| Title |
Resistance training induced increase in muscle fiber size in young and older men
|
|---|---|
| Published in |
European Journal of Applied Physiology, August 2012
|
| DOI | 10.1007/s00421-012-2466-x |
| Pubmed ID | |
| Authors |
A. A. Mero, J. J. Hulmi, H. Salmijärvi, M. Katajavuori, M. Haverinen, J. Holviala, T. Ridanpää, K. Häