For the cinematic evaluation of the sport performance it's possible to use one or more jumping mats.
These mats are used to record contact time and fly time during a ballistic movement (jumping action) in order to evaluate the functional and neuromuscular features of the lower limb muscles.
The tests give specific indications to evaluate a person, to program the training workout and to monitor the progress.
The contact mat can be easily used in gymnasium and athletic circuit.
1 - SQUAT JUMP: Explosive force assessment, UM recruitment, evaluation of the % FT
The Squat Jump allows to estimate, from the elevation, the capability of the inferior limbs to express explosive force.
The elevation is obtained from the flight time of the subject with the formula:h=t2 x 1,226
In this test the subject stand on the center of a platform in 1/2 squat position (both knee bended at 90°), with trunk erected and the hands at waist, to perform a vertical jump.
The athlete has to carry out this test without countermovement in order to avoid the storage of elastic energy.
The takeoff and the landing must be performed with legs and feet completely extended.
After the landing it is advisable to carry outother little rebounds on toes
The activation mode is concentric and it is preceded by an eccentric activity.
Elasticity index = ((CMJ-SJ)/SJ)100
The CMJ is a test in which the jumping action is performed thanks to the strengthening and shortening of the elastic elements of the muscle.
Standing on the contact mat in erected position, with legs extended and both hands on hips, the athlete has to perform a vertical jump after a rapid counter movement with the knees 90° bent.
During the counter movement the trunk must be erected to avoid any possible influence on the lower limbs performance.
In the downward movement the extensors are activated only during the inversion movement: this means that the strengthening of the elastic elements and the subsequent reuse of elastic energy is very limited.
This test allows to estimate the mechanical power and the anaerobic lactacid and alactacid metabolism during consecutive jumps.
It consists of repeated jumps with countermovement for a variable time (5"-60") or for a specific number of jumps to be set.
The mechanical power can be calculated with the following formula:
Power = (tv2g2)/(4Tc)
P = power in watt x kg of weight
G = acceleration of gravity (9,81 m/s-2)
The test consists in executing without interruption jumps with countermovement, both knee bent at 90° and hands at the waist.
The parameters of reference are the average height (cm) or the average mechanical power (W x Kg) developed during the test.
The more used test previews a duration of 15" in order to estimate the capability to produce power using the CP-ATP system (anaerobic alactacid metabolism .
With tests that last from 30 to 60 second we evaluate the fatigue resistance, in particular the distribution of anaerobic lactacid power and the loss of elastic energy production.
It is an important test to evaluate the “REFLEX ELASTIC EXPLOSIVE” expression of the force produced by lower limbs and quadriceps in particular.
This test consists of a vertical jump to perform after a fall from a predetermined height.
After the impact the subject must jump upward with the maximum power.
The test foreseen 5 falls from steps of 20-40-60-80-100 cm in order to identify the optimum height of fall or the BDJ (the best drop jump).
On the contrary of CMJ, in this test we have a strong effect of the stretching reflex, that produce a massive recruitment of UM, and a greater elastic deformation that allow to store and reuse a great amount of elastic energy.