AIM Repeatability evaluation of the flight time (FT) tests for SJ, CMJ, CMJBL and SPJ (Spike jump) METHODS Tests were carried out on 8 volleyball players (age16±1, height 166,4±8 cm, weight 65±8 kg) who had been trained at least twice a week and for no fewer than three years. Before beginning the repeatability protocol, the participants had completed one month of training in the jumping techniques in order to reduce the learning effect. The protocol consisted of 3 tests per day on 3 different days; each test day was followed by a day of rest. The recovery time between each test on a given day was 60 minutes. After a specific warm-up, the athletes moved onto the tests which consisted of 3 trials for each type of jump with a recovery time of 60 seconds, and of three minutes between different jump types. STATISTICAL ANALYSIS The ICC, the variance between the tests and the variance between the days were calculated. Furthermore, the standard error of the mean was calculated within (SEMw) and between (SEMb) the participants. RESULTS The data shows that the opto jump allows a repeatable measurement of flight time (FT) with an average ICC of 95%. The percentage of mean variance due to the tests (4%) was found to be greater with respect to the mean variance between days (2%). The SEMw was 1%, while the SEMb was 3%. DISCUSSION/CONCLUSION The FTs in each test, with ICC value, were greater than 90%. Furthermore the results confirm not only the high level of repeatability of the measurements but also that the observed differences were mainly due to individual differences between the participants.
The Repeatability of Jump tests measured with the Opto Jump
GOLLIN, MASSIMILIANO;
2012-01-01
Abstract
AIM Repeatability evaluation of the flight time (FT) tests for SJ, CMJ, CMJBL and SPJ (Spike jump) METHODS Tests were carried out on 8 volleyball players (age16±1, height 166,4±8 cm, weight 65±8 kg) who had been trained at least twice a week and for no fewer than three years. Before beginning the repeatability protocol, the participants had completed one month of training in the jumping techniques in order to reduce the learning effect. The protocol consisted of 3 tests per day on 3 different days; each test day was followed by a day of rest. The recovery time between each test on a given day was 60 minutes. After a specific warm-up, the athletes moved onto the tests which consisted of 3 trials for each type of jump with a recovery time of 60 seconds, and of three minutes between different jump types. STATISTICAL ANALYSIS The ICC, the variance between the tests and the variance between the days were calculated. Furthermore, the standard error of the mean was calculated within (SEMw) and between (SEMb) the participants. RESULTS The data shows that the opto jump allows a repeatable measurement of flight time (FT) with an average ICC of 95%. The percentage of mean variance due to the tests (4%) was found to be greater with respect to the mean variance between days (2%). The SEMw was 1%, while the SEMb was 3%. DISCUSSION/CONCLUSION The FTs in each test, with ICC value, were greater than 90%. Furthermore the results confirm not only the high level of repeatability of the measurements but also that the observed differences were mainly due to individual differences between the participants.
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