The effect of deep muscle temperature on the cardiovascular responses of man to static effort

1981 ◽  
Vol 47 (1) ◽  
pp. 7-16 ◽  
Author(s):  
Jerrold Scott Petrofsky ◽  
Richard L. Burse ◽  
Alexander R. Lind
Keyword(s):  
Cardiovascular Responses ◽  
Muscle Temperature ◽  
Static Effort ◽  
Deep Muscle

Effects of Temperature of Local Baths on Deep Muscle Temperature

1951 ◽  
Vol 4 (5) ◽  
pp. 373-377 ◽  
Author(s):  
R. N. Danielson ◽  
F. W. Kinard
Keyword(s):  
Muscle Temperature ◽  
Deep Muscle ◽  
Effects Of Temperature

Insulative power of body fat on deep muscle temperatures and isometric endurance

1975 ◽  
Vol 39 (4) ◽  
pp. 639-642 ◽  
Author(s):  
J. S. Petrofsky ◽  
A. R. Lind
Keyword(s):  
Body Fat ◽  
Bath Temperature ◽  
Fat Content ◽  
Water Bath ◽  
Muscle Temperature ◽  
Isometric Handgrip ◽  
Isometric Endurance ◽  
Body Fat Content ◽  
Deep Muscle ◽  
The Difference

Four male subjects were examined to assess the relationship of body fat content to deep muscle temperature and the endurance of a fatiguing isometric handgrip contraction at a tension set at 40% MVC. Muscle temperature was altered by the immersion of the forearm in water at temperatures varying from 7.5 to 40 degrees C. In all subjects, there was a water bath temperature above and below which isometric endurance decreased markedly; the difference among individuals was solely accounted for by the individual's body fat content. Thus, subjects with higher body fat content required lower bath temperatures to cool the forearm musculature to its optimum temperature, which we found to always be approximately 27 degrees C measured 2 cm perpendicularly to the skin in the belly of the brachioradialis muscle. Further, in one subject, we found that a reduction in this subject's body fat content resulted in a corresponding increase in the water bath temperature necessary to cool his muscles to their optimum isometric performance. The data demonstrate the striking insulative power of the thin layer of fat around the forearm in man in protecting shell tissues from cold exposure.

Measurement of deep muscle temperature in ischemic limbs

1980 ◽  
Vol 139 (4) ◽  
pp. 503-507 ◽  
Author(s):  
Donald B. Williams ◽  
Richard C. Karl
Keyword(s):  
Muscle Temperature ◽  
Deep Muscle

Aging, isometric strength and endurance, and cardiovascular responses to static effort

1975 ◽  
Vol 38 (1) ◽  
pp. 91-95 ◽  
Author(s):  
J. S. Petrofsky ◽  
A. R. Lind
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Muscular Strength ◽  
Handgrip Strength ◽  
Cardiovascular Responses ◽  
Static Effort ◽  
Younger Men ◽  
Blood Pressures ◽  
Relationship Of ◽  
The Relationship

Previous studies on the relationship of age to isometric muscular strength are few, on isometric endurance rare, and on the physiological responses to static effort nonexistent. This investigation assessed the maximal handgrip strength, the duration of a fatiguing handgrip contraction at a tension of 40% of maximal strength and the heart rate and blood pressure during that contraction of 100 men aged from 22 to 62 yr. The subjects of this study were all men employed in a machine shop for a large aircraft corporation. The homogeneity of their occupations may well explain why, unlike previous reports, we found no change in muscular strength or muscular endurance with age. However, although heart rate increased during the contraction in all subjects, the increase in heart rate was greater in younger men. In contrast, while both systolic and diastolic blood pressures increased during the contraction in all subjects, the largest increase in systolic blood pressure was attained by the men in the older decades; there was no difference due to age in the diastolic blood pressures. The implications of these findings are discussed.

Temperature modulates P2X receptor-mediated cardiovascular responses to muscle afferent activation

2006 ◽  
Vol 291 (3) ◽  
pp. H1255-H1261 ◽  
Author(s):  
Zhaohui Gao ◽  
Valerie Kehoe ◽  
Jihong Xing ◽  
Lawrence Sinoway ◽  
Jianhua Li
Keyword(s):  
Muscle Contraction ◽  
Atp Release ◽  
Cardiovascular Responses ◽  
P2x Receptors ◽  
Muscle Afferents ◽  
P2x Receptor ◽  
Muscle Temperature ◽  
Muscle Stretch ◽  
Arterial Blood ◽  
Muscle Afferent

