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Ultrasound treatment and recovery from eccentric-exercise-induced muscle damage
Tiidus PM, Cort J, Woodruff SJ, Bryden P
Journal of Sport Rehabilitation 2002;11(4):305-314
clinical trial
4/10 [Eligibility criteria: No; Random allocation: Yes; Concealed allocation: No; Baseline comparability: Yes; Blind subjects: Yes; Blind therapists: No; Blind assessors: Yes; Adequate follow-up: No; Intention-to-treat analysis: No; Between-group comparisons: No; Point estimates and variability: No. Note: Eligibility criteria item does not contribute to total score] *This score has been confirmed*

OBJECTIVES: To evaluate ultrasound's effectiveness after eccentric-exercise-induced muscle damage. PARTICIPANTS: 22 subjects. INTERVENTION: Random assignment to ultrasound (UT) or placebo (PT). Ultrasound was applied immediately and 24, 48, and 72 h after 50 maximum eccentric contractions of the biceps. OUTCOME MEASURES: Concentric and eccentric peak torques, resting elbow angle, and subjective muscle soreness were measured before and 24, 48, 72, and 96 h afterward. RESULTS: No significant differences between UT and PT for biceps concentric or eccentric peak torque were noted. Both groups exhibited significant (p < 0.01) depression in eccentric and concentric peak torques with a slow return toward preexercise values over 96 h. Resting elbow angles for both groups were significantly lower than preexercise values up to 96 h (p < 0.01). Muscle soreness increased significantly (p < 0.05) at 24 and 48 h and returned to preexercise levels by 96 h.
Copyright Human Kinetics. Reprinted with permission from Human Kinetics (Champaign, IL).

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