Role of muscle mass and mode of contraction in circulatory responses to exercise

S. F. Lewis, P. G. Snell, W. F. Taylor, M. Hamra, R. M. Graham, W. A. Pettinger, C. G. Blomqvist

Research output: Contribution to journalArticle

99 Citations (Scopus)

Abstract

The roles of the mode of contraction (i.e., dynamic or static) and the active muscle mass as determinants of the cardiovascular responses to exercise were studied. Six healthy men performed static handgrip (SHG), dynamic handgrip (DHG), static two-knee extension (SKE), and dynamic two-knee extension (DKE) to local muscular fatigue in ~6 min. Increases in mean arterial pressure were similar for each mode of contraction, 29 ± 5 and 30 ± 3 mmHg in SHG and DHG and 56 ± 2 and 48 ± 2 mmHG in SKE and DKE (p>0.05) but larger for KE than HG (p<0.001). Cardiac output increased more for dynamic than for state excercise and for each mode more for KE than HG (p≤0.001). Systemic resistance was lower for dynamic than static exercise and fell from resting levels by ~1/3 during DKE. The magnitude of the pressor response was related to the active muscle mass but independent of the contraction mode. However, the mode of contraction affected the circulatory changes contributing to the pressor response. Equalization of the pressor responses was achieved by proportionately larger increases in cardiac output during dynamic exercise.

Original languageEnglish (US)
Pages (from-to)146-151
Number of pages6
JournalJournal of Applied Physiology
Volume58
Issue number1
StatePublished - 1985

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Knee
Exercise
Muscles
Cardiac Output
Muscle Fatigue
Arterial Pressure

ASJC Scopus subject areas

  • Physiology
  • Endocrinology
  • Orthopedics and Sports Medicine
  • Physical Therapy, Sports Therapy and Rehabilitation

Cite this

Lewis, S. F., Snell, P. G., Taylor, W. F., Hamra, M., Graham, R. M., Pettinger, W. A., & Blomqvist, C. G. (1985). Role of muscle mass and mode of contraction in circulatory responses to exercise. Journal of Applied Physiology, 58(1), 146-151.

Role of muscle mass and mode of contraction in circulatory responses to exercise. / Lewis, S. F.; Snell, P. G.; Taylor, W. F.; Hamra, M.; Graham, R. M.; Pettinger, W. A.; Blomqvist, C. G.

In: Journal of Applied Physiology, Vol. 58, No. 1, 1985, p. 146-151.

Research output: Contribution to journalArticle

Lewis, SF, Snell, PG, Taylor, WF, Hamra, M, Graham, RM, Pettinger, WA & Blomqvist, CG 1985, 'Role of muscle mass and mode of contraction in circulatory responses to exercise', Journal of Applied Physiology, vol. 58, no. 1, pp. 146-151.
Lewis SF, Snell PG, Taylor WF, Hamra M, Graham RM, Pettinger WA et al. Role of muscle mass and mode of contraction in circulatory responses to exercise. Journal of Applied Physiology. 1985;58(1):146-151.
Lewis, S. F. ; Snell, P. G. ; Taylor, W. F. ; Hamra, M. ; Graham, R. M. ; Pettinger, W. A. ; Blomqvist, C. G. / Role of muscle mass and mode of contraction in circulatory responses to exercise. In: Journal of Applied Physiology. 1985 ; Vol. 58, No. 1. pp. 146-151.
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