Squat Jump
The squat jump is a jump form used in sports science for jump diagnostics to test the pure concentric strength of the jump muscles; a backward movement is not permitted.
Usually, the jump is performed from a crouching position and contains no coordinative elements due to the lack of backward movement. The arms are placed on the hips and should not be actively involved during the movement. The goal is to jump as high as possible.
When making this jump, it is important to note that a (barely noticeable) downward swinging movement from the crouching position (see Counter Movement Jump ) can already have a positive effect on the height of the jump, but falsifies the result due to the prohibition of any swinging movements.
At least the flight altitude is measured as a performance index during this jump, usually with the help of force plates .