Comparisons between twice-daily and once-daily training sessions in male weight lifters
(Vergleiche zwischen zwei und einer täglichen Traingseinheit bei männlichen Gewichtheber)
Many elite athletes use increased daily training frequencies as a means to increase training load without substantial published literature to support this practice. Purpose: To compare the physiological responses to twice- and once-daily training sessions with similar training volumes. Methods: Ten nationally competitive male weightlifters (age 20.5 ± 1.2 y, body mass 92.9 ± 23.6 kg, training history 5.5 ± 1.5 y) were matched on body mass and training experience, then randomly assigned to train either once or twice daily for 3 wk. Isometric knee-extension strength (ISO), muscle cross-sectional area, vertical-jump peak power, resting hormone concentrations, neuromuscular activation (EMG), and weightlifting performance were obtained before and after the experimental training period. Results: All dependent measures before the training intervention were similar for both groups. A 2-way repeated-measures ANOVA did not reveal any significant main effects (group or trial) or interaction effects (group × trial) for any of the dependent variables. There were also no significant group differences when parameters were expressed as percentage change, but the twice-daily training group had a greater percentage change in ISO (+5.1% vs +3.2%), EMG (+20.3% vs +9.1%), testosterone (+10.5% vs +6.4%), and testosterone:cortisol ratio (-10.5% vs +1.3%) than did the once-daily training group. Conclusions: There were no additional benefits from increased daily training frequency in national-level male weightlifters, but the increase in ISO and EMG activity for the twice-daily group might provide some rationale for dividing training load in an attempt to reduce the risk of overtraining.
© Copyright 2007 International Journal of Sports Physiology and Performance. Alle Rechte vorbehalten.
Schlagworte: | Gewichtheben Trainingsplanung Belastungsumfang Belastungsintensität EMG Hormon Kraft Knie Leistung Schnellkraft |
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Notationen: | Kraft-Schnellkraft-Sportarten Trainingswissenschaft |
DOI: | 10.1123/ijspp.2.2.159 |
Veröffentlicht in: | International Journal of Sports Physiology and Performance |
Veröffentlicht: |
2007
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Jahrgang: | 2 |
Heft: | 2 |
Seiten: | 159-169 |
Dokumentenarten: | Artikel |
Sprache: | Englisch |
Level: | hoch |