IRONMAN Chattanooga

Get to the water early enough to settle your breathing and start calm; do a short, practical warm-up (a few controlled efforts) so your first strokes feel familiar when you hit your pace. In Chattanooga, plan to start based on your swim fitness rather than trying to “win position” early—find clean space, avoid chasing feet immediately, and get your stroke rhythm working in the first few minutes. If you’re sensitive to contact, choose a slightly more conservative starting placement and widen your paths to reduce shoulder-to-shoulder friction.

You’ll cover 3,746 m in freshwater where temperature can vary, so rely on your warm-up and your first-lap technique rather than getting reactive to how it feels right away. With the wind typically described as light (3.3 m/s from the NW), expect some surface chop or drift; keep your sighting frequency consistent and aim for smooth, efficient body position to reduce unnecessary effort. Fueling during the swim is not the focus—use the swim to set up rhythm for the bike, and start hydrating as soon as you’re safely able in transition. If the water feels colder than expected, keep your first 10–15 minutes controlled and let speed come from technique, not from forcing power.

Transition flow: after you exit the water, prioritize a smooth changeover—dry/handle equipment quickly, get shoes on cleanly, and keep your first pedal strokes intentional rather than explosive. In the first minutes on the bike, settle into a steady cadence and don’t chase speed; treat the climb/roller rhythm like a pacing puzzle. Keep your head up and scan for wind influence on the flats/turns, then lock into your plan: moderate power early, then build only if you’re on target and feeling controlled.

The bike is 180.6 km with 1,357 m of elevation gain and a rolling profile, so pacing is everything—expect repeated climbs and descents where it’s easy to overcook the legs on the way up. With wind described as 3.3 m/s from the NW, you may feel it more on exposed sections and during directional changes; keep your effort steady and let the wind shape your speed rather than your power. Use your fueling target consistently: 90 g carbs per hour with 1,000 mg sodium and about 800 ml fluid per hour—aim to take it before you feel thirsty or “behind,” then maintain. On rolling terrain, take fluids and carbs on the more manageable segments (flats/short recoveries) so you’re not trying to do everything at max effort on the steepest rises; keep drinking steady through the entire bike rather than saving it for later.

Transition (T2) is where the race can make or break you: focus on getting to a comfortable first stride, not a fast one. Off the bike, expect your legs to feel heavy initially—start slightly conservative for the first kilometers and let the rhythm come to you gradually. Rehearse your run-routine in your mind: quick check for any friction issues (shoes/socks), then settle into a repeatable cadence and effort you can sustain in hot weather.

The run is 42.2 km and the course profile is listed as unknown, but you should assume some variability and manage effort accordingly—hot conditions can make even “flat” feel like a climb. With air temperatures ranging from 17.1°C up to 27°C and overall heat described as hot, you need to protect output: start controlled, then only raise effort if you’re truly on top of hydration. Continue your hydration plan you can sustain in the heat; if you’ve been hitting your bike fueling targets, your run should feel more workable, but don’t assume you can “catch up” later. Use the wind as a small adjustment tool—if you get headwind, hold effort steady and look for small pace recovery when it turns, rather than forcing speed into the heat.