Explain why exercise programs must increase in difficulty and duration over time to remain effective

It gets harder to lose more weight each time someone exercises

Explanation:

the thinner someone gets, the harder it is to lose weight

As a personal trainer, you must increase wait over periods of time or your bodies muscle will not grow, I’m fact it will get weaker until you have to start going down wait.. now staying at the same wait with multiple reps (repetition) can increase your strength depending on how many you have to do.

Explanation:

Please give brianliest could really use it! Thank you

answer; i believe that the correct answer is (a) restriction);

there should be recorded video of the class under the assignments for the day