January 22, 2026 · 3 min read

Cycling Minimalism — the Metrics You Actually Need (and the Ones to Ignore)

Your trainer screen, your app, your watch — each shows a dozen-plus numbers at once. Actually making training decisions needs four, maybe five. The rest is noise that just distracts. Here's what's worth tracking, and what you can safely ignore.

Essential — without these, training is flying blind

1. FTP (Functional Threshold Power)

The reference point for every training zone. Without a current FTP, intervals, ERG mode and your training plan are set by guesswork. Check how your FTP per kilogram of body weight compares with other cyclists, to know where you actually stand.

2. Current power (W) and power zones

The only indicator that tells you exactly how hard you're working at a given moment — no delay, no influence from weather or fatigue. The basis for controlling interval intensity.

3. TSS, CTL, ATL, TSB

Four numbers that answer the question "can I ride hard today, or should I ease off". CTL shows long-term form, ATL current fatigue, TSB readiness. Without this it's easy to slide into overtraining or train too softly. Full explanation in our article on TSS.

4. Heart rate (as a supplement, not a replacement for power)

Not for controlling intervals, but irreplaceable for assessing fatigue and recovery — at the same power, a rising heart rate is a sign the body is working harder than usual.

Useful, but not critical

• Cadence — helpful when working on technique, but doesn't directly drive most amateurs' training decisions.
• Distance and speed — practically meaningless on the trainer; power and time tell you everything you need.
• Kilojoules burned — useful for planning nutrition, unnecessary for assessing the workout itself.

Noise — safe to ignore

• Estimated VO2max from a watch — algorithms differ between manufacturers, and values can jump by several points day to day with no actual change in form. Not suited to tracking progress.
• Proprietary "form" and "readiness" scores — black boxes that in practice just recompute the same data (CTL/ATL) onto their own scale. If you already have TSB, an extra proprietary indicator adds nothing new.
• Left/right power balance — interesting for professionals with a bike fitter on hand; for an amateur, a number with no action attached to it.
• Segment comparisons with other riders — motivating, but they say nothing about your own training and progress.

The minimal set to start with

If you had to pick the absolute minimum: FTP, current power during the ride, weekly TSS, and the CTL/ATL/TSB trend. Those four numbers are enough to know how much to ride, how hard, and when to back off — everything else is an add-on, not a foundation.

← All blog posts