Evaluate the various types of exercise according to their contribution to different types of fitness.

A. Isometric exercise is performed by contracting muscles against an immovable object.
1. It contributes to muscle strength.
2. It does not contribute to other types of fitness-muscle endurance, flexibility, or aerobic (cardiorespiratory) fitness.
B. Isotonic exercise requires contraction of muscles and movement of joints and includes weightlifting and traditional calisthenics.
1. It can improve muscle strength and muscle endurance.
2. It does not contribute to flexibility or aerobic fitness.
C. Isokinetic exercise is a departure from traditional weightlifting or calisthenics and requires specialized equipment.
1. It requires exertion both in lifting and in returning to the original position.
2. It is more useful in rehabilitation than in achieving fitness.
D. Anaerobic exercise requires large energy expenditure in a short amount of time, such as running sprints.
1. It can improve muscle strength
2. It does not require endurance or lead to aerobic fitness.
E. Aerobic exercise requires increased oxygen consumption over a period of 12 to 20 minutes, combining duration and intensity.
1. It produces cardiovascular benefits.
2. It can also produce muscle strength and muscle endurance as well as being the best type of exercise for weight control.
3. It generally does not produce increased flexibility.