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Reliability of a portable fixed frame dynamometry system used to test lower limb strength in elite Australian Football League players.
J Sci Med Sport. 2020 Sep; 23(9):826-830.JS

Abstract

OBJECTIVES

Deficits in strength of lower limb musculature have been associated with increased injury risk in a variety of athletic populations. As medical and performance staff seek to better understand the association between hip and knee strength measures and injury risk, measurement tools with high reliability and utility are required to profile and manage athletes effectively. The purpose of this study was to investigate the test-retest reliability of a portable fixed frame dynamometry system used to assess hip and knee strength of an elite Australian Football League team.

DESIGN

Case series.

METHODS

Maximum voluntary isometric strength of the hip abductors, hip adductors and knee flexors of 41 elite male Australian Football League footballers (mean age=23.7±4.1 years, height=189.2±7.0cm, weight=88.6±8.4kg) were tested during preseason training. Tests were performed one week apart on the same training day of a standard preseason week.

RESULTS

Test-retest reliability was very high for left hip adduction (ICC 0.958), right hip adduction (ICC 0.955), left hip abduction (ICC 0.957), right hip abduction (ICC 0.945), left knee flexion (ICC 0.927) and right knee flexion (ICC 0.923). Furthermore, standard errors of measurement in per cent (SEM%) ranged from 3.21 to 5.03%, and minimal detectable change (MDC) from 3.93 to 6.65kg for the different hip and thigh strength measures, making it possible to determine small changes in strength at the individual level.

CONCLUSIONS

This study demonstrated very high reliability when testing maximal voluntary isometric hip and knee strength using a portable fixed dynamometry system (KangaTech) in an elite male Australian Football League setting.

Authors+Show Affiliations

International Centre for Allied Health Evidence, University of South Australia, Australia; Adelaide Crows Football Club, Australia. Electronic address: matt.ransom@unisa.edu.au.School of Health Sciences, University of South Australia, Australia; Adelaide Crows Football Club, Australia; Saunders Physiotherapy, Australia.North Melbourne Football Club, Australia.North Melbourne Football Club, Australia.North Melbourne Football Club, Australia.School of Health Sciences, University of South Australia, Australia.International Centre for Allied Health Evidence, University of South Australia, Australia; School of Health Sciences, University of South Australia, Australia.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

32265133

Citation

Ransom, Matt, et al. "Reliability of a Portable Fixed Frame Dynamometry System Used to Test Lower Limb Strength in Elite Australian Football League Players." Journal of Science and Medicine in Sport, vol. 23, no. 9, 2020, pp. 826-830.
Ransom M, Saunders S, Gallo T, et al. Reliability of a portable fixed frame dynamometry system used to test lower limb strength in elite Australian Football League players. J Sci Med Sport. 2020;23(9):826-830.
Ransom, M., Saunders, S., Gallo, T., Segal, J., Jones, D., Jones, M., & Milanese, S. (2020). Reliability of a portable fixed frame dynamometry system used to test lower limb strength in elite Australian Football League players. Journal of Science and Medicine in Sport, 23(9), 826-830. https://doi.org/10.1016/j.jsams.2020.03.006
Ransom M, et al. Reliability of a Portable Fixed Frame Dynamometry System Used to Test Lower Limb Strength in Elite Australian Football League Players. J Sci Med Sport. 2020;23(9):826-830. PubMed PMID: 32265133.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Reliability of a portable fixed frame dynamometry system used to test lower limb strength in elite Australian Football League players. AU - Ransom,Matt, AU - Saunders,Steve, AU - Gallo,Tania, AU - Segal,Jona, AU - Jones,Daniel, AU - Jones,Mark, AU - Milanese,Steve, Y1 - 2020/03/19/ PY - 2019/11/05/received PY - 2020/03/04/revised PY - 2020/03/08/accepted PY - 2020/4/9/pubmed PY - 2020/4/9/medline PY - 2020/4/9/entrez KW - Athletes KW - Football KW - Hip KW - Knee KW - Muscle strength KW - Reliability SP - 826 EP - 830 JF - Journal of science and medicine in sport JO - J Sci Med Sport VL - 23 IS - 9 N2 - OBJECTIVES: Deficits in strength of lower limb musculature have been associated with increased injury risk in a variety of athletic populations. As medical and performance staff seek to better understand the association between hip and knee strength measures and injury risk, measurement tools with high reliability and utility are required to profile and manage athletes effectively. The purpose of this study was to investigate the test-retest reliability of a portable fixed frame dynamometry system used to assess hip and knee strength of an elite Australian Football League team. DESIGN: Case series. METHODS: Maximum voluntary isometric strength of the hip abductors, hip adductors and knee flexors of 41 elite male Australian Football League footballers (mean age=23.7±4.1 years, height=189.2±7.0cm, weight=88.6±8.4kg) were tested during preseason training. Tests were performed one week apart on the same training day of a standard preseason week. RESULTS: Test-retest reliability was very high for left hip adduction (ICC 0.958), right hip adduction (ICC 0.955), left hip abduction (ICC 0.957), right hip abduction (ICC 0.945), left knee flexion (ICC 0.927) and right knee flexion (ICC 0.923). Furthermore, standard errors of measurement in per cent (SEM%) ranged from 3.21 to 5.03%, and minimal detectable change (MDC) from 3.93 to 6.65kg for the different hip and thigh strength measures, making it possible to determine small changes in strength at the individual level. CONCLUSIONS: This study demonstrated very high reliability when testing maximal voluntary isometric hip and knee strength using a portable fixed dynamometry system (KangaTech) in an elite male Australian Football League setting. SN - 1878-1861 UR - https://www.unboundmedicine.com/medline/citation/32265133/Reliability_of_a_portable_fixed_frame_dynamometry_system_used_to_test_lower_limb_strength_in_elite_Australian_Football_League_players L2 - https://linkinghub.elsevier.com/retrieve/pii/S1440-2440(19)31483-5 DB - PRIME DP - Unbound Medicine ER -
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