Nitric oxide and muscle blood flow in exercise

2008 ◽  
Vol 33 (1) ◽  
pp. 151-160 ◽  
Author(s):  
Michael E. Tschakovsky ◽  
Michael J. Joyner
Keyword(s):  
Nitric Oxide ◽  
Blood Flow ◽  
Integrated Control ◽  
Muscle Blood Flow ◽  
Dynamic Adjustment ◽  
Resistance Vessels ◽  
Sympathetic Vasoconstriction ◽  
Exercise Hyperemia ◽  
Blood Flow Control

Despite being the subject of investigation for well over 100 years, the nature of exercising muscle blood flow control remains, in many respects, poorly understood. In this review we focus on the potential role of nitric oxide in vasodilation of muscle resistance vessels during a bout of exercise. Its contribution is explored in the context of whether it contributes to steady-state exercise hyperemia, the dynamic adjustment of muscle blood flow to exercise, or the modulation of sympathetic vasoconstriction in exercising muscle. It appears that the obligatory role of nitric oxide in all three of these categories is modest at best. The elucidation of the integrated nature of exercise hyperemia control in terms of synergy and redundancy of mechanism interaction remains in its infancy, and much more remains to be learned about the role of nitric oxide in this type of integrated control.

Role of nitric oxide in local blood flow control in the anaesthetized dog

1992 ◽  
Vol 420 (2) ◽  
pp. 194-199 ◽  
Author(s):  
Michael Sonntag ◽  
Andreas Deussen ◽  
J�rgen Schrader
Keyword(s):  
Nitric Oxide ◽  
Blood Flow ◽  
Flow Control ◽  
Local Blood Flow ◽  
Blood Flow Control ◽  
Anaesthetized Dog

scholarly journals Influence of sympathetic vasoconstriction on muscle blood flow control during graded handgrip exercise in young and older adults (1165.2)

2014 ◽  
Vol 28 (S1) ◽  
Author(s):  
Jennifer Richards ◽  
Anne Crecelius ◽  
Christoper Hearon ◽  
Matthew Racine ◽  
Dennis Larson ◽  
...  
Keyword(s):  
Older Adults ◽  
Blood Flow ◽  
Flow Control ◽  
Muscle Blood Flow ◽  
Handgrip Exercise ◽  
Sympathetic Vasoconstriction ◽  
Blood Flow Control

Role of nitric oxide in skeletal muscle blood flow at rest and during dynamic exercise in humans

1997 ◽  
Vol 273 (1) ◽  
pp. H405-H410 ◽  
Author(s):  
R. C. Hickner ◽  
J. S. Fisher ◽  
A. A. Ehsani ◽  
W. M. Kohrt
Keyword(s):  
Nitric Oxide ◽  
Skeletal Muscle ◽  
Blood Flow ◽  
Vastus Lateralis ◽  
Muscle Blood Flow ◽  
Dynamic Exercise ◽  
Skeletal Muscle Blood Flow ◽  
Blood Flows ◽  
And Control

The role of nitric oxide at rest and in the active hyperemic response within skeletal muscle was investigated in eight physically active men. Three microdialysis probes were inserted into the vastus lateralis of the quadriceps femoris muscle group in each subject. Microdialysis probes were perfused with a Ringer solution containing 5.0 mM ethanol, 2.5 mM glucose, and either 10 mg/ml of the nitric oxide synthase inhibitor NG-monomethyl-L-arginine (L-NMMA) monoacetate salt, 30 mg/ml of the nitric oxide precursor L-arginine, or no additional substance (control probe). Subjects performed one-legged cycling exercise at work rates ranging from 25 to 100 W. Dialysate and perfusate ethanol concentrations were presented as the ratio of [ethanol]dialysate to [ethanol]perfusate (ethanol outflow-to-inflow ratio), an indicator that is inversely related to blood flow. The ethanol outflow-to-inflow ratios at rest were 0.614 +/- 0.032, 0.523 +/- 0.023, and 0.578 +/- 0.039 in the L-NMMA, L-arginine, and control probes, respectively. Calculated resting blood flows were therefore 8.7 +/- 4.1, 20.5 +/- 4.6, and 14.0 +/- 4.7 ml.min-1.100 g-1 around the L-NMMA, L-arginine, and control probes, respectively. The ethanol outflow-to-inflow ratios were significantly higher at all exercise intensities in the L-NMMA probe than in the control and L-arginine probes, resulting in calculated blood flows of 195 +/- 55, 407 +/- 47, and 352 +/- 60 ml.min-1.100 g-1 at 25 W and 268 +/- 65, 602 +/- 129, and 519 +/- 113 ml.min-1.100 g-1 at 100 W around the L-NMMA, L-arginine, and control probes, respectively. Skeletal muscle blood flow was therefore reduced both at rest and during continuous, dynamic exercise by the action of L-NMMA, whereas blood flow was increased only at rest by L-arginine.

Nitric Oxide and Physiologic Vasodilation in Human Limbs: Where Do We Go From Here?

