title: A caffeinated energy drink improves jump performance in adolescent basketball players.
abstract: This study aimed at investigating the effects of a commercially available energy drink on shooting precision, jump performance and endurance capacity in young basketball players. Sixteen young basketball players (first division of a junior national league; 14.9 ± 0.8 years; 73.4 ± 12.4 kg; 182.3 ± 6.5 cm) volunteered to participate in the research. They ingested either (a) an energy drink that contained 3 mg of caffeine per kg of body weight or (b) a placebo energy drink with the same appearance and taste. After 60 min for caffeine absorption, they performed free throw shooting and three-point shooting tests. After that, participants performed a maximal countermovement jump (CMJ), a repeated maximal jumps test for 15 s (RJ-15), and the Yo-Yo intermittent recovery test level 1 (Yo-Yo IR1). Urine samples were obtained before and 30 min after testing. In comparison to the placebo, the ingestion of the caffeinated energy drink did not affect precision during the free throws (Caffeine = 70.7 ± 11.8 % vs placebo = 70.3 ± 11.0 %; P = 0.45), the three-point shooting test (39.9 ± 11.8 vs 38.1 ± 12.8 %; P = 0.33) or the distance covered in the Yo-Yo IR1 (2,000 ± 706 vs 1,925 ± 702 m; P = 0.19). However, the energy drink significantly increased jump height during the CMJ (38.3 ± 4.4 vs 37.5 ± 4.4 cm; P < 0.05) mean jump height during the RJ-15 (30.2 ± 3.6 vs 28.8 ± 3.4 cm; P < 0.05) and the excretion of urinary caffeine (1.2 ± 0.7 vs 0.1 ± 0.1 μg/mL; P < 0.05). The intake of a caffeine-containing energy drink (3 mg/kg body weight) increased jump performance although it did not affect basketball shooting precision.
authors.affiliation: Exercise Physiology Laboratory, Sport Science Institute, Camilo José Cela University, C/Castillo de Alarcon, 49. Villafranca del Castillo, 28692, Madrid, Spain, jabian@ucjc.edu.
authors.forename: Javier
authors.initials: J
authors.lastname: Abian-Vicen
authors.forename: Carlos
authors.initials: C
authors.lastname: Puente
authors.forename: Juan José
authors.initials: JJ
authors.lastname: Salinero
authors.forename: Cristina
authors.initials: C
authors.lastname: González-Millán
authors.forename: Francisco
authors.initials: F
authors.lastname: Areces
authors.forename: Gloria
authors.initials: G
authors.lastname: Muñoz
authors.forename: Jesús
authors.initials: J
authors.lastname: Muñoz-Guerra
authors.forename: Juan
authors.initials: J
authors.lastname: Del Coso
mesh_terms: D000293:Adolescent; D056352:Athletes; D054874:Athletic Performance; D001490:Basketball; D002110:Caffeine / Q000032:analysis / Q000378:metabolism*; D061215:Energy Drinks / Q000032:analysis*; D006801:Humans; D008297:Male; D010807:Physical Endurance
chemical_list: D002110:Caffeine