Overload Injury of the Knees with Resistance-Exercise Overtraining: A Case Study | Zendy

Andrew C. Fry | Zendy; William J. Kraemer | Zendy; J. M. Lynch | Zendy; Jason M. Barnes | Zendy

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Overload Injury of the Knees with Resistance-Exercise Overtraining: A Case Study

Author(s) -

Andrew C. Fry,

William J. Kraemer,

J. M. Lynch,

Jason M. Barnes

Publication year - 2001

Publication title -

journal of sport rehabilitation

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.606

H-Index - 51

eISSN - 1543-3072

pISSN - 1056-6716

DOI - 10.1123/jsr.10.1.57

Subject(s) - overtraining , isometric exercise , squat , medicine , physical therapy , strength training , physical medicine and rehabilitation , resistance training , athletes

Objective: To report a joint-centered mechanism of performance decrements caused by overtraining. Design: Case study. Setting: Laboratory-induced overtraining. Participants: Eleven weight-trained men, 1 (subject A) with overload injury of the knees. Intervention: High-intensity squat resistance-exercise overtraining for 2 weeks. Outcome Measures: 1RM lower-body strength, isokinetic and isometric knee-extension strength, and stimulated isometric knee-extension strength. Results: Subject A’s 1RM strength decreased 40.3 kg, and the other overtrained subjects (OT) exhibited significant (P < .05) 1RM decrements (x = –9.3 kg). Isokinetic knee-extension strength decreased for all subjects. For the OT group, voluntary isometric knee-extension strength did not change and stimulated isometric knee-extension strength decreased. Subject A exhibited increased values for both these variables. Discussion: These data indicate that muscle strength was attenuated for subject A only during dynamic activity. It is theorized ...

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