Static muscle contraction increases ATP release into the muscle interstitial space. Elevated ATP in muscle stimulates thin fiber muscle afferents and increases blood pressure via engagement of purinergic P2X receptors. In addition, ATP activates P2X receptors and enhances cardiovascular responses induced by stimulation of muscle mechanoreceptors. In this study, we examined whether elevated muscle temperature would attenuate and whether reduced temperature would potentiate P2X effects on reflex muscle responses. α,β-Methylene ATP (α,β-MeATP) was injected into the arterial blood supply of hindlimb muscle to stimulate P2X receptors, and muscle stretch was induced to activate mechanically sensitive muscle afferents as α,β-MeATP was injected in 10 anesthetized cats. Femoral arterial injection of α,β-MeATP (1.0 mM) increased mean arterial pressure (MAP) by 35 ± 5 (35°C), 26 ± 3 (37°C), and 19 ± 3 mmHg (39°C; P < 0.05 vs. 35°C), respectively. Muscle stretch (2 kg) elevated MAP. The MAP response was significantly enhanced 34% and 36% when α,β-MeATP (0.2 mM) was arterially infused 5 min before muscle stretch at 35° and 37°C, respectively. However, as muscle temperature reached 39°C, the stretch-evoked response was augmented only 6% by α,β-MeATP injection, and the response was significantly attenuated compared with the response with muscle temperature of 35° and 37°C. In addition, we also examined effects of muscle temperature on α,β-MeATP enhancement of the cardiovascular responses to static muscle contraction while the muscles were freely perfused and the circulation to the muscles was occluded. Because muscle temperature was 37°C, arterial injections of α,β-MeATP significantly augmented contraction-evoked MAP response by 49% (freely perfused) and 53% (ischemic condition), respectively. It is noted that this effect was significantly attenuated at a muscle temperature of 39°C. These data indicate that the effect of P2X receptor on reflex muscle response is sensitive to alternations of muscle temperature and that elevated temperature attenuates the response.

The Investigation of Metabolic and Cardiovascular Responses to Fatiguing Static Effort.

1980 ◽  
Author(s):  
A. R. Lind ◽  
J. S. Petrofsky ◽  
C. A. Williams ◽  
T. E. Dahms ◽  
G. Kamen
Keyword(s):  
Cardiovascular Responses ◽  
Static Effort

P-2 Effects of warm-up on muscle activity and deep muscle temperature in different sites

2016 ◽  
Vol 50 (Suppl 1) ◽  
pp. A32-A33
Author(s):  
S Lee ◽  
T Suzuki ◽  
J Hashimoto
Keyword(s):  
Muscle Activity ◽  
Muscle Temperature ◽  
Warm Up ◽  
Deep Muscle

The Relationship of Body Fat Content to Deep Muscle Temperature and Isometric Endurance in Man

1975 ◽  
Vol 48 (5) ◽  
pp. 405-412 ◽  
Author(s):  
J. S. Petrofsky ◽  
A. R. Lind
Keyword(s):  
Body Fat ◽  
Fat Content ◽  
Muscle Temperature ◽  
Isometric Endurance ◽  
Hand Grip ◽  
Body Fat Content ◽  
Before And After ◽  
Deep Muscle ◽  
Relationship Of ◽  
The Relationship

1. The relationship between body fat content, isometric endurance and deep muscle temperature was assessed in eight male and female volunteers trained to static effort. 2. Muscle temperature, measured in the belly of the brachioradialis muscle, was found to be directly related to the subjects' body fat content. 3. Associated with a reduction in body fat content, there was a marked decrease in deep muscle temperature and an increase in isometric endurance of the hand-grip muscles; no change in strength was noted. 4. Conversely, an increase in body fat content resulted in an increase in deep muscle temperature and a decrease in isometric endurance. 5. When muscle temperature was stabilized before and after weight loss by immersing the forearm in water at 37°C, a reduction in body fat no longer influenced endurance. 6. It was concluded that the change in isometric endurance associated with either loss or gain of weight can be accounted for entirely by the changes in muscle temperature.

scholarly journals Cardiovascular responses to dynamic and static effort soon after myocardial infarction. Application to occupational work assessment.

Circulation ◽  
1978 ◽  
Vol 58 (2) ◽  
pp. 368-375 ◽  
Author(s):  
R F DeBusk ◽  
R Valdez ◽  
N Houston ◽  
W Haskell
Keyword(s):  
Myocardial Infarction ◽  
Cardiovascular Responses ◽  
Work Assessment ◽  
Static Effort ◽  
Occupational Work

John Ludbrook APPS Symposium Neural Mechanisms In The Cardiovascular Responses To Acute Central Hypovolaemia

2001 ◽  
Vol 28 (5-6) ◽  
pp. 479-487
Author(s):  
Roger G Evans ◽  
Sabatino Ventura ◽  
Roger Al Dampney ◽  
John Ludbrook
Keyword(s):  
Cardiovascular Responses ◽  
Neural Mechanisms ◽  
Central Hypovolaemia
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