Cycling Science Training Tools

Enter FTP and LTHR to generate Coggan power zones and Friel heart-rate zones.

Best for setting bike computer, trainer and interval targets.

Estimate CP, WPrime and your power curve from 3-minute and 12-minute tests.

Describes short-interval capacity better than a single FTP value.

Estimate oxygen uptake from steady power and body weight with the ACSM cycling equation.

Useful for tracking indoor step tests and rehab-phase changes.

Estimate speed, VAM and climbing time from grade, body mass, bike mass, CdA and Crr.

Check whether target power can deliver a target climb time before race day.

Upload GPX and estimate power, speed, time and fueling reminders for each graded segment.

Most useful for hilly races and long climbs.

Estimate approximate CdA from power, speed, grade and wind on a steady segment.

Compare whether position, wheels, clothing and cockpit changes are truly faster.

Build periodized plans and draggable weekly workouts from FTP, CTL/ATL, weekly hours and race goals.

Turns 3:1 periodization, TID and ramp rate into an executable calendar.

Project CTL, ATL, TSB and weekly TSS for the next six weeks.

Find weeks with low TSB, fast ramp or taper needs.

Create structured power workouts and export Zwift-compatible .zwo files.

Supports warmup, steady blocks, intervals, cooldown, textevents and PL/RPE feedback.

Use TSS, IF and ACWR to judge whether this week is a load spike or needs backing off.

Avoid stacked hard days and sudden weekly volume jumps.

Generate carbs, fluid, sodium and fueling timing from duration, intensity and weather.

Essential for training sessions and races longer than 90 minutes.