Caffeine intake increases countermovement jump performance in well-trained high jumpers

Caffeine Improves Sprint Time in Simulated Freestyle Swimming Competition but Not the Vertical Jump in Female Swimmers

“…Similarly, acute CAF ingestion at low to moderate doses (2-4-6 mg/kg) in recreationally active males increased VJ performance [48]. Moreover, 5 mg/kg of CAF intake enhanced jump performance in elite male and female jumpers [54]. In volleyball players, 6 mg/kg of CAF ingestion increased CMJ height significantly [55], in addition to caffeinated chewing gum with 6.4 mg/kg CAF, which was effective in improving sport-specific jump performance [56].…”

“…Collectively, the lack of ergogenic effect of CAF in jump performance may be attributed to the low specificity of the dryland modalities, which may not have been transferred to the jump performance, although it seems to provide improvement in swimming performance. In fact, previous studies indicated an improvement in jump performance, and such studies enrolled several experimental groups including trained volleyball players [55,56,59], active males with resistance training [48,52], well-trained high jumpers [54], soccer players [57], collegiate athletes [58], and elite Brazilian Jiu-Jitsu athletes [20]. Given the fact that the dryland nature of both team and individual sports comprises speed, repeated sprint ability, agility, balance, muscular strength, acceleration, jumping, and explosive power, the ergogenic effect of the CAF in these studies may have resulted from participants' responsiveness to the tests identical to the movement patterns and biomechanical demands in their sports.…”