<i>Comparison of Blood Volume During Physical Conditioning, Heat Acclimatization and Sedentary Living</i>

Bass, David E.; Buskirk, E. R.; Iampietro, P. F.; Mager, Milton

doi:10.1152/jappl.1958.12.2.186

Cited by 38 publications

(20 citation statements)

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“…volume from plasma volume measured by Evans blue After 8 wk of training, a 4% increase in erythrocyte and measuring erythrocyte volume using the carbon volume was apparent compared with before training. monoxide technique, both result in overestimates be-This finding agrees with those of others who have obcause the volume of distribution for both of those tracers served modest increases in erythrocyte volume asso-"is not strictly limited to the vascular space (5,20). ciated with endurance training and improved aerobic fitAn increase in plasma volume has been observed in ness (22).…”

supporting

confidence: 89%

Role of thermal factors on aerobic capacity improvements with endurance training

Young

Sawka²,

Quigley³

et al. 1993

Journal of Applied Physiology

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YOUNG, ANDREW J., MICHAEL N. SAWKA, MARK D. QUIG-then training in hot water might produce different adap-LEY, BRUCE S. CADARETTE, P. DARRELL NEUFER, RICHARD C. tations than training in cold water. DENNIS, AND C. ROBERT VALERI. Role of thermal factors on aer-For example, accumulation of muscle metabolites durobic capacity improvements with endurance training. J. Appl. ing exercise is more pronounced in hot than cool environPhysiol. 75(1): [49][50][51][52][53][54] 1993.-This investigation studied the im-mental conditions, possibly as a result of effects of eleportance of the rise in body temperature during exercise for vated muscle temperature or a redistribution of blood aerobic capacity adaptations produced by endurance training. muscle tempe rate or a edistribu tiono The approach used was to compare training effects produced flow from muscle to skin on rates of metabolic reactions by subjects exercising in hot (35°C) water vs. cold (20'C) water. (27). It has been theorized that one stimulus for trainingHot water was used to potentiate, and cold water to blunt, the induced adaptations in muscle metabolism is the alterrise in body temperature during exercise. Eighteen young men ation in intracellular homeostasis that occurs during trained by cycle-ergometer exercise at 60% of maximal oxygen muscular activity as cellular metabolism generates enuptake (Vo 2 .. ) while immersed to the neck in either hot ergy to sustain the contractile process (12). Therefore, (HWT, n = 9) or cold (CWT, n = 9) water for 60 min, 5 days/ during exercise in hot water a more pronounced alterwk, for 8 wk. Before and after training, Vo,,..., erythrocyte ation in intracellular homeostasis compared with exervolume, plasma volume, and vastus lateralis citrate synthase cise in cold water might augment the stimulus for metaactivity were measured. Training increased (P < 0.01) V0 2 ... bolic adaptations to training. Also, whereas cardiac outby 13%, with no difference between HWT and CWT in the magnitude of the effect. Erythrocyte volume increased 4% (P < put during exercise at a given oxygen uptake (V0 2 ) is the 0.01) with training, with no difference between HWT and CWT same in cold and hot water, heart rate is lower, but stroke in the magnitude of the effect. Plasma volume remained un-volume higher, during exercise in cold than hot water changed by training in both the HWT and CWT groups. Last, (17). These differences could cause adaptations in carvastus lateralis citrate synthase activity increased by 38% with diac responses to exercise that differ from endurance training, but there was no difference between HWT and CWT training in hot vs. cold water. Furthermore, endurance in the training effect. Thus, exercisc-induced body temperature training reportedly results in an increase in blood volume elevations are not an important stimulus for the aerobic adapta-due to an increase in plasma and erythrocyte volume (7). tions to moderate-intensity endurance training.Hypervolemia and plasma volume expansion have also been observed to result from rep...

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supporting

confidence: 89%

Role of thermal factors on aerobic capacity improvements with endurance training

Young

Sawka²,

Quigley³

et al. 1993

Journal of Applied Physiology

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“…Further, if venous pressure is unchanged and the venous pressure-volume curve is lowered by some stimulus, then it may be concluded that the naturally occurring volume of the veins of the forearm is lower (6). When the blood volume is unchanged, as was true of the basal blood volume in experiments similar to those of the present study (8), the further conclusion that blood has shifted from the veins of the forearm to some other area is reasonable. (14).…”

Section: Discussionsupporting

confidence: 65%

“…Present address: Department of Medicine, Medical College of Georgia, Augusta, Ga. be due either to constriction of the peripheral veins (5)(6)(7) or to an increased blood volume. It has been found, however, that an increase in blood volume need not accompany acclimatization to heat in man (8). Regarding cardiac output, an altered distribution might result from a reduction of the flow of blood in the skin and skeletal muscles.…”

mentioning

confidence: 99%

Responses of the Veins and Arterioles of the Forearm to Walking During Acclimatization to Heat in Man *

Wood¹,

Bass²

1960

J. Clin. Invest.

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“…This supports Sjdstrand's hypothesis (39) that Vrbc is primarily dependent on total muscle mass and, equally well, the thesis that blood volume may be more dependent on lean than on total body mass. In contrast, Bass, Buskirk, Jampietro and Mager (22) found no increase in Vpl or Vrbc after three weeks of vigorous physical conditioning and Buskirk (23) was unable to demonstrate differences in Vpl or Vwb per unit of total or fat-free body weight in moderately or rigorously trained athletes and nonathletes. The demonstration by Kjellberg, Rudhe and Sjdstrand (21) of large differences between the blood volumes of athletically trained and untrained persons requires re-examination.…”

Section: Dicussionmentioning

confidence: 93%

“…Gregersen and Nickerson (3) classified subjects according to somatotype and found that variance of blood volume per unit of body surface area was reduced to an important degree when dealing with extreme body types but not in the middle ranges. Divergent results have been reported concerning the influence of age and of physical training on blood volume (2,(18)(19)(20)(21)(22)(23).…”

mentioning

confidence: 99%

RED CELL, PLASMA AND BLOOD VOLUME IN HEALTHY MEN MEASURED BY RADIOCHROMIUM (Cr51) CELL TAGGING AND HEMATOCRIT: INFLUENCE OF AGE, SOMATOTYPE AND HABITS OF PHYSICAL ACTIVITY ON THE VARIANCE AFTER REGRESSION OF VOLUMES TO HEIGHT AND WEIGHT COMBINED*

Wennesland¹,

Em²,

Hopper³

et al. 1959

J. Clin. Invest.

194

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Comparison of Blood Volume During Physical Conditioning, Heat Acclimatization and Sedentary Living

Cited by 38 publications

References 0 publications

Role of thermal factors on aerobic capacity improvements with endurance training

Role of thermal factors on aerobic capacity improvements with endurance training

Responses of the Veins and Arterioles of the Forearm to Walking During Acclimatization to Heat in Man *

RED CELL, PLASMA AND BLOOD VOLUME IN HEALTHY MEN MEASURED BY RADIOCHROMIUM (Cr51) CELL TAGGING AND HEMATOCRIT: INFLUENCE OF AGE, SOMATOTYPE AND HABITS OF PHYSICAL ACTIVITY ON THE VARIANCE AFTER REGRESSION OF VOLUMES TO HEIGHT AND WEIGHT COMBINED*

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