Notes on metrics, training, and honest measurement.
Fourteen posts, in five arcs. Each one is anchored to a cohesive block of metrics tensr can capture from the force–time curve of a single set — what to track, why it matters, and what to do about it tomorrow.
Arc A The framework
Tension over count, and a unit (N·s) to think in.
- 01 Time under tension, finally measured. Two lifters do '3×10 at 100 lbs.' One finishes in 90 seconds, one in 220. The integer in your set log can't see the difference. Time under tension can.
- 02 Sets × reps × weight is lying to you. '3×10 at 100 lbs' records what you planned. Impulse — force times time, integrated — records what your muscles actually did. The unit volume should have been measured in all along.
Arc B Not all reps are equal
Tempo, effective reps, fatigue. The integer in your set log is lying to you.
- 03 Slow the eccentric. Watch the number move. Same load, same reps, double the eccentric — the set TUT changes by 60% and the set looks identical on paper. Tempo is the biggest hypertrophy lever most lifters never measure.
- 04 Only the hard reps grow you. A set of 12 where reps 1–7 are warm-ups for reps 8–12. The first seven are heating; the last five are stimulus. Effective reps put a number on which is which.
- 05 Junk volume has a fingerprint. The set where rep 1 peaks at 400 N and rep 12 peaks at 240. The middle reps were the work. The last three were noise. Decay is not failure — it's the shape that names the load mistake.
Arc C The second wave
Form quality, symmetry, RFD, and adherence.
Posts in this arc are still being written.
Arc D The long view
What you do with months of data.
Posts in this arc are still being written.
Arc E Tools and trust
Sensor honesty and data ownership.
Posts in this arc are still being written.