oxygen debt later. Fueling for the swim is usually minimal; prioritize hydration and then transition smoothly into your bike fueling routine right after T1.

Transition smart from swim to bike: after you exit, prioritize a quick bathroom/gear check, put on socks/shoes smoothly if you wear them, and secure goggles/helmet without rushing. In the first minutes on the bike, ease into the climbing profile rather than going hard immediately—especially if the air temp is on the cooler side. Use the last stretch of T1 to get your fueling plan ready (bottles/caps accessible) so you can start drinking within the first few minutes and begin carbs/sodium on schedule.

Ride 89.9 km with 822 m of elevation—this is a hilly/climbing course, so distribute your effort and avoid maxing out on the first climbs. With wind about 5.5 m/s from the W, expect crosswind/headwind effects on exposed sections and variable bike comfort when it hits; stay composed and keep your cadence smooth on climbs. Your fueling target is 90 g carbs/hour with 600 mg sodium and about 500 ml fluid per hour—set it up early and keep it consistent, because the climbs can make you “feel fine” until you’re behind on energy. Sip frequently (not just at the aid stops) and aim for steady intake throughout, especially if the moderate heat rises toward the upper end of the air temperature range.

Transition from bike to run (T2) is about leg management: after you rack the bike, slow your first steps intentionally and cue “smooth and quick” rather than stomping—your quads will feel loaded from the 822 m of climbing. Get your nutrition habits back immediately: start drinking early from the first aid opportunity so you don’t wait until you’re thirsty. Keep your first 1–3 km effort slightly easier than you think you can run; the run is flat/fast (21.5 km) but the bike elev gain still shows up.

Run 21.5 km on a flat/fast profile with only 16 m of elevation gain, which means your pacing can be strong if you’ve managed the bike well. Air temperatures are typically moderate (13.5–19.8 C), so keep an eye on how you feel rather than chasing an early lead—flat courses often tempt you to start too fast. With a W wind of ~5.5 m/s, there can be gusty sections where your stride feels different; stay tall and let your cadence absorb the wind instead of overstriding. Fueling on the run should continue based on your race plan; keep drinking regularly and stay ahead of thirst so you don’t pay for it in the final third.