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The Exercise Registry is a list of all exercises for improving the physiology, function and appearance of the human body. It includes exercises that use machines, exercises that use free weights, and free exercises that only use the body and its natural surroundings, such as the ground or water.

There are many categories of exercises that overlap or are classified for a variety of reasons.

CARDIO, CARDIOVASCULAR, AEROBIC or ENDURANCE
Exercise that is used to condition the heart and cardiovascular system and the aerobic energy system. Aerobic System — energy released is met by the metabolism of available oxygen and nutritional fuel. Initially the body’s circulatory system is not prepared to deliver enough oxygen for most increased levels of activity, but by five minutes of exercise, the Aerobic System is the capable system. An example of steady state Aerobic System energy output is a long distance or marathon run.

FLEXIBILITY OR CO-ACTIVATION EXERCISES
Exercise that is used to increase joint range of motion (ROM), joint integrity and muscle balance from parallel muscles, series muscles and antagonist/agonist pairs.

Stretching
Often used for warm-ups or specifically to increase joint range of motion.

WEIGHT TRANING OR PROGRESSIVE RESISTANCE EXERCISE
See the following sub-categories:

Progressive Resistance Exercises for Muscular Endurance
Usually15 to 20 repetitions with a light weight (30-60% of 1rm), with a goal of increasing intramuscular stores of phosphocreatine and ATP, as well as speeding clearance of muscle contraction byproducts.

Progressive Resistance Exercises for  Muscular Strength
Usually 2 to 6 repetitions with heavier weight (80-90% of 1rm) to build contractile proteins.

Progressive Resistance Exercises for  Muscular Hypertrophy
Usually to increase muscle size, 6-12 repetitions with a weight equivalent to 60-80% of ones 1rm should be performed.

Machine Exercises
Exercises that use machines. Several types of machines exist to train the body. A machine can be as simple as a fixed pull-up bar or parallel dip bars; or as complicated as a selectorized-plate machine with multiple pulleys and cams that attempts to change how resistance is felt and transmitted through the body.

Free Weight Exercises
Exercises that use free weights. Bars, barbells, dumbbells, medicine balls are the type of free weights that characterized free weight exercise. The weights are free because they are not attached to any machine or complicated, engineered device.

Free Exercises, BYOB or Bring Your Own Body Weight Exercises
Exercises that only use the body and its natural surroundings. Exercises that use only the weight of the body against the ground, floor or wall surfaces and require no equipment (except maybe clothes or shoes) are free exercises.

Simple Exercise
Only one joint used.

Compound Exercises
Multiple joints used.

SPORTS SPECIFIC EXERCISES
Exercises that train specific to the sport event or team position goals and performance requirements of the athlete.