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Test-Retest Reliability of a Commercial Linear Position Transducer (GymAware PowerTool) to Measure Velocity and Power in the Back Squat and Bench Press.
J Strength Cond Res. 2020 Mar; 34(3):728-737.JS

Abstract

Orange, ST, Metcalfe, JW, Marshall, P, Vince, RV, Madden, LA, and Liefeith, A. Test-retest reliability of a commercial linear position transducer (GymAware PowerTool) to measure velocity and power in the back squat and bench press. J Strength Cond Res 34(3): 728-737, 2020-This study examined the test-retest reliability of the GymAware PowerTool (GYM) to measure velocity and power in the free-weight back squat and bench press. Twenty-nine academy rugby league players (age: 17.6 ± 1.0 years; body mass: 87.3 ± 20.8 kg) completed 2 test-retest sessions for the back squat followed by 2 test-retest sessions for the bench press. GYM measured mean velocity (MV), peak velocity (PV), mean power (MP), and peak power at 20, 40, 60, 80, and 90% of 1 repetition maximum (1RM). GYM showed good reliability (intraclass correlation coefficient [ICC] and standard error of measurement percentage, respectively) for the measurement of MV at loads of 40 (0.77, 3.9%), 60 (0.83, 4.8%), 80 (0.83, 5.8%), and 90% (0.79, 7.9%) of 1RM in the back squat. In the bench press, good reliability was evident for PV at 40 (0.82, 3.9%), 60 (0.81, 5.1%), and 80% (0.77, 8.4%) of 1RM, and for MV at 80 (0.78, 7.9%) and 90% (0.87, 9.9%) of 1RM. The measurement of MP showed good to excellent levels of reliability across all relative loads (ICC ≥0.75). In conclusion, GYM provides practitioners with reliable kinematic information in the back squat and bench press, at least with loads of 40-90% of 1RM. This suggests that strength and conditioning coaches can use the velocity data to regulate training load according to daily readiness and target specific components of the force-velocity curve. However, caution should be taken when measuring movement velocity at loads <40% of 1RM.

Authors+Show Affiliations

Sport, Health and Exercise Science, School of Life Sciences, University of Hull, Hull, United Kingdom. School of Sport, York St John University, York, United Kingdom; and.Sport, Health and Exercise Science, School of Life Sciences, University of Hull, Hull, United Kingdom. School of Sport, York St John University, York, United Kingdom; and.Sport, Health and Exercise Science, School of Life Sciences, University of Hull, Hull, United Kingdom.Sport, Health and Exercise Science, School of Life Sciences, University of Hull, Hull, United Kingdom.Center of Biomedical Research, School of Life Sciences, University of Hull, Hull, United Kingdom.School of Sport, York St John University, York, United Kingdom; and.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

29952868

Citation

Orange, Samuel T., et al. "Test-Retest Reliability of a Commercial Linear Position Transducer (GymAware PowerTool) to Measure Velocity and Power in the Back Squat and Bench Press." Journal of Strength and Conditioning Research, vol. 34, no. 3, 2020, pp. 728-737.
Orange ST, Metcalfe JW, Marshall P, et al. Test-Retest Reliability of a Commercial Linear Position Transducer (GymAware PowerTool) to Measure Velocity and Power in the Back Squat and Bench Press. J Strength Cond Res. 2020;34(3):728-737.
Orange, S. T., Metcalfe, J. W., Marshall, P., Vince, R. V., Madden, L. A., & Liefeith, A. (2020). Test-Retest Reliability of a Commercial Linear Position Transducer (GymAware PowerTool) to Measure Velocity and Power in the Back Squat and Bench Press. Journal of Strength and Conditioning Research, 34(3), 728-737. https://doi.org/10.1519/JSC.0000000000002715
Orange ST, et al. Test-Retest Reliability of a Commercial Linear Position Transducer (GymAware PowerTool) to Measure Velocity and Power in the Back Squat and Bench Press. J Strength Cond Res. 2020;34(3):728-737. PubMed PMID: 29952868.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Test-Retest Reliability of a Commercial Linear Position Transducer (GymAware PowerTool) to Measure Velocity and Power in the Back Squat and Bench Press. AU - Orange,Samuel T, AU - Metcalfe,James W, AU - Marshall,Phil, AU - Vince,Rebecca V, AU - Madden,Leigh A, AU - Liefeith,Andreas, PY - 2018/6/29/pubmed PY - 2020/9/9/medline PY - 2018/6/29/entrez SP - 728 EP - 737 JF - Journal of strength and conditioning research JO - J Strength Cond Res VL - 34 IS - 3 N2 - Orange, ST, Metcalfe, JW, Marshall, P, Vince, RV, Madden, LA, and Liefeith, A. Test-retest reliability of a commercial linear position transducer (GymAware PowerTool) to measure velocity and power in the back squat and bench press. J Strength Cond Res 34(3): 728-737, 2020-This study examined the test-retest reliability of the GymAware PowerTool (GYM) to measure velocity and power in the free-weight back squat and bench press. Twenty-nine academy rugby league players (age: 17.6 ± 1.0 years; body mass: 87.3 ± 20.8 kg) completed 2 test-retest sessions for the back squat followed by 2 test-retest sessions for the bench press. GYM measured mean velocity (MV), peak velocity (PV), mean power (MP), and peak power at 20, 40, 60, 80, and 90% of 1 repetition maximum (1RM). GYM showed good reliability (intraclass correlation coefficient [ICC] and standard error of measurement percentage, respectively) for the measurement of MV at loads of 40 (0.77, 3.9%), 60 (0.83, 4.8%), 80 (0.83, 5.8%), and 90% (0.79, 7.9%) of 1RM in the back squat. In the bench press, good reliability was evident for PV at 40 (0.82, 3.9%), 60 (0.81, 5.1%), and 80% (0.77, 8.4%) of 1RM, and for MV at 80 (0.78, 7.9%) and 90% (0.87, 9.9%) of 1RM. The measurement of MP showed good to excellent levels of reliability across all relative loads (ICC ≥0.75). In conclusion, GYM provides practitioners with reliable kinematic information in the back squat and bench press, at least with loads of 40-90% of 1RM. This suggests that strength and conditioning coaches can use the velocity data to regulate training load according to daily readiness and target specific components of the force-velocity curve. However, caution should be taken when measuring movement velocity at loads <40% of 1RM. SN - 1533-4287 UR - https://www.unboundmedicine.com/medline/citation/29952868/Test_Retest_Reliability_of_a_Commercial_Linear_Position_Transducer__GymAware_PowerTool__to_Measure_Velocity_and_Power_in_the_Back_Squat_and_Bench_Press_ L2 - https://doi.org/10.1519/JSC.0000000000002715 DB - PRIME DP - Unbound Medicine ER -