The Influence of Posture on Isometric Strength and Endurance Forearm Blood Flow, and the Blood Pressure and Heart Rate Response to Isometric Exercise.
Abstract
The influence of posture on isometric muscular capacity has been examined on four subjects in the sitting, 45 degrees head-up, recumbent and 15 degrees head-down position. The maximal voluntary contraction (MVC) of the subjects' hand-grip was unaffected by posture, but the endurance time of an isometric contraction held to fatigue at 40% MVC was 20% longer in the sitting than in any other posture. That difference in endurance was abolished when the circulation to the exercising forearm was occluded. The blood flow to the forearm was found to be higher at rest before and after isometric contractions in the recumbent subjects than when they were sitting, but during the contractions, the reverse was true and the forearm blood flow was greater when seated than when recumbent.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 07, 1974
- Accession Number
- ADA004332
Entities
People
- A. R. Lind
- J. S. Petrofsky
- J. S. Rinehart
- P. G. Schmid
- R. L. Burse
Organizations
- Saint Louis University