Effects of exercise intensity and duration on norepinephrine spillover and clearance in humans

Leuenberger, Urs A.; Sinoway, Lawrence I.; Gubin, Steven S.; Gaul, Lawrence; Davis, Dwight; Zelis, Robert

doi:10.1152/jappl.1993.75.2.668

Cited by 62 publications

(34 citation statements)

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“…Leuenberger et al (1993) reported higher spillover and lower clearance of norepinephrine after moderate-to highintensity aerobic exercise. Indeed, heightened norepinephrine discharge from nerve endings, in conjunction with lower clearance from the circulation, can lead to greater serum levels of this hormone, which could account for the improved beta-adrenergic stimulation (Yoshika et al 2001) and elevation in REE (Pratley et al 1994).…”

Section: Discussionmentioning

confidence: 93%

The effects of a single bout of exercise on resting energy expenditure and respiratory exchange ratio

Jamurtas

Koutedakis

Paschalis³

et al. 2004

Eur J Appl Physiol

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We investigated the effects of a single bout of aerobic and resistance exercise of similar relative intensity and duration on resting energy expenditure (REE) and substrate utilisation. Ten young healthy males volunteered [age 22 (1.8) years, weight 76 (7.9) kg, height 176 (4.1) cm, percentage body fat 10.5 (4.0)%; mean (SEM)]. They randomly underwent three conditions in which they either lifted weights for 60 min at 70-75% of 1-RM (WL), ran for 60 min at 70-75% of maximal oxygen intake (R) or did not exercise (C). REE and substrate utilisation, determined via respiratory exchange ratio (R), were measured prior to exercise, and 10, 24, 48 and 72 h post-exercise. It was revealed that REE was significantly elevated (P<0.05) 10 and 24 h after the end of WL [2,124 (78) .04), respectively]. Creatine kinase was significantly elevated (P<0.05) 24 h after both WL and R, whereas delayed onset muscle soreness became significantly elevated (P<0.05) 24 h after only WL. There were no significant changes for any treatment in thyroid hormones (T 3 and T 4 ). These results suggest that a single bout of either WL or R exercise, characterised by the same relative intensity and duration, increase REE and fat oxidation for at least 24 h post-exercise.

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Section: Discussionmentioning

confidence: 93%

The effects of a single bout of exercise on resting energy expenditure and respiratory exchange ratio

Jamurtas

Koutedakis

Paschalis³

et al. 2004

Eur J Appl Physiol

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“…Indeed, an increased gradient of circulating FFA might promote greater lipid utilization. 36,37 In this sense, since glycerol levels (a lipolytic index) during exercise are predicted by plasma noradrenaline 38 and that SNS activation has been shown to be related to exercise intensity, 39 the greater fat oxidation following the high-intensity session might be indirectly related to the greater SNS activation during this type of exercise, which ultimately produces increased levels of circulating FFA in the postexercise-postprandial condition. Another possibility for the increased contribution of fat to the production of energy in response to exercise might be related to the status of glycogen stores following exercise.…”

Section: Discussionmentioning

confidence: 99%

Impact of high-intensity exercise on energy expenditure, lipid oxidation and body fatness

et al. 2001

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OBJECTIVE: Two studies were conducted to assess the potential of an increase in exercise intensity to alter energy and lipid metabolism and body fatness under conditions mimicking real life. METHODS: Study 1 was based on the comparison of adiposity markers obtained in 352 male healthy adults who participated in the Que Âbec Family Study who either regularly participated in high-intensity physical activities or did not. Study 2 was designed to determine the effects of high-intensity exercise on post-exercise post-prandial energy and lipid metabolism as well as the contribution of b-adrenergic stimulation to such differences under a real-life setting. RESULTS: Results from Study 1 showed that men who regularly take part in intense physical activities display lower fat percentage and subcutaneous adiposity than men who never perform such activities, and this was true even if the latter group reported a lower energy intake (917 kJaday, P`0.05). In Study 2, the high-intensity exercise stimulus produced a greater postexercise post-prandial oxygen consumption as well as fat oxidation than the resting session, an effect which disappeared with the addition of propranolol. In addition, the increase in post-prandial oxygen consumption observed after the high-intensity exercise session was also signi®cantly greater than that promoted by the low-intensity exercise session. CONCLUSION: These results suggest that high-intensity exercise favors a lesser body fat deposition which might be related to an increase in post-exercise energy metabolism that is mediated by b-adrenergic stimulation.

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“…It has been well established that the magnitude of neural and hemodynamic responses during exercise is directly related to exercise intensity (22,23). Thus, it is possible that different exercise intensities have also distinct effects on cardiovascular changes after exercise.…”

Section: Introductionmentioning

confidence: 99%

Post-exercise changes in blood pressure, heart rate and rate pressure product at different exercise intensities in normotensive humans

Forjaz¹,

Matsudaira²,

Rodrigues³

et al. 1998

Braz J Med Biol Res

132

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To evaluate the effect of exercise intensity on post-exercise cardiovascular responses, 12 young normotensive subjects performed in a randomized order three cycle ergometer exercise bouts of 45 min at 30, 50 and 80% of VO 2 peak, and 12 subjects rested for 45 min in a nonexercise control trial. Blood pressure (BP) and heart rate (HR) were measured for 20 min prior to exercise (baseline) and at intervals of 5 to 30 (R5-30), 35 to 60 (R35-60) and 65 to 90 (R65-90) min after exercise. Systolic, mean, and diastolic BP after exercise were significantly lower than baseline, and there was no difference between the three exercise intensities. After exercise at 30% of VO 2 peak, HR was significantly decreased at R35-60 and R65-90. In contrast, after exercise at 50 and 80% of VO 2 peak, HR was significantly increased at R5-30 and R35-60, respectively. Exercise at 30% of VO 2 peak significantly decreased rate pressure (RP) product (RP = HR x systolic BP) during the entire recovery period (baseline = 7930 ± 314 vs R5-30 = 7150 ± 326, R35-60 = 6794 ± 349, and R65-90 = 6628 ± 311, P<0.05), while exercise at 50% of VO 2 peak caused no change, and exercise at 80% of VO 2 peak produced a significant increase at R5-30 (7468 ± 267 vs 9818 ± 366, P<0.05) and no change at R35-60 or R65-90. Cardiovascular responses were not altered during the control trial. In conclusion, varying exercise intensity from 30 to 80% of VO 2 peak in young normotensive humans did not influence the magnitude of post-exercise hypotension. However, in contrast to exercise at 50 and 80% of VO 2 peak, exercise at 30% of VO 2 peak decreased post-exercise HR and RP. Correspondence

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Effects of exercise intensity and duration on norepinephrine spillover and clearance in humans

Cited by 62 publications

References 0 publications

The effects of a single bout of exercise on resting energy expenditure and respiratory exchange ratio

The effects of a single bout of exercise on resting energy expenditure and respiratory exchange ratio

Impact of high-intensity exercise on energy expenditure, lipid oxidation and body fatness

Post-exercise changes in blood pressure, heart rate and rate pressure product at different exercise intensities in normotensive humans

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