07 / Fitness & FTP

Fitness, fatigue & FTP.

How Bunch reads your training across rides. Sample rides never count.

Estimated FTP: Your best 20-minute estimated power × 0.95, from solo rides in the last 42 days. Group rides are left out because drafting inflates estimated power.
Training load: Your heart-rate effort score when there is one, since it measures you rather than the bike. Otherwise TSS from power: hours × (normalized power ÷ FTP)² × 100. Both come to about 100 for an hour ridden hard.
Power curve: Your best saved power for every length from 1 minute to 2 hours, last 90 days against all time. Under a minute is left out, since GPS is too rough to time a sprint.

Fitness & fatigue (daily)

fitness += (load − fitness) ÷ 42   // about 6 weeks
fatigue += (load − fatigue) ÷ 7    // about 1 week
form     = fitness − fatigue

Fresh5 or more

Steady−10 to 5

Building−30 to −10

Very tiredbelow −30

See you out there.