In comparison to the placebo drink , the ingestion of the caffeinated energy drink increased the ball velocity in the standing spike ( 19.2 2.1 vs 19.7 1.9 ms , P = 0.023 ) and in the jumping spike ( 17.9 2.2 vs 18.8 2.2 ms , P = 0.038 ) and the jump height in the squat jump ( 28.1 3.2 vs 29.4 3.6 cm , P = 0.028 ) , countermovement jump ( 32.0 4.6 vs 33.1 4.5 cm , P = 0.018 ) , spike jump ( 43.3 4.7 vs 44.4 5.0 cm , P = 0.025 ) , and block jump ( 35.2 5.1 vs 36.1 5.1 cm , P = 0.044 ) .