There was/is a trend of "science gyms" that do 20 minute per week personal training.
The meticulous PT format and exercise selection allows them to achieve more muscle gain in 20 minutes per week than median trainees achieve in 2-3 hours. The short sessions make personal training economically viable.
That said... optimizing that heavily tends to eliminate all unmeasured benefits. The habit forming. Mentality/personality changes that would occur from more typical exercise approaches. Cardio. Etc.
But... it does demonstrate the principle.
Minimum effective doses are powerful. But, they require precision.
Also... you need to consider the candidate. If your body is adapted to almost no exercise... it is also highly sensitive to seemingly small doses of it.
What is or is not "exercise" is mostly determined by proximity to your day to day.
If you never exercise, never speak to other people, or never eat any fresh food... a little goes a very long way.
The meticulous PT format and exercise selection allows them to achieve more muscle gain in 20 minutes per week than median trainees achieve in 2-3 hours. The short sessions make personal training economically viable.
That said... optimizing that heavily tends to eliminate all unmeasured benefits. The habit forming. Mentality/personality changes that would occur from more typical exercise approaches. Cardio. Etc.
But... it does demonstrate the principle.
Minimum effective doses are powerful. But, they require precision.
Also... you need to consider the candidate. If your body is adapted to almost no exercise... it is also highly sensitive to seemingly small doses of it.
What is or is not "exercise" is mostly determined by proximity to your day to day.
If you never exercise, never speak to other people, or never eat any fresh food... a little goes a very long way.