engleski

Improving repeated sprint ability: Repeated sprint vs shuttle repeated sprint training

Repeated sprint ability (RSA) is an important fitness requirement for team sport athletes which can be improved through repeated sprint training (RST). Repeated shuttle sprints (RSS) seem to elicit greater physiological response in comparison to repeated sprints (RS) without change of direction. Whether this grater acute physiological response to RSS would result in greater training adaptations and whether these possible differences in training adaptations would lead to developing specific aspects of RSA needs to be investigated. PURPOSE: To determine the differences in training effects between RSS and RS training protocols. METHODS: Thirty nine male physical education students (19, 6 ± 0, 8 yrs) were divided into RS (n=20) and RSS (n=19) training groups and performed 18 training sessions in 6 weeks. RS training program consisted of 2-3 × 6-10 × 20m straight line RS, departing every 25 s, while RSS training consisted of RSS (10+10m) performed in the same training volume. Performance was assessed by 25 m sprint time (25 m), countermovement jump (CMJ), 20 m shuttle test (20 mST), incremental running test (VO2max) and time to exhaustion at vVO2max running test (tlim). For assessing repeated shuttle sprint ability (RSSA) and RSA subjects performed 6 repetitions of maximal 25m sprints with (2 × 12, 5m) and without change of direction, departing every 25 s. The best sprint time (RSAb/RSSAb) and mean sprint time (RSAm/RSSAm) were calculated for both tests. A two way ANOVA with repeated measures and Pearson correlation coefficient were used for statistical analysis. RESULTS: RS and RSS group significantly (p≤0, 05) improved in VO2max (5, 1% vs 5%), 25 m (2, 1% vs 1, 7%), CMJ (4, 5 vs 3, 8%) and 20 mST (4, 2% vs 4, 2%), RSAb (3, 3% vs 4, 8%), RSAm (3, 7% vs 4, 6%), RSSAb (3, 2% vs 4, 6%) and RSSAm (2, 6% vs 4, 3%), but no significant differences in changes were observed. RSS training induced significantly greater improvements in tlim (-4, 4% vs 15, 3%). Correlation coefficient between RSAm and RSSAm decreased from 0, 74 to 0, 68. CONCLUSION: Both RS training protocols are equally efficient in improving VO2max, speed, jumping power, agility and both aspects of RSA. RSS training protocol induced greater adaptations in aerobic endurance. Mean sprinting time exists as a specific quality (r<0, 71), so different RST protocols can induce specific changes in RSA.

sprint ; training

Sažetak sa skupa 62nd Annual Meeting of American College of Sports Medicine objavljen je u supplementu časopisa Medicine & Science in Sports & Exercise.