Fitness Testing
Fitness Testing > Tests > Speed & Power > Vertical Jump > Bosco > Drop Jump
Bosco Drop Jump
This procedure describes the method used for measuring leg power using the Drop Jump, where the athlete jumps after a drop of a given height, with hands on hips. In this test, no arm swinging is allowed. This is part of the Bosco Ergo Jump System. See more about other vertical jump techniques.
- equipment required: bosco ergojump measurement system (or similar device - e.g. just jump mat, Myotest, infrared laser system), boxes of heights: 20 cm, 40 cm, 60 cm, 80 cm and 100 cm
- procedure: This test is performed from five standardized drop heights: 20 cm, 40 cm, 60 cm, 80 cm and 100 cm. The athlete stands on the box, adjacent to the timing mat. Hands are placed on the hips, and stay there throughout the test. The athlete then drops down off the box onto the mat, bending the knees on landing, then immediately going in to a maximal vertical jump.The technique is as per the Counter Movement Jump. The athlete jumps vertically as high as possible, and back on the mat with both feet landing at the same time. Allow an adequate rest between trials.
- scoring: The timing mat may give a score of the time in the air, and the calculated vertical jump height can be calculated. Height can be calculated using this formula: jump height = 4.9 x (0.5 x Time)^2 ).
- disadvantages: requires athletes with good degree of leg strength, as the forces through the body is much higher than for a standard vertical jump test. The standard size boxes are not readily available, and may even need to be custom made.
- comments: The subject may benefit from practice, and should be verbally encouraged to perform maximally each time.
Related Pages
- video of a Bosco Test being conducted
- about Carmelo Bosco
- a discussion about the various vertical jump equipment available
- a discussion about other vertical jump techniques
- see the list of anaerobic tests for other fitness tests of leg power.
