title: Validity of the Myotest® in measuring force and power production in the squat and bench press.
abstract: 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.
authors: Department of Kinesiology, University of Connecticut, Storrs, Connecticut, USA.
authors: Brett A
authors: BA
authors: Comstock
authors: Glenn
authors: G
authors: Solomon-Hill
authors: Shawn D
authors: SD
authors: Flanagan
authors: Jacob E
authors: JE
authors: Earp
authors: Hui-Ying
authors: HY
authors: Luk
authors: Kathryn A
authors: KA
authors: Dobbins
authors: Courtenay
authors: C
authors: Dunn-Lewis
authors: Maren S
authors: MS
authors: Fragala
authors: Jen-Yu
authors: JY
authors: Ho
authors: Disa L
authors: DL
authors: Hatfield
authors: Jakob L
authors: JL
authors: Vingren
authors: Craig R
authors: CR
authors: Denegar
authors: Jeff S
authors: JS
authors: Volek
authors: Brian R
authors: BR
authors: Kupchak
authors: Carl M
authors: CM
authors: Maresh
authors: William J
authors: WJ
authors: Kraemer
mesh_terms: D000293:Adolescent; D000328:Adult; D005080:Exercise Test / Q000295:instrumentation*; D005260:Female; D006801:Humans; D008297:Male; D053580:Muscle Strength / Q000502:physiology*; D018482:Muscle, Skeletal / Q000502:physiology*; D015203:Reproducibility of Results; D055070:Resistance Training; D014891:Weight Lifting / Q000502:physiology*; D055815:Young Adult