Experiment
Fitness log
A phone app that logs my workout sessions and sets the weight and reps for each machine's next session.
The problem
Gym apps either record what you did or hand you a fixed program. I wanted one that reads how my last session went and tells me what to lift next, on a phone between sets, even where the signal drops.
I also wanted AI in the loop without letting it run my training. A model is good at noticing that a week of short sleep lines up with stalled lifts. It should not get to change the plan on its own.
What it does
Logging
- Each set takes a tap or two: weight, reps, and how many more reps I could have done.
- Sets save on the phone first and sync when the connection comes back.
- Runs, yoga, and strength sessions from my watch come in through a periodic health export, so I don't log them twice.
Setting the next session
- Every set is adjusted for fatigue, so a third set at the same weight counts as the effort it was.
- When every set clears the top of the rep range, the weight goes up. When sets fall short twice at the same weight, it comes down about 10%.
- A weight increase happens only if the strength estimate says I can still hit the bottom of the range at the new weight. Otherwise the weight holds and the rep goal rises.
- During a session, a set that comes in well off target adjusts the next set's weight.
Weekly review
- On Sundays an AI review reads the week's training alongside resting heart rate, heart-rate variability, and sleep.
- It proposes specific changes to the plan. I accept or dismiss each one, and nothing changes without that.