Contrast Loading Increases Upper Body Power Output in Junior Volleyball Athletes.
This study examined the acute effects of contrast loading on mechanical power output during bench-press throws in junior volleyball players.



Eleven males (age: 16.5 ± 0.5 years) performed a contrast loading and a control protocol. The contrast protocol included the execution of 3 bench-throws with a 30% load of 1RM, after 3 min a conditioning set of 5 bench-throws with a 60% load of 1RM and after 3 and 5 min two more sets of 3 bench-throws with a 30% load of 1RM. The control protocol included the execution of 3 sets of 3 bench-throws with a 30% load of 1RM at the same time points as in the contrast protocol without the execution of the conditioning set.



Mechanical power with a 30% load was higher (p < .05) 3 and 5 min following the conditioning set at the contrast protocol compared with the control protocol (8.7 ± 7.5 and 10.4 ± 3.4%, respectively). High correlations (p < .05) were obtained between participant's relative maximal strength (r = .87) and power (r = .82) and the increases in power output.



Contrast loading increases upper body power output produced with a light load by junior athletes. The potential for increased upper body performance is more evident in stronger or more powerful individuals.
1 Democritus University of Thrace.
Ilias
I
Smilios
1 Democritus University of Thrace.
Konstantinos
K
Sotiropoulos
2 National and Kapodistrian University of Athens.
Karolina
K
Barzouka
3 University of Nicosia.
Marios
M
Christou
1 Democritus University of Thrace.
Savvas P
SP
Tokmakidis
D000293:Adolescent; D056352:Athletes; D018592:Cross-Over Studies; D006801:Humans; D008297:Male; D053580:Muscle Strength; D034941:Upper Extremity / Q000502:physiology*; D054798:Volleyball; D014891:Weight Lifting
bench press; muscular performance; post activation potentiation