| Title |
Muscle metabolism during intense, heavy-resistance exercise
|
|---|---|
| Published in |
European Journal of Applied Physiology, August 1986
|
| DOI | 10.1007/bf00422734 |
| Pubmed ID | |
| Authors |
Per A. Tesch, Erland B. Colliander, Peter Kaiser |
| Abstract |
The objective of this study was to examine the muscle metabolic changes occurring during intense and prolonged, heavy-resistance exercise. Muscle biopsies were obtained from the vastus lateralis of 9 strength trained athletes before and 30 s after an exercise regimen comprising 5 sets each of front squats, back squats, leg presses and knee extensions using barbell or variable resistance machines. Each set was executed until muscle failure, which occurred within 6-12 muscle contractions. The exercise: rest ratio was approximately 1:2 and the total performance time was 30 min. Concentrations of adenosine triphosphate (ATP), creatine phosphate (CP), creatine, glycogen, glucose, glucose-6-phosphate (G-6-P), alpha-glycerophosphate (alpha-G-P) and lactate were determined on freeze-dried tissue samples using fluorometric assays. Blood samples were analyzed for lactate and glucose. The exercise produced significant reductions in ATP (p less than 0.01) and CP (p less than 0.001), while alpha-G-P more than doubled (p less than 0.05), glucose increased tenfold (p less than 0.001) and G-6-P fourfold (p less than 0.001). Muscle lactate concentration at cessation of exercise averaged 17.3 mmol X kg-1 w. w. Glycogen concentration decreased (p less than 0.001) from 160 to 118 mmol X kg-1 w. w. It is concluded that high intensity, heavy resistance exercise is associated with a high rate of energy utilization through phosphagen breakdown and activation of glycogenolysis. |
X Demographics
The data shown below were collected from the profiles of 13 X users who shared this research output. Click here to find out more about how the information was compiled.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Spain | 2 | 15% |
| United States | 1 | 8% |
| Sweden | 1 | 8% |
| Norway | 1 | 8% |
| Australia | 1 | 8% |
| Chile | 1 | 8% |
| Canada | 1 | 8% |
| Unknown | 5 | 38% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Members of the public | 7 | 54% |
| Scientists | 3 | 23% |
| Practitioners (doctors, other healthcare professionals) | 3 | 23% |
Mendeley readers
The data shown below were compiled from readership statistics for 234 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| United States | 2 | <1% |
| Spain | 2 | <1% |
| Hong Kong | 1 | <1% |
| Canada | 1 | <1% |
| Brazil | 1 | <1% |
| United Kingdom | 1 | <1% |
| Denmark | 1 | <1% |
| Unknown | 225 | 96% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Master | 42 | 18% |
| Student > Bachelor | 42 | 18% |
| Student > Ph. D. Student | 31 | 13% |
| Student > Doctoral Student | 16 | 7% |
| Researcher | 15 | 6% |
| Other | 35 | 15% |
| Unknown | 53 | 23% |
| Readers by discipline | Count | As % |
|---|---|---|
| Sports and Recreations | 94 | 40% |
| Medicine and Dentistry | 25 | 11% |
| Nursing and Health Professions | 16 | 7% |
| Agricultural and Biological Sciences | 14 | 6% |
| Biochemistry, Genetics and Molecular Biology | 11 | 5% |
| Other | 13 | 6% |
| Unknown | 61 | 26% |
Attention Score in Context
This research output has an Altmetric Attention Score of 25. 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 18 January 2024.
All research outputs
#1,576,040
of 25,734,859 outputs
Outputs from European Journal of Applied Physiology
#501
of 4,387 outputs
Outputs of similar age
#127
of 10,426 outputs
Outputs of similar age from European Journal of Applied Physiology
#2
of 5 outputs
Altmetric has tracked 25,734,859 research outputs across all sources so far. Compared to these this one has done particularly well and is in the 93rd percentile: it's in the top 10% of all research outputs ever tracked by Altmetric.
So far Altmetric has tracked 4,387 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 88% 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 10,426 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 98% of its contemporaries.
We're also able to compare this research output to 5 others from the same source and published within six weeks on either side of this one. This one has scored higher than 3 of them.