Can a workout recover useful energy?
Could gym strength machines recover useful electricity? A numbers-first check of an appealing idea.
- Status
- Numerical feasibility study
- Year
- 2026
- Role
- Solo, AI-assisted
- Area
- Research
In plain English
It sounds appealing: every rep on a weight machine involves energy, so why not capture it? This study checked the idea against the physics of a full exercise cycle before anyone builds hardware. It is a numerical feasibility study, and no equipment was built or modified.
How it works
- Model a full exercise cycle, including the energy needed to reset the weight.
- Separate assistance while lowering, extra work while lifting, and energy the machine already loses.
- Account for generator limits, conversion losses and standby power draw.
- Compare the energy recovered with the energy the system itself uses.
What I did
I ran this study solo, with AI assistance for the research and the numerical model.
What I learned
Accounting for the full exercise cycle, including reset energy, changed the conclusion. Checking the whole loop before trusting a headline number is the habit I took away.