2003 ◽  
Vol 28 (3) ◽  
pp. 475-490 ◽  
Author(s):  
Michael J. Joyner ◽  
Michael E. Tschakovsky
Keyword(s):  
Nitric Oxide ◽  
Blood Flow ◽  
Key Words ◽  
Skin Blood Flow ◽  
Mayo Clinic ◽  
Mental Stress ◽  
Reactive Hyperemia ◽  
Limb Ischemia ◽  
Exercise Hyperemia

This brief review highlights human studies on the role of nitric oxide (NO) and limb vasodilation conducted at the Mayo Clinic over the last 10 years. These studies have attempted to determine whether NO is responsible for the "unexplained" limb vasodilation seen with body heating, limb ischemia, exercise, and mental stress. Our findings are placed in context with data from others, and possible future areas of study are identified. Key words: skin blood flow, reactive hyperemia, exercise hyperemia, mental stress

scholarly journals Vascular nitric oxide: effects of exercise training in animals

2008 ◽  
Vol 33 (1) ◽  
pp. 173-178 ◽  
Author(s):  
Richard M. McAllister ◽  
Sean C. Newcomer ◽  
M. Harold Laughlin
Keyword(s):  
Nitric Oxide ◽  
Skeletal Muscle ◽  
Blood Flow ◽  
Exercise Training ◽  
Maximal Exercise ◽  
Muscle Blood Flow ◽  
Disease Process ◽  
Vascular Health ◽  
Endurance Exercise Training ◽  
Resistance Vessels

Exercise training is known to induce several adaptations in the cardiovascular system, one of which is increased skeletal muscle blood flow at maximal exercise. Improved muscle blood flow, in turn, could in part be accounted for by augmented endothelium-dependent, nitric oxide (NO)-mediated vasodilation. Studies have indeed demonstrated that endothelium-dependent, NO-mediated dilation of conductance-type vessels is augmented after endurance exercise training; recently, this adaptation has been extended into resistance-type vessels within rodent skeletal muscle. With the latter, however, it appears that only resistance vessels supplying muscle active during training sessions exhibit this adaptation. These findings in rats are in contrast to those from human studies, in which increased endothelium-dependent dilation has been observed in vasculatures not associated with elevated blood flow during exercise. Increased expression of endothelial NO synthase (eNOS) appears to underlie enhanced endothelium-dependent, NO-mediated dilation of both conductance and resistance vessels. Greater eNOS expression may also underlie the preventive and (or) rehabilitative effect(s) of exercise training on atherosclerosis, given that NO inhibits several steps of the atherosclerotic disease process. Thus, exercise training may induce adaptations that benefit both vasodilation and vascular health.

Role of Nitric Oxide on Papillary Blood Flow and Pressure Natriuresis

Hypertension ◽  
1995 ◽  
Vol 25 (3) ◽  
pp. 408-414 ◽  
Author(s):  
Francisco J. Fenoy ◽  
Paloma Ferrer ◽  
Luis Carbonell ◽  
Miguel García-Salom
Keyword(s):  
Nitric Oxide ◽  
Blood Flow ◽  
Pressure Natriuresis

Training increases muscle blood flow in rats with peripheral arterial insufficiency

1990 ◽  
Vol 69 (4) ◽  
pp. 1353-1359 ◽  
Author(s):  
H. T. Yang ◽  
R. F. Dinn ◽  
R. L. Terjung
Keyword(s):  
Blood Flow ◽  
Muscle Blood Flow ◽  
Treadmill Running ◽  
Distal Limb ◽  
Adult Rats ◽  
Cage Activity ◽  
Exercise Hyperemia ◽  
Two Factors ◽  
Arterial Insufficiency ◽  
Peripheral Arterial

This study investigated the effect of physical training on muscle blood flow (BF) in rats with peripheral arterial insufficiency during treadmill running. Bilateral stenosis of the femoral artery of adult rats (300-350 g) was performed to reduce exercise hyperemia in the hindlimb but not limit resting muscle BF. Rats were divided into normal sedentary, acute stenosed (stenosed 3 days before the experiment), stenosed sedentary (limited to cage activity), and stenosed trained (run on a treadmill by a progressively intense program, up to 50-60 min/day, 5 days/wk for 6-8 wk). Hindlimb BF was determined with 85Sr- and 141Ce-labeled microspheres at a low (20 m/min) and high treadmill speed (30-40 m/min depending on ability). Maximal hindlimb BF was reduced to approximately 50% normal in the acute stenosed group. Total hindlimb BF (81 +/- 5 ml.min-1.100 g-1) did not change in stenosed sedentary animals with 6-8 wk of cage activity, but a redistribution of BF occurred within the hindlimb. Two factors contributed to a higher BF to the distal limb muscle of the trained animals. A redistribution BF within the hindlimb occurred in stenosed trained animals; distal limb BF increased to approximately 80% (P less than 0.001) of the proximal tissue. In addition, an increase in total hindlimb BF with training indicates that collateral BF has been enhanced (P less than 0.025). The associated increase in oxygen delivery to the relatively ischemic muscle probably contributed to the markedly improved exercise tolerance evident in the trained animals.

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