| Title |
Hormonal responses to high- and moderate-intensity strength exercise
|
|---|---|
| Published in |
European Journal of Applied Physiology, May 2000
|
| DOI | 10.1007/s004210050661 |
| Pubmed ID | |
| Authors |
Truls Raastad, Trine Bjøro, Jostein Hallén |
| Abstract |
The hormonal responses of nine male, strength athletes to strength exercise were examined. The athletes performed one moderate- and one high-intensity strength exercise workout. In the high-intensity workout, the load was 100% of each subject's three-repetition maximum (3-RM) for squats and front squats, and 100% of each subject's six-repetition maximum (6-RM) for leg extensions. In the moderate-intensity workout, the load was 70% of the high-intensity protocol. Rest periods between sets were 4-6 min for both workouts. Blood samples were taken before, 30 min into, and every 15 min for the 1st h after exercise, and then 3, 7, 11, 22 and 33 h after exercise, thus allowing examination of both the acute and prolonged hormonal responses. Blood samples were analyzed for testosterone, luteinizing hormone (LH), follicle stimulating hormone (FSH), cortisol, adrenocorticotrophic hormone (ACTH), growth hormone (GH), insulin-like growth factor (IGF-1), insulin, sex hormone binding globulin, creatine kinase, total protein, glucose and lactate. The acute responses of testosterone and cortisol were greater during the high-intensity protocol as compared to the moderate-intensity protocol. The cortisol response was associated with an increase in ACTH concentration. LH and FSH showed no response to either protocol. Acute GH responses were not different between protocols. There were great inter-individual differences in acute GH responses to both protocols. There were no significant differences between protocols with regard to prolonged responses for any hormone. In both trials, IGF-1 concentrations were significantly lower at 0800 hours the morning after exercise as compared to concentrations found at 0800 hours the morning before exercise. The mechanisms responsible for reducing IGF-1 concentration in these trials are unclear, and it is not known if this reduction observed 22 hours after exercise is of physiological significance. |
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 % |
|---|---|---|
| United States | 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 177 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Brazil | 5 | 3% |
| Hungary | 1 | <1% |
| Chile | 1 | <1% |
| Germany | 1 | <1% |
| Canada | 1 | <1% |
| United States | 1 | <1% |
| Unknown | 167 | 94% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Master | 44 | 25% |
| Student > Ph. D. Student | 26 | 15% |
| Student > Bachelor | 25 | 14% |
| Professor | 12 | 7% |
| Researcher | 12 | 7% |
| Other | 37 | 21% |
| Unknown | 21 | 12% |
| Readers by discipline | Count | As % |
|---|---|---|
| Sports and Recreations | 72 | 41% |
| Medicine and Dentistry | 26 | 15% |
| Agricultural and Biological Sciences | 20 | 11% |
| Biochemistry, Genetics and Molecular Biology | 8 | 5% |
| Nursing and Health Professions | 4 | 2% |
| Other | 24 | 14% |
| Unknown | 23 | 13% |
Attention Score in Context
This research output has an Altmetric Attention Score of 2. 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 17 June 2020.
All research outputs
#16,720,137
of 25,371,288 outputs
Outputs from European Journal of Applied Physiology
#3,226
of 4,345 outputs
Outputs of similar age
#37,653
of 40,855 outputs
Outputs of similar age from European Journal of Applied Physiology
#11
of 14 outputs
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