Isokinetic Dynamometry
Isokinetic dynamometry measures muscular strength and power production during movement at a constant, preset velocity. Pioneered by Hislop and Perrine (1967), isokinetic testing constrains limb velocity to a fixed speed (e.g., 60°/s or 120°/s), while the dynamometer adjusts resistance to match the subject's force production at each instant, accommodating all variations in force throughout the range of motion. This approach provides comprehensive strength profiling across a full joint range and allows comparison of concentric and eccentric contractions. Isokinetic testing is widely used in clinical rehabilitation, sports medicine, and research due to its objectivity and standardization.
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- Hislop, H. J., & Perrine, J. J. (1967). The isokinetic concept of exercise. Physical Therapy, 47(2), 114-117. · DOI 10.1093/ptj/47.2.114
- Perrin, D. H. (1993). Isokinetic Exercise and Assessment. Human Kinetics Publishers. · URL
- Keating, J. L., & Matyas, T. A. (2001). Unreliability of knee strength measures and the influence of factors that may affect assessment. Journal of Orthopaedic & Sports Physical Therapy, 31(10), 546-556. · URL
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