| Both repeated sprint and aerobic interval training do improve performance during intense intermittent exercise during the season |
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After the pre-season, forty-two elite, junior soccer players underwent in a 7-wk period twice a week either an intense aerobic interval (ITG; 4 x 4 min running at 90-95% HRmax, 3 min rest; n=21) or a repeated sprint training (STG; 3 x 6 maximal shuttle sprints of 40 m, n=21) session.
Both groups improved performance in the Yo-Yo IR test with the improvement being greater in STG (28%) than in ITG (13%). The mean time during a repeated sprint test decreased only in the STG (2%). Maximum oxygen uptake and ventilatory threshold increased by 6 and 4%, respectively, with no differences between groups. No changes were observed in neither jump nor single sprint performance. Recommendations: Both aerobic and repeated speed training can be used during the season to improve performance. Bravo DF, Impellizzeri FM, Rampinini E, Castagna C, Bishop D, Wisloff U.
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