| Title |
Influence of exercise duration on post-exercise steroid hormone responses in trained males
|
|---|---|
| Published in |
European Journal of Applied Physiology, June 2005
|
| DOI | 10.1007/s00421-005-1380-x |
| Pubmed ID | |
| Authors |
Mark S. Tremblay, Jennifer L. Copeland, Walter Van Helder |
| Abstract |
The purpose of this study was to systematically evaluate the effect of endurance exercise duration on hormone concentrations in male subjects while controlling for exercise intensity and training status. Eight endurance-trained males (19-49 years) completed a resting control session and three treadmill runs of 40, 80, and 120 min at 55% of VO2max . Blood samples were drawn before the session and then 1, 2, 3 and 4 h after the start of the run. Plasma was analyzed for luteinizing hormone (LH), dehydroepiandrosterone sulfate (DHEAS), cortisol, and free and total testosterone. LH was significantly greater at rest compared to the running sessions. Both free and total testosterone generally increased in the first hour of the 80 and 120 min runs and then showed a trend for a steady decline for the next 3 h of recovery. Dehydroepiandrosterone sulfate increased in a dose-response manner with the greatest increases observed during the 120-min run, followed by the 80-min run. Cortisol only increased in response to the 120-min run and showed a decline across time in all other sessions. The ratios of anabolic hormones (testosterone and DHEAS) to cortisol were greater during the resting session and the 40-min run compared to the longer runs. The results indicate that exercise duration has independent effects on the hormonal response to endurance exercise. At a low intensity, longer duration runs are necessary to stimulate increased levels of testosterone, DHEAS and cortisol and beyond 80 min of running there is a shift to a more catabolic hormonal environment. |
X Demographics
The data shown below were collected from the profiles of 19 X users who shared this research output. Click here to find out more about how the information was compiled.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Japan | 6 | 32% |
| Kuwait | 1 | 5% |
| United States | 1 | 5% |
| South Africa | 1 | 5% |
| Unknown | 10 | 53% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Members of the public | 17 | 89% |
| Practitioners (doctors, other healthcare professionals) | 2 | 11% |
Mendeley readers
The data shown below were compiled from readership statistics for 114 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Germany | 1 | <1% |
| Malaysia | 1 | <1% |
| United Kingdom | 1 | <1% |
| Mexico | 1 | <1% |
| Spain | 1 | <1% |
| Unknown | 109 | 96% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Ph. D. Student | 21 | 18% |
| Student > Master | 16 | 14% |
| Researcher | 15 | 13% |
| Professor | 12 | 11% |
| Student > Doctoral Student | 8 | 7% |
| Other | 25 | 22% |
| Unknown | 17 | 15% |
| Readers by discipline | Count | As % |
|---|---|---|
| Sports and Recreations | 39 | 34% |
| Medicine and Dentistry | 13 | 11% |
| Psychology | 9 | 8% |
| Agricultural and Biological Sciences | 7 | 6% |
| Biochemistry, Genetics and Molecular Biology | 7 | 6% |
| Other | 20 | 18% |
| Unknown | 19 | 17% |
Attention Score in Context
This research output has an Altmetric Attention Score of 15. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 12 February 2023.
All research outputs
#2,411,551
of 25,622,179 outputs
Outputs from European Journal of Applied Physiology
#791
of 4,378 outputs
Outputs of similar age
#4,076
of 68,054 outputs
Outputs of similar age from European Journal of Applied Physiology
#2
of 22 outputs
Altmetric has tracked 25,622,179 research outputs across all sources so far. Compared to these this one has done particularly well and is in the 90th percentile: it's in the top 10% of all research outputs ever tracked by Altmetric.
So far Altmetric has tracked 4,378 research outputs from this source. They typically receive a lot more attention than average, with a mean Attention Score of 14.7. This one has done well, scoring higher than 81% of its peers.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 68,054 tracked outputs that were published within six weeks on either side of this one in any source. This one has done particularly well, scoring higher than 94% of its contemporaries.
We're also able to compare this research output to 22 others from the same source and published within six weeks on either side of this one. This one has done particularly well, scoring higher than 95% of its contemporaries.