Mechanisms Affecting Bench Press Throw Performance while Using a Counter-Balanced Smith Machine

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The use of a counter-balance weight system of a Smith machine affects measures of bench press throw performance. Twenty-four men performed bench press throws at 30% of their one-repetition maximum under four different conditions: 1) counter-balance and rebound movement (RC), 2) no counter-balance and rebound movement (RNC), 3) counter-balance and concentric only movement (CC), and 4) no counter-balance and concentric only movement (CNC). Peak power, force, and concentric and eccentric velocities were measured using a linear accelerometer; and peak ground reaction force (GRF) was measured using a forceplate. Peak measures for concentric and eccentric velocities showed that NCB> CB and ... continued below

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Buddhadev, Harsh May 2011.

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  • Buddhadev, Harsh

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The use of a counter-balance weight system of a Smith machine affects measures of bench press throw performance. Twenty-four men performed bench press throws at 30% of their one-repetition maximum under four different conditions: 1) counter-balance and rebound movement (RC), 2) no counter-balance and rebound movement (RNC), 3) counter-balance and concentric only movement (CC), and 4) no counter-balance and concentric only movement (CNC). Peak power, force, and concentric and eccentric velocities were measured using a linear accelerometer; and peak ground reaction force (GRF) was measured using a forceplate. Peak measures for concentric and eccentric velocities showed that NCB> CB and RBT > CBT. Peak GRF measures showed CB > NCB and RBT > CBT. The lower performance measures for CB were likely due to an increase in the net external load when the barbell accelerates faster than the gravitational constant causing the counter-balance weight becomes ineffective.

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  • May 2011

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  • Jan. 9, 2012, 9:53 p.m.

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Buddhadev, Harsh. Mechanisms Affecting Bench Press Throw Performance while Using a Counter-Balanced Smith Machine, thesis, May 2011; Denton, Texas. (digital.library.unt.edu/ark:/67531/metadc67963/: accessed May 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .