Countermovement and squat jump height were both 13 6 cm higher with motion capture 90 confidence limits 0 3 cm but this very large difference was reduced to small unclear differences when adjusted.
Just jump mat accuracy.
Accuracy of a vertical jump contact mat for determining jump height and flight time.
The mat calculates vertical jump height by measuring the time that the feet are not in contact with the mat and from this calculates explosive leg power just jump system top end sport 2014.
The just jump system is an example of an electrical contact operated system.
The use of a contact mat has some restrictions as to the accuracy of the measurement of flight time and thus jump height 35.
Using the just jump system.
The mat calculates vertical jump height by measuring the time that the feet are not in contact with the mat and from this calculates explosive leg power.
20 analyzed the accuracy of two jump mat system and concluded that jump mat system provides trustworthy measurements.
The just jump testing system is a contact mat that collects air and contact times.
877 881 2015 several devices are available to measure vertical jump vj height based on flight time vj reach height or ground reaction forces.
Most coaches that use the testing device measure air time when testing vertical jumps.
The just jump mat is a 27 inch x 27 inch mat with a hand held battery operated computer unit.
For example the just jump system probotics inc huntsville.
The jump mat systems produced nearly identical measures of jump height differences in means and in technical errors of measurement 1 mm.
Int j sports physiol perform.