- CSS (Critical Swim Speed) is the foundation of open water pacing. The AI calculates your CSS from pool data and uses it to set open water pace targets that account for the 5-10% pace drop most swimmers see without walls and flip turns.
- Sighting every 6-8 strokes costs energy and disrupts rhythm. The AI programs specific sighting drills in pool sessions so the skill becomes automatic before you need it in race conditions.
- Drafting can save 18-25% of energy expenditure in open water (Chatard et al., 2003, Medicine and Science in Sports and Exercise). The AI includes drafting practice in group open water sessions.
- Wetsuit swimming changes body position and stroke mechanics. The AI adjusts your training when wetsuit-legal races are on the calendar, including wetsuit-specific open water sessions.
AI Coach for Open Water Swimming
Pool fitness does not automatically transfer to open water. Sighting, drafting, pacing without walls, and dealing with conditions are all skills that need deliberate practice. Your AI coach bridges the gap.
What you get
CSS-based training structure
The AI builds your swim training around Critical Swim Speed, calculated from your pool time trials. Sessions include threshold sets at CSS, endurance swims below CSS, and speed work above it. As your CSS improves, all training paces update automatically.
Pool-to-open-water transfer sessions
The AI programs pool sessions that simulate open water demands: continuous swims without wall pushoffs, sighting drills every 6-8 strokes, and pace consistency sets where you hold even splits without the clock. These sessions build the specific fitness open water requires.
Race-specific preparation
For triathletes, the AI builds swim sessions that target your specific race distance and conditions. It programs mass-start practice, drafting skills, and the ability to settle into pace quickly after an aggressive start. For standalone OWS races, it builds volume and pacing for the target distance.
Conditions adaptation
The AI adjusts open water sessions based on conditions you report: chop, current, cold water, low visibility. It programs progressive exposure so you build confidence handling real-world conditions rather than just logging meters in a calm pool.
Questions
How does pool training transfer to open water?+
Pool fitness provides the engine, but open water adds variables: no walls for rest, no lane lines for navigation, and no black line for pacing. Most swimmers lose 5-10% of their pool pace in open water. The AI programs specific sessions that close this gap through continuous swims, sighting practice, and pacing without the clock.
What is CSS and why does it matter for open water?+
Critical Swim Speed is your sustainable threshold pace, calculated from time trials at 200m and 400m (or similar). It predicts the pace you can hold for 1500m+ without fading. The AI uses CSS to set all your training paces and open water targets, adjusting for the expected pace drop in open water conditions.
How often should I swim in open water?+
Once or twice per week during race season is ideal, with the rest of your sessions in the pool where you can focus on technique and structured intervals. The AI schedules open water sessions on days when the training goal aligns with what open water provides: sustained pacing, sighting, and conditions adaptation.
Does wetsuit swimming change my training?+
Wetsuits improve buoyancy and body position, which typically makes you 3-8% faster. But they also restrict shoulder mobility and change your catch. The AI programs wetsuit sessions before wetsuit-legal races so you adapt your stroke and know your wetsuit pace for race-day planning.
Can this help with triathlon swim anxiety?+
Yes. Swim anxiety often comes from unpredictability - contact, sighting stress, and pacing uncertainty. The AI builds progressive open water exposure starting with calm conditions and short distances, then adds complexity. It also programs race-simulation sessions so race day feels familiar, not overwhelming.
A coach that texts you first.
After every workout and night of sleep, it messages you with the analysis - and what to change. Free for 7 days.
Used by runners, cyclists, and triathletes worldwide