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A comparison between free-weight and isokinetic bench pressing
Medicine and Science in Sports and Exercise
|June 1, 1985
Summary
This study compared free-weight and isokinetic bench press performance, finding similar "sticking regions" but varying isokinetic percentages across speeds. These findings suggest an ideal lifting technique.
Area of Science:
- Biomechanics
- Exercise Physiology
Background:
- Understanding bench press performance is crucial for training and injury prevention.
- Differentiating between free-weight and isokinetic movements aids in technique optimization.
Purpose of the Study:
- To evaluate performance parameters of free-weight and isokinetic bench presses.
- To clarify technique requirements for a successful bench press lift.
Main Methods:
- Cinematographic analysis (150 fps) of free-weight bench press at 90% and 75% of one-repetition maximum (1RM).
- Isokinetic data collection using a Cybex Power Bench Press at varying speeds (0.47 rad·s⁻¹ and 1.74 rad·s⁻¹).
Main Results:
- No significant difference in the relative time of the
- sticking region
- between 90% and 75% 1RM free-weight bench presses.
- Isokinetic percentage decreased with increased speed on the Cybex device (70% at 0.47 rad·s⁻¹ to 50% at 1.74 rad·s⁻¹).
Conclusions:
- Accommodation occurred in both maximal free-weight and isokinetic lifts.
- Force-time data and anatomical factors suggest an optimal bench press technique.