Investigation of Inter-Limb Symmetry in Knee Extensors Using Different Strength Outcome Measures
| Autor: | Jure Žitnik, Nejc Šarabon, Darjan Smajla |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Orthodontics
maximal Medicine (General) Dynamometer Knee extensors media_common.quotation_subject Communication knee extension Clinical Biochemistry Outcome measures Isometric exercise Knee extension explosive Asymmetry Symmetry (physics) submaximal R5-920 Linear regression asymmetry Mathematics media_common |
| Zdroj: | Diagnostics, Vol 11, Iss 1882, p 1882 (2021) Diagnostics |
| ISSN: | 2075-4418 |
| Popis: | Muscle performance between contra-lateral knee extensors is most often assessed using maximal test for isometric/isokinetic torque evaluation. Recently, the rate of force development scaling factor (RFD-SF) has been used to evaluate neuromuscular capacity with a range of submaximal target peak torques, which could highlight other aspects of inter-limb (a)symmetry. The aim of our study was to investigate the differences, associations, and agreement between inter-limb symmetries of knee extensors using maximal torque (Tmax) rate of torque development (RTD), slope of the RFD-SF regression line (k), and theoretical peak of RTD (TPRTD). A total of 236 young, healthy athletes participated in the cross-sectional study. All participants performed unilateral knee extension (maximal voluntary contraction protocol and RFD-SF protocol) with both legs in the isometric knee dynamometer. Inter-limb symmetries were calculated for each outcome measure. Our results showed significant differences between all symmetry values (Tmax(91.7%), RTD (85.2%), k (94.2%), TPRTD(95.9%)). Significant strong correlations were found between symmetry values calculated from k and TPRTD(r = 0.88,p< 0.001), while weak correlation was found between Tmaxand RTD (r = 0.17,p< 0.01. Fair agreement regarding leg dominance was found between Tmaxand RTD values. Our results suggest that inter-limb (a)symmetries are metric- and task-specific. |
| Databáze: | OpenAIRE |
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