What triathletes track in Baseline
Triathlon generates data from three different sports, often recorded on three different devices - a Garmin Forerunner for swim and run, a Wahoo ELEMNT for bike power, and a WHOOP strap for recovery. The challenge is that no single platform treats all three sports as one dataset. Strava splits them by sport type. TrainingPeaks combines them but only for athletes following a structured plan. Garmin Connect only shows Garmin data. Baseline was designed for the multi-device triathlete: it unifies swim, bike, and run into a single training load model, detects brick sessions automatically, and cross-references your performance across all three sports with your recovery data from WHOOP or Oura. If you train for triathlon, Baseline shows you the full picture - not just one sport at a time.
Sport-specific KPIs we surface
Combined CTL/ATL/TSB (all three sports). The biggest challenge in triathlon training is managing total fatigue across three sports. Baseline's training load model normalises TSS across swim (based on pace and heart rate), bike (based on power or heart rate), and run (based on pace and heart rate) into a single CTL/ATL/TSB chart. You can see at a glance whether your total training stress is producing fitness or accumulating fatigue, and how each sport contributes to the total.
Sport-specific TSS distribution. What percentage of your total training load comes from swimming vs cycling vs running? Baseline's sport mix charts show your TSS and time distribution across sports by week, month, and year. This reveals imbalances - too much bike at the expense of run? Not enough swim volume relative to your goal race distance?
Critical Swim Speed (CSS). CSS is swimming's threshold pace analog. Baseline estimates CSS from your best efforts and tracks it over time alongside your bike FTP and run critical pace. For triathletes, the relationship between CSS improvements and bike-run performance is illuminating - Baseline makes it visible.
FTP (cycling). Cycling Functional Threshold Power, auto-detected from your best 20-minute and 60-minute efforts. Baseline tracks FTP and w/kg trends over time and correlates them with your swim and run training load. Does a big swim block affect your bike FTP? The data shows the answer.
Grade-Adjusted Pace (GAP) for running. Running pace adjusted for elevation, so you can compare run performance across different courses. Baseline tracks GAP for every run and correlates it with bike FTP and swim CSS for a complete endurance picture.
Brick session detection and load. Baseline automatically detects brick sessions - workouts where you bike then run (or swim then bike) within a short window - and tracks their frequency and training load. Brick sessions carry a disproportionate physiological load, and Baseline accounts for them separately in your fatigue model.
Sport mix donut and trends. A visual breakdown of how you spend your training time and TSS across sports. The donut chart shows current period distribution; trend lines show how your sport mix has changed over months. If your race is 50% bike time but you're spending 60% of training on the bike, that's useful information.
Recommended integrations for triathletes
- Strava: The single most important connection for triathletes. Most triathletes record all three sports through Strava-connected devices. Baseline imports every activity automatically - swim GPS and pace, bike power and NP, run splits and GAP - all into one unified feed.
- WHOOP: Triathlon training generates more cumulative fatigue than single-sport training. WHOOP recovery scores help you manage the load across three sports. Connect WHOOP to see your combined CTL/ATL/TSB alongside your recovery score, and identify the recovery thresholds that predict your best brick sessions.
- Garmin: If you use a Garmin Forerunner or Fenix for all three sports, the planned Garmin integration will bring swim CSS estimates, bike power data, run dynamics, Body Battery, and Training Readiness into your unified triathlon dashboard.
- Apple Health: Apple Watch triathletes can import all three sports plus daily health metrics (RHR, HRV, sleep) through the zip export. Combine with Strava for the most complete picture.
Pricing tease
Baseline is free to start. The free tier includes your dashboard with one connected source and combined training load for a single sport. Upgrade to Baseline Pro for $12/month (or $249 lifetime) to unlock unlimited integrations across all three sports, AI-powered daily insights that correlate your swim/bike/run performance with recovery, brick session detection, sport mix analysis, full-resolution heatmap with all sports overlaid, geographic stats by country, and 50+ achievement badges including triathlon-specific milestones. No ads, no data sharing, no hidden upsells.