n International SportMed Journal - Effects of consecutive 7-day high- versus moderate-intensity training on endurance determinants and muscle damage in basketball players : original research article
|Article Title||Effects of consecutive 7-day high- versus moderate-intensity training on endurance determinants and muscle damage in basketball players : original research article|
|© Publisher:||International Federation of Sports Medicine|
|Journal||International SportMed Journal|
|Affiliations||1 National Taiwan Sport University, Taiwan, 2 National Taiwan Sport University, Taiwan, 3 National Taiwan Sport University, Taiwan, 4 Shih Hsin University, Taiwan and 5 Shih Hsin University, Taiwan|
|Publication Date||Jan 2012|
|Pages||18 - 28|
|Keyword(s)||Creatine kinase, Endurance, High-intensity interval training, Lactate threshold and Running economy|
Background: High-intensity interval training (HIT) on VO2peak, peak aerobic power output and 5km time trial performance was suggested to be an efficient training strategy, and consecutive 3-day per week training for 3 weeks could provide similar training effects with non-consecutive days. The effects of consecutive 7-day HIT is still not clear. Research question: To compare the consecutive 7-day training effects of HIT versus moderate-intensity continuous training (MCT), matched for training distance, on the endurance parameters of velocity of 4mmol·L-1 lactate threshold (4-LT), running economies (REs), maximal oxygen uptake (VO2max), velocity associated with VO2max (vVO2max) and plasma activity of creatine kinase (CK) in young basketball players. Type of study: Randomised experimental research was used. Methods: Eighteen male basketball players were randomly divided into HIT (n = 10) or MCT group (n = 8). Subjects conducted consecutive 7-days of treadmill training performing either HIT (7 repetitions, 2-min bouts at 90% VO2max, 1-min rest intervals) or MCT (continuous, 20.8 ± 1.0 min at 65% VO2max). Pre- and post-training, the 4-LT, REs at fixed speed of 2.0, 2.5 and 3.0 m·s-1, VO2max, vVO2max, and CK activity of subjects were measured. Results: After training, the HIT group significantly improved 4-LT (3.2 ± 0.4 to 3.5 ± 0.5 m·s-1, P < 0.05), REs (10.4-11.5%, P < 0.05), and vVO2max (4.1 ± 0.5 to 4.5 ± 0.8 m·s-1, P < 0.05). The HIT group also showed significant increase in the activity of CK (148.1 ± 47.3 to 302.6 ± 68.2 U·L-1, P < 0.05). Conclusions: When training volume is matched, consecutive 7-day of HIT is more efficient than MCT for improving endurance determinants and has small extent of muscle damage for basketball players.
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