Tugball may be the first game that combines both an isotonic and isometric exercise into one game. In an isotonic contraction, tension remains unchanged and the muscle's length changes. An example of this in Tugball is running. Isometric exercises are a type of strength training in which the joint angle and muscle length do not change during contraction. An example of this in Tugball is tugging on the ropes against an opponent. This is another example of how unique Tugball is.
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