Answer:
The rate of doing work is called intensity.
Step-by-step explanation:
Intensity can be thought of as how hard you work. Working at varying intensity, relative to fitness goals, is how you achieve your goal. If you want to improve your cardiovascular fitness level, you'd exercise by running, walking or cycling to work the heart muscle for an extended period of time. If you want to gain muscle, your intensity level would be high (heavy weight) with short repetitions. If you want to gain strength, your intensity level would be lower, with more repetitions.