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Thomas Ball, Debra Bemben, Michael Bemben and Denise Smith

Edited by Scott B. Going

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Thomas Ball, Debra Bemben, Michael Bemben and Denise Smith

Edited by Scott B. Going

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Debra Bemben, Michael Bemben, Denise Smith and Daniel Williams

Edited by Scott B. Going

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Daniel Williams, Wayne Phillips, Roy Oman, Michael Bemben and Debra Bemben

Edited by Scott B. Going

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Daniel Williams, Wayne Phillips, Roy Oman, Michael Bemben and Debra Bemben

Edited by Scott B. Going

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Debra Bemben, Michael Bemben, Roy Oman, Wayne Phillips and Daniel Williams

Edited by Scott B. Going

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Debra Bemben, Michael Bemben, Roy Oman, Wayne Phillips and Daniel Williams

Edited by Scott B. Going

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Debra Bemben, Michael Bemben, Scott Going, Roy Oman, Denise Smith and Dan Williams

Edited by Scott B. Going

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Michael J. Hartman, Brandon Clark, Debra A. Bemben, J. Lon Kilgore and Michael G. Bemben

Context:

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.