Validity of the Myotest® in Measuring Force and Power Production in the Squat and Bench Press

• Autores: Brett A. Comstock, Glenn F. Jr Solomon-Hill, Shawn D. Flanagan, Jacob E. Earp, Hui-Ying Luk, Kathryn A. Dobbins, Courtenay Dunn-Lewis, Maren S. Fragala, Jen-Yu Ho, Disa L. Hatfield, Jakob L. Vingren, Craig R. Denegar, Jeff S. Volek, Brian R. Kupchak, Carl M. Maresh, William J. Kraemer
• Localización: Journal of strength and conditioning research: the research journal of the NSCA, ISSN 1064-8011, Vol. 25, Nº. 8, 2011, págs. 2293-2297
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Dialnet Métricas: 3 Citas
• Resumen

  • The purpose of this study was to verify the concurrent validity of a bar-mounted Myotest® instrument in measuring the force and power production in the squat and bench press exercises when compared to the gold standard of a computerized linear transducer and force platform system. Fifty-four men (bench press: 39-171 kg; squat: 75-221 kg) and 43 women (bench press: 18-80 kg; squat: 30-115 kg) (age range 18-30 years) performed a 1 repetition maximum (1RM) strength test in bench press and squat exercises. Power testing consisted of the jump squat and the bench throw at 30% of each subject's 1RM. During each measurement, both the Myotest® instrument and the Celesco linear transducer of the directly interfaced BMS system (Ballistic Measurement System [BMS] Innervations Inc, Fitness Technology force plate, Skye, South Australia, Australia) were mounted to the weight bar. A strong, positive correlation (r) between the Myotest and BMS systems and a high correlation of determination (R2) was demonstrated for bench throw force (r = 0.95, p < 0.05) (R2 = 0.92); bench throw power (r = 0.96, p < 0.05) (R2 = 0.93); squat jump force (r = 0.98, p < 0.05) (R2 = 0.97); and squat jump power (r = 0.91, p < 0.05) (R2 = 0.82). In conclusion, when fixed on the bar in the vertical axis, the Myotest is a valid field instrument for measuring force and power in commonly used exercise movements.