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Multi-joint rate of force development testing protocol affects reliability and the smallest detectible difference.
J Sports Sci. 2019 Jul; 37(14):1570-1581.JS

Abstract

Isometric tests have been used to assess rate of force development (RFD), however variation in testing methodologies are known to affect performance outcomes. The aim of this study was to assess the RFD in the isometric squat (ISqT) using two test protocols and two testing angles. Eleven participants (age: 26.8 ± 4.5 years, strength training experience: 7.1 ± 3.03 years) completed test and retest sessions one week apart, whereby two test protocols with respect to duration and instructions were compared. Isometric peak force (ISqTpeak) and isometric explosive force (ISqTexp) tests were assessed at two joint angles (knee flexion angle 100° and 125°). Force-time traces were sampled and subsequently analysed for RFD measures. Average and instantaneous RFD variables did not meet reliability minimum criteria in ISqTpeak at 100° or 125°. The ISqTexp test at 100° met reliability criteria in the RFD 0-200 and 0-250ms variables. The ISqTexp test at 125° met reliability criteria in the RFD 0-150, 0-200 and 0-250ms variables. Force-time characteristics were optimized at the higher knee joint angle. Average and instantaneous RFD measures obtained using a traditional peak force test do not meet basic reliability criteria. Researchers assessing multi-joint RFD should employ the explosive RFD test protocol as opposed to the traditional isometric peak force protocol.

Authors+Show Affiliations

a School of Sport , Ulster University , Newtownabbey , N. Ireland. b Ulster Rugby, Irish Rugby Football Union , Belfast , N. Ireland.a School of Sport , Ulster University , Newtownabbey , N. Ireland. c Sport and Exercise Science Research Institute , Ulster University , Newtownabbey , N. Ireland.a School of Sport , Ulster University , Newtownabbey , N. Ireland. c Sport and Exercise Science Research Institute , Ulster University , Newtownabbey , N. Ireland.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

30810474

Citation

Drake, David, et al. "Multi-joint Rate of Force Development Testing Protocol Affects Reliability and the Smallest Detectible Difference." Journal of Sports Sciences, vol. 37, no. 14, 2019, pp. 1570-1581.
Drake D, Kennedy RA, Wallace ES. Multi-joint rate of force development testing protocol affects reliability and the smallest detectible difference. J Sports Sci. 2019;37(14):1570-1581.
Drake, D., Kennedy, R. A., & Wallace, E. S. (2019). Multi-joint rate of force development testing protocol affects reliability and the smallest detectible difference. Journal of Sports Sciences, 37(14), 1570-1581. https://doi.org/10.1080/02640414.2019.1576258
Drake D, Kennedy RA, Wallace ES. Multi-joint Rate of Force Development Testing Protocol Affects Reliability and the Smallest Detectible Difference. J Sports Sci. 2019;37(14):1570-1581. PubMed PMID: 30810474.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Multi-joint rate of force development testing protocol affects reliability and the smallest detectible difference. AU - Drake,David, AU - Kennedy,Rodney A, AU - Wallace,Eric S, Y1 - 2019/02/27/ PY - 2019/2/28/pubmed PY - 2019/7/16/medline PY - 2019/2/28/entrez KW - Explosive force KW - maximal strength KW - neuromuscular KW - stability reliability SP - 1570 EP - 1581 JF - Journal of sports sciences JO - J Sports Sci VL - 37 IS - 14 N2 - Isometric tests have been used to assess rate of force development (RFD), however variation in testing methodologies are known to affect performance outcomes. The aim of this study was to assess the RFD in the isometric squat (ISqT) using two test protocols and two testing angles. Eleven participants (age: 26.8 ± 4.5 years, strength training experience: 7.1 ± 3.03 years) completed test and retest sessions one week apart, whereby two test protocols with respect to duration and instructions were compared. Isometric peak force (ISqTpeak) and isometric explosive force (ISqTexp) tests were assessed at two joint angles (knee flexion angle 100° and 125°). Force-time traces were sampled and subsequently analysed for RFD measures. Average and instantaneous RFD variables did not meet reliability minimum criteria in ISqTpeak at 100° or 125°. The ISqTexp test at 100° met reliability criteria in the RFD 0-200 and 0-250ms variables. The ISqTexp test at 125° met reliability criteria in the RFD 0-150, 0-200 and 0-250ms variables. Force-time characteristics were optimized at the higher knee joint angle. Average and instantaneous RFD measures obtained using a traditional peak force test do not meet basic reliability criteria. Researchers assessing multi-joint RFD should employ the explosive RFD test protocol as opposed to the traditional isometric peak force protocol. SN - 1466-447X UR - https://www.unboundmedicine.com/medline/citation/30810474/Multi_joint_rate_of_force_development_testing_protocol_affects_reliability_and_the_smallest_detectible_difference_ L2 - https://www.tandfonline.com/doi/full/10.1080/02640414.2019.1576258 DB - PRIME DP - Unbound Medicine ER -