Blood Flow during Muscle Contraction and Relaxation in Rhythmic Exercise at Different Intensities.

Kagaya, Atsuko; Ogita, Futoshi

doi:10.2114/ahs1983.11.251

Cited by 38 publications

(39 citation statements)

References 14 publications

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“…Furthermore, during the recovery from PEMI, the highest value for total Hb was noted as being concomitant with the highest¯ow being elicited in the passive forearm in response to reperfusion hyperaemia. During handgrip exercise, the forearm blood ow was only 55% of the value noted during reperfusion after PEMI, and almost identical at the two exercise intensities (352 and 431 ml á min A1 ) which supports the suggestion that has been made of a circulatory limitation to O 2 , even when the capacity of the heart is unlikely to be challenged (Kagaya and Ogita 1992). In humans involved in exercise with a larger muscle mass, a maximal ow rate has been reported only during arm cranking.…”

Section: A1supporting

confidence: 70%

Muscle metabolism from near infrared spectroscopy during rhythmic handgrip in humans

Boushel

Pott

Madsen

et al. 1998

European Journal of Applied Physiology

101

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The rate of metabolism in forearm¯exor muscles (MO 2 ) was derived from near-infrared spectroscopy (NIRS-O 2 ) during ischaemia at rest rhythmic handgrip at 15% and 30% of maximal voluntary contraction (MVC), post-exercise muscle ischaemia (PEMI), and recovery in seven subjects. O 2 increased only 30%. During PEMI after 15% and 30% MVC, NIRS-O 2 fell to 9 (SEM 1)% and``0'', but the use of oxygen by forearm muscles was not re¯ected in v O 2 . During reperfusion after PEMI, the peak NIRS-O 2 was lowest after intense exercise, while for v O 2 the reverse was seen. The discrepancies between NIRS-O 2 and v O 2 , and therefore between the estimates of the metabolic rate, would suggest signi®cant limitations in sampling venous blood which is representative of the¯exor muscle capillaries. In support of this contention, v O 2 and venous pH decreased during the ®rst seconds of reperfusion after PEMI. To conclude, NIRS-O 2 of forearm¯exor muscles closely re¯ected the exercise intensity and the metabolic rate determined by magnetic resonance spectroscopy but not that rate derived from¯ow and the arterio-venous oxygen dierence.

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Section: A1supporting

confidence: 70%

Muscle metabolism from near infrared spectroscopy during rhythmic handgrip in humans

Boushel

Pott

Madsen

et al. 1998

European Journal of Applied Physiology

101

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“…The advantage to using ultrasound Doppler for exercise studies is that it can monitor flow both during the contraction and relaxation phases of rhythmic exercise. 19 Previous studies have shown that flow is much higher in major arteries during relaxation compared to contraction, 50 although arterial inflow occurs almost exclusively between contractions. 51 Perfusion in the microvasculature is inhibited during contractions due to increased intramuscular pressure and extravascular compression.…”

Section: Discussionmentioning

confidence: 99%

Noninvasive optical quantification of absolute blood flow, blood oxygenation, and oxygen consumption rate in exercising skeletal muscle

2012

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Abstract. This study investigates a method using novel hybrid diffuse optical spectroscopies [near-infrared spectroscopy (NIRS) and diffuse correlation spectroscopy (DCS)] to obtain continuous, noninvasive measurement of absolute blood flow (BF), blood oxygenation, and oxygen consumption rate ( _ VO 2 ) in exercising skeletal muscle. Healthy subjects (n ¼ 9) performed a handgrip exercise to increase BF and _ VO 2 in forearm flexor muscles, while a hybrid optical probe on the skin surface directly monitored oxy-, deoxy-, and total hemoglobin concentrations ([HbO 2 ], [Hb], and THC), tissue oxygen saturation (S t O 2 ), relative BF (rBF), and relative oxygen consumption rate (r _ VO 2 ). The rBF and r _ VO 2 signals were calibrated with absolute baseline BF and _ VO 2 obtained through venous and arterial occlusions, respectively. Known problems with muscle-fiber motion artifacts in optical measurements during exercise were mitigated using a novel gating algorithm that determined muscle contraction status based on control signals from a dynamometer. Results were consistent with previous findings in the literature. This study supports the application of NIRS/DCS technology to quantitatively evaluate hemodynamic and metabolic parameters in exercising skeletal muscle and holds promise for improving diagnosis and treatment evaluation for patients suffering from diseases affecting skeletal muscle and advancing fundamental understanding of muscle and exercise physiology.

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“…Blood flow during rhythmic exercise dramatically changes concomitant with muscle contraction and relaxation (Barcroft and Dornhorst 1949, Barnes 1986, Kagaya and Ogita 1992, Walløe and Wesche 1988. This mechanical disturbance of muscle circulation originates from the anatomical arrangements of muscle fibers and vessels.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, the muscles develop tension during muscle contractions and thereby the elevated intramuscular pressure compresses the capillaries between the fibers (Sjø gaard, et al, 1986, Sejersted, et al, 1984 ( Figure 1B). This causes blood flow restriction or occlusion to the contracting muscles on the arterial side and expels blood from the muscle on the venous side (muscle pump) (Barnes 1986, Bonde-Petersen, et al, 1975, Gaskell 1877, Kagaya and Ogita 1992, Lind and McNicol 1967, Sadamoto, et al, 1983, Sjø gaard, et al, 1986. Accordingly, changes in vessel geometry due to muscle lengthening/shortening and vessel compression due to developed muscle tension are two major factors which mechanically modify muscle circulation.…”

Section: Introductionmentioning

confidence: 99%

Muscle Architecture and its Relationship to Muscle Circulation

Kagaya

Muraoka

2005

Int. J. Sport Health Sci.

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Muscle contraction mechanically changes vessel geometry and consequently muscle circulation. Lengthening of muscle fiber straightens capillary tortuosity and further increase in muscle fiber length reduces blood flow by extending the capillary while reducing its diameter. The direction of capillary to the fiber long axis will modify the extent of capillary lumen diameter change due to lengthening muscle fiber. During passive stretching in human subjects, the relationship between changes in blood volume (determined by near-infrared spectroscopy: NIRS) and fascicle length differed among the three heads of triceps surae muscles with different fascicle length and pennation angle. Muscle thickness, muscle curvature, and muscle fascicle angle are potential determinants of intramuscular pressure during muscle contraction. Muscle circulation is impeded more in short bulging muscles with great curvature of fibers than in long slender muscles with less curvature. The different response of circulatory parameters across the synergist muscles in the calf and heterogeneity of muscle circulation in the same muscle were observed, partly due to the difference in the pennation angle of the muscle fascicle. The muscle architecture will influence venous outflow by changing the muscle pumping action. This is possibly an indirect way of modifying vasodilation due to difference in muscle architecture.

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Blood Flow during Muscle Contraction and Relaxation in Rhythmic Exercise at Different Intensities.

Cited by 38 publications

References 14 publications

Muscle metabolism from near infrared spectroscopy during rhythmic handgrip in humans

Muscle metabolism from near infrared spectroscopy during rhythmic handgrip in humans

Noninvasive optical quantification of absolute blood flow, blood oxygenation, and oxygen consumption rate in exercising skeletal muscle

Muscle Architecture and its Relationship to Muscle Circulation

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