Analysis of Pushing Exercises: Muscle Activity and Spine Load While Contrasting Techniques on Stable Surfaces With a Labile Suspension Strap Training System
ABSTRACTMcGill, SM, Cannon, J, and Andersen, JT. Analysis of pushing exercisesMuscle activity and spine load while contrasting techniques on stable surfaces with a labile suspension strap training system. J Strength Cond Res 28(1)105–116, 2014—Labile surfaces in the form of suspension straps are inc...
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Veröffentlicht in: | Journal of strength and conditioning research 2014-01, Vol.28 (1), p.105-116 |
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Zusammenfassung: | ABSTRACTMcGill, SM, Cannon, J, and Andersen, JT. Analysis of pushing exercisesMuscle activity and spine load while contrasting techniques on stable surfaces with a labile suspension strap training system. J Strength Cond Res 28(1)105–116, 2014—Labile surfaces in the form of suspension straps are increasingly being used as a tool in resistance training programs. Pushing is a common functional activity of daily living and inherently part of a well-rounded training program. This study examined pushing exercises performed on stable surfaces and unstable suspension straps, specifically muscle activation levels and spine loads were quantified together with the influence of employing technique coaching. There were several main questions that this study sought to answerWhich exercises challenged particular muscles? What was the magnitude of the resulting spine load? How did stable and unstable surfaces differ? Did coaching influence the results? Fourteen men were recruited as part of a convenience sample (mean age, 21.1 ± 2.0 years; height, 1.77 ± 0.06 m; mean weight, 74.6 ± 7.8 kg). Data were processed and input to a sophisticated and anatomically detailed 3D model that used muscle activity and body segment kinematics to estimate muscle force—in this way, the model was sensitive to the individuals choice of motor control for each task; muscle forces and linked segment joint loads were used to calculate spine loads. Exercises were performed using stable surfaces for hand/feet contact and repeated where possible with labile suspension straps. Speed of movement was standardized across participants with the use of a metronome for each exercise. There were gradations of muscle activity and spine load characteristics to every task. In general, the instability associated with the labile exercises required greater torso muscle activity than when performed on stable surfaces. Throughout the duration of an exercise, there was a range of compression; the TRX push-up ranged from 1,653 to 2,128.14 N, whereas the standard push-up had a range from 1,233.75 to 1,530.06 N. There was no significant effect of exercise on spine compression (F(4,60) = 0.86, p = 0.495). Interestingly, a standard push-up showed significantly greater shear than TRX angle 1 (p = 0.02), angle 2 (p = 0.01), and angle 3 (p = 0.02). As with any training program for the elite or recreational athlete alike, specific exercises and programs should reflect oneʼs injury history, capabilities, limitations, and trai |
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ISSN: | 1064-8011 1533-4287 |
DOI: | 10.1519/JSC.0b013e3182a99459 |