Movement of your body that requires the work of your skeletal muscles.

It is considered planned, structured and purposeful physical activity.

It is how often you perform exercises.

It is how hard you perform exercises.

It is the duration or how long you perform exercises.

It refers to the sort of physical activities and exercises to complete.

It is any physical activity that increases your breathing and heart rate.

It refers to physical activity that you can only maintain for a short period. It involves quick bursts of high-intensity movement.

principle states that in order to keep making gains from an exercise program, you must find some way to make it more difficult. 

is a concept that states workout gains or progress will be lost when an athlete stops training.