The purpose of this study was to evaluate the effect of acute caffeine ingestion on the maximal accumulated oxygen deficit (MAOD) and short-term running performance. Nine well-trained males performed a preliminary assessment and. at least 4 days later, a supramaximal run to exhaustion. Their VO2max values were determined, and the MAOD test at an exercise intensity equivalent to 125% VO2max was performed. Caffeine (5 mg ⋅ kg−1) or placebo was administered 1 hr prior to the MAOD in a double-blind, randomized cross-over study. In comparison to the placebo condition, subjects in the caffeine condition developed a significantly greater MAOD and increased their run lime to exhaustion. However, posl-MAOD blood lactate concentration ([HLa]) was not different between trials for caffeine and placebo. Caffeine ingestion can be an effective ergogenic aid for short-term, supramaximal running performance and can increase MAOD. However, these results do not appear to be related to an increased [HLa).
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The Effects of Caffeine on the Maximal Accumulated Oxygen Deficit and Short-Term Running Performance
Michael Doherty
Performance Enhancement in Motocross: A Case Study of the Sport Science Team in Action
David Collins, Michael Doherty, and Steven Talbot
Using an exemplar case study of an intervention completed in the sport of motocross, the authors attempt to demonstrate the advantages inherent in using integrated multidisciplinary approaches in the application of sport sciences to performance enhancement. The need for comprehensive, detailed, and well-planned interventions, which of necessity take time to both set up and implement, is also highlighted. In addition, the authors furnish examples of practical techniques that can be used to facilitate cognitive behavioral strategies in this type of sport. Implications for the preparation and training of applied sport psychology consultants are briefly discussed.
