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J Sport Rehabil. 2012 Aug;21(3):266-72. Epub 2012 Jun 18.

Shoulder- and back-muscle activation during shoulder abduction and flexion using a Bodyblade Pro versus dumbbells.

Author information

1
Dept of Athletics-Sports Medicine, University of San Diego, San Diego, CA, USA.

Abstract

CONTEXT:

The Bodyblade Pro is used for shoulder rehabilitation after injury. Resistance is provided by blade Oscillations-faster oscillations or higher speeds correspond to greater resistance. However, research supporting the Bodyblade Pro's use is scarce, particularly in comparison with dumbbell training.

OBJECTIVE:

To compare muscle activity, using electromyography (EMG), in the back and shoulder regions during shoulder exercises with the Bodyblade Pro vs dumbbells.

DESIGN:

Randomized crossover study.

SETTING:

San Diego State University biomechanics laboratory.

PARTICIPANTS:

11 healthy male subjects age 19-32 y.

INTERVENTION:

Subjects performed shoulder-flexion and -abduction exercises using a Bodyblade Pro and dumbbells (5, 8, and 10 lb) while EMG recorded activity of the deltoid, pectoralis major, infraspinatus, serratus anterior, and erector spinae.

MAIN OUTCOME MEASURES:

Average peak muscle activity (% maximum voluntary isometric contraction) was separately measured for shoulder abduction and flexion in the range of 85° to 95°. Differences among exercise devices were separately analyzed for the flexed and abducted positions using 1-way repeated-measures ANOVA.

RESULTS:

The Bodyblade Pro produced greater muscle activity than all the dumbbell trials. Differences were significant for all muscles measured (all P < .01) except for the erector spinae during shoulder flexion with a 10-lb dumbbell. EMG activity for the Bodyblade Pro exceeded 50% of the MVIC during both shoulder flexion and abduction. For the dumbbell conditions, only the 10-lb trials approached this effect.

CONCLUSIONS:

Using a Bodyblade during shoulder exercises results in greater shoulder- and back-muscle recruitment than dumbbells. The Bodyblade Pro can activate multiple muscles in a single exercise and thereby minimize the need for multiple dumbbell exercises. The Bodyblade Pro is an effective device for shoulder- and back-muscle activation that warrants further use by clinicians interested in its use for rehabilitation.

PMID:
22713233
[Indexed for MEDLINE]
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