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Bed rest effect on extremity muscle torque in healthy men
P Gogia1, V S Schneider, A D LeBlanc
1AMI Park Plaza Hospital, Houston, TX 77004.
Archives of Physical Medicine and Rehabilitation
|December 1, 1988
Summary
Five weeks of bed rest significantly reduced appendicular muscle torque in healthy males, except for elbow extensors. Early ambulation and strengthening exercises are recommended to mitigate muscle loss.
Area of Science:
- Physiology
- Exercise Science
- Musculoskeletal Health
Background:
- Prolonged bed rest is common in clinical settings.
- Bed rest can lead to significant deconditioning and loss of muscle function.
- Understanding the impact on specific muscle groups is crucial for rehabilitation.
Purpose of the Study:
- To quantify the effect of strict bed rest on appendicular muscle torque.
- To identify which muscle groups are most affected by inactivity.
- To provide evidence for targeted interventions during and after bed rest.
Main Methods:
- Fifteen healthy males underwent five weeks of strict horizontal bed rest.
- Appendicular muscle torque was measured using a Cybex II dynamometer before and after bed rest.
- Tested muscle groups included ankle, knee, and elbow flexors and extensors.
Main Results:
- Significant reductions in muscle torque were observed in all tested groups except elbow extensors.
- Ankle dorsiflexors and plantarflexors showed the largest torque loss (24% and 26%).
- Knee flexors and extensors also demonstrated significant strength decline (8% each).
Conclusions:
- Strict bed rest leads to substantial loss of appendicular muscle torque.
- Targeted strengthening exercises during bed rest may be beneficial.
- Early ambulation post-bed rest is critical to minimize muscle deconditioning and restore function.