| Title |
The responses of the catecholamines and β-endorphin to brief maximal exercise in man
|
|---|---|
| Published in |
European Journal of Applied Physiology, March 1988
|
| DOI | 10.1007/bf00640668 |
| Pubmed ID | |
| Authors |
Stephen Brooks, Jacky Burrin, Mary E. Cheetham, George M. Hall, Tom Yeo, Clyde Williams |
| Abstract |
The responses to brief maximal exercise of 10 male subjects have been studied. During 30 s of exercise on a non-motorized treadmill, the mean power output (mean +/- SD) was 424.8 +/- 41.9 W, peak power 653.3 +/- 103.0 W and the distance covered was 167.3 +/- 9.7 m. In response to the exercise blood lactate concentrations increased from 0.60 +/- 0.26 to 13.46 +/- 1.71 mmol.l-1 (p less than 0.001) and blood glucose concentrations from 4.25 +/- 0.45 to 5.59 +/- 0.67 mmol.l-1 (p less than 0.001). The severe nature of the exercise is indicated by the fall in blood pH from 7.38 +/- 0.02 to 7.16 +/- 0.07 (p less than 0.001) and the estimated decrease in plasma volume of 11.5 +/- 3.4% (p less than 0.001). The plasma catecholamine concentrations increased from 2.2 +/- 0.6 to 13.4 +/- 6.4 nmol.l-1 (p less than 0.001) and 0.2 +/- 0.2 to 1.4 +/- 0.6 nmol.l-1 (p less than 0.001) for noradrenaline (NA) and adrenaline (AD) respectively. The plasma concentration of the opioid beta-endorphin increased in response to the exercise from less than 5.0 to 10.2 +/- 3.9 p mol.l-1. The post-exercise AD concentrations correlated with those for lactate as well as with changes in pH and the decrease in plasma volume. Post-exercise beta-endorphin levels correlated with the peak speed attained during the sprint and the subjects peak power to weight ratio. These results suggest that the increases in plasma adrenaline are related to those factors that reflect the stress of the exercise and the contribution of anaerobic metabolism.(ABSTRACT TRUNCATED AT 250 WORDS) |
X Demographics
The data shown below were collected from the profile of 1 X user who shared this research output. Click here to find out more about how the information was compiled.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Unknown | 1 | 100% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Members of the public | 1 | 100% |
Mendeley readers
The data shown below were compiled from readership statistics for 9 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Denmark | 1 | 11% |
| Unknown | 8 | 89% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Doctoral Student | 2 | 22% |
| Student > Ph. D. Student | 2 | 22% |
| Professor > Associate Professor | 2 | 22% |
| Researcher | 2 | 22% |
| Student > Master | 1 | 11% |
| Other | 0 | 0% |
| Readers by discipline | Count | As % |
|---|---|---|
| Sports and Recreations | 3 | 33% |
| Biochemistry, Genetics and Molecular Biology | 1 | 11% |
| Agricultural and Biological Sciences | 1 | 11% |
| Medicine and Dentistry | 1 | 11% |
| Neuroscience | 1 | 11% |
| Other | 1 | 11% |
| Unknown | 1 | 11% |
Attention Score in Context
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All research outputs
#22,758,309
of 25,373,627 outputs
Outputs from European Journal of Applied Physiology
#4,069
of 4,345 outputs
Outputs of similar age
#11,999
of 12,255 outputs
Outputs of similar age from European Journal of Applied Physiology
#9
of 13 outputs
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