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Compression apparel does not have an acute effect on quadriceps strength but is associated with changes in muscle activation patterns
Zhang S, Fu W, Xia R, Wang X
Isokinetics and Exercise Science 2016;24(1):59-65
clinical trial
2/10 [Eligibility criteria: No; Random allocation: Yes; Concealed allocation: No; Baseline comparability: No; Blind subjects: No; Blind therapists: No; Blind assessors: No; Adequate follow-up: No; Intention-to-treat analysis: No; Between-group comparisons: Yes; Point estimates and variability: No. Note: Eligibility criteria item does not contribute to total score] *This score has been confirmed*

BACKGROUND: The mechanism by which increased compression affects muscle strength and electromyographic (EMG) time/frequency domain behavior during prolonged muscle actions has yet to be elucidated. OBJECTIVE: To determine the effectiveness of compression on quadriceps strength and endurance and EMG amplitude/frequency of the quadriceps during repeated concentric muscle contractions. METHODS: Twelve healthy male athletes executed 25 maximal repeated isokinetic knee extensions in compression garment (CG) and control condition (CC) at 60 and 300 degree/s on a dynamometer. The EMG time and frequency domain behavior of the rectus femoris (RF), vastus lateralis (VL), and vastus medialis were collected synchronously. RESULTS: Compression exerted no significant effect on peak moment and total work during the isokinetic contractions. By contrast, the overall EMG root mean square amplitude was significantly lower (p < 0.05) in CG than in CC while the EMG mean power frequency of the RF and VL was significantly higher (p < 0.05) in CG than in CC at 60 degree/s. CONCLUSION: The described effects may potentially improve muscle endurance and fatigue resistance during prolonged muscle actions.

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