The total work being done in an overall exercise session. the amount of weight, or force opposing the movement of the muscle. the number of times you can perform an exercise continuously in a row. the amount of weight that can be lifted one time.

Work done is equal to Force times distance

Explanation:

exercise always follow an exercise prescription which in most case follow the Acronym "FITT" Principles where F=Frequency, I=Intensity, T=Type of Exercise and T=Time (duration) of the exercise.

when considering the amount of work done during an exercise, it depends on the type of Muscular contraction that is taking place during the exercise, which we Lead us to 1) Isometric exercise 2) Isotonic exercise and 3) Isokinetic exercise.

The number of time you  can perform an exercise in a row depend on the energy composition of the individual performing the exercise which in most time individuals performing short distance exercise uses Anaerobic mode mode of energy.

answer 2 is the right one. jim should measure his snack to make sure he is using the right serving size.