I think that is a workout, starting with the simple things first. Like walking or stretching, etc, and then a harder exercise, such as running, jumping, etc.
I think the exercise will start by doing simple things such as walking or stretching, and then switch to a more vigorous exercise such as running or jumping.
I thought I have to exercise by the start of doing simple things, such as walking or stretching, etc., then switch to exercise harder. Such as running, jumping, etc.