Purpose: To examine the effect of caffeine supplementation on dribbling speed in elite female and male basketball players. Methods: A double-blind, counterbalanced, randomized, crossover design was used. Elite basketball players (N = 21; 10 female, 11 male; age 18.3 [3.3] y) completed placebo (3 mg·kg−1 of body mass of dextrose) and caffeine (3 mg·kg−1 of body mass) trials 1 wk apart during the in-season phase. During each trial, players completed 20-m linear sprints with and without dribbling a basketball. Performance times were recorded at 5-, 10-, and 20-m splits. Dribbling speed was measured using traditional (total performance time) and novel (dribble deficit) methods. Dribble deficit isolates the added time taken to complete a task when dribbling compared with a nondribbling version of the same task. Comparisons between placebo and caffeine conditions were conducted at group and individual levels. Results: Nonsignificant (P > .05), trivial to small (effect size = 0.04–0.42) differences in dribbling speed were observed between conditions. The majority (20 out of 21) of players were classified as nonresponders to caffeine, with 1 player identified as a negative responder using dribble-deficit measures. Conclusions: Results indicate that caffeine offers no ergogenic benefit to dribbling speed in elite basketball players. The negative response to caffeine in 1 player indicates that caffeine supplementation may be detrimental to dribbling speed in specific cases and emphasizes the need for individualized analyses in nutrition-based sport-science research.
Scanlan and Dalbo are with the Human Exercise and Training Laboratory, Central Queensland University, Rockhampton, Australia. Conte is with the Inst of Sport Science and Innovations, Lithuanian Sports University, Kaunas, Lithuania. Stojanović, Stojiljković, Stanković, Antić, and Milanović are with the Faculty of Sport and Physical Education, University of Niš, Niš, Serbia. Milanović is also with the Koper Science and Research Center, Inst for Kinesiology Research, Koper, Slovenia.
ScanlanADascombeBReaburnP. A comparison of the activity demands of elite and sub-elite Australian men’s basketball competition. J Sports Sci. 2011;29(11):1153–1160. PubMed ID: 21777151 doi:10.1080/02640414.2011.582509
ScanlanA, DascombeB, ReaburnP. A comparison of the activity demands of elite and sub-elite Australian men’s basketball competition. . 2011;29(11):1153–1160. PubMed ID: 21777151 doi:10.1080/02640414.2011.58250910.1080/02640414.2011.58250921777151)| false
ConteDFaveroTGNiederhausenMCapranicaLTessitoreA. Determinants of the effectiveness of fast break actions in elite and sub-elite Italian men’s basketball games. Biol Sport. 2017;2(2):177–183. PubMed ID: 28566812 doi:10.5114/biolsport.2017.65337
ConteD, FaveroTG, NiederhausenM, CapranicaL, TessitoreA. Determinants of the effectiveness of fast break actions in elite and sub-elite Italian men’s basketball games. . 2017;2(2):177–183. PubMed ID: 28566812 doi:10.5114/biolsport.2017.6533710.5114/biolsport.2017.65337)| false
GoldsteinE, ZiegenfussT, KalmanD, et al. International society of sports nutrition position stand: caffeine and performance. . 2010;7(1):5. PubMed ID: 20205813 doi:10.1186/1550-2783-7-510.1186/1550-2783-7-520205813)| false
FoskettAAliAGantN. Caffeine enhances cognitive function and skill performance during simulated soccer activity. Int J Sport Nutr Exerc Metab. 2009;19(4):410–423. PubMed ID: 19827465 doi:10.1123/ijsnem.19.4.410
SökmenB, ArmstrongL, KraemerW, et al. Caffeine use in sports: considerations for the athlete. . 2008;22(3):978–986. PubMed ID: 18438212 doi:10.1519/JSC.0b013e3181660cec10.1519/JSC.0b013e3181660cec18438212)| false
HopkinsWMarshallSBatterhamAHaninJ. Progressive statistics for studies in sports medicine and exercise science. Med Sci Sports Exerc. 2009;41(1):3–13. PubMed ID: 19092709 doi:10.1249/MSS.0b013e31818cb278
SwintonPHemingwayBSaundersBGualanoBDolanE. A statistical framework to interpret individual response to intervention: Paving the way for personalized nutrition and exercise prescription. Front Nutr. 2018;5(41):1–14. PubMed ID: 29892599 doi:10.3389/fnut.2018.00041
SwintonP, HemingwayB, SaundersB, GualanoB, DolanE. A statistical framework to interpret individual response to intervention: Paving the way for personalized nutrition and exercise prescription. . 2018;5(41):1–14. PubMed ID: 29892599 doi:10.3389/fnut.2018.0004110.3389/fnut.2018.00041)| false
PickeringCKielyJ. Are the current guidelines on caffeine use in sport optimal for everyone? Inter-individual variation in caffeine ergogenicity, and a move towards personalised sports nutrition. Sports Med. 2018;48(1):7–16. PubMed ID: 28853006 doi:10.1007/s40279-017-0776-1
PickeringC, KielyJ. Are the current guidelines on caffeine use in sport optimal for everyone? Inter-individual variation in caffeine ergogenicity, and a move towards personalised sports nutrition. . 2018;48(1):7–16. PubMed ID: 28853006 doi:10.1007/s40279-017-0776-110.1007/s40279-017-0776-1)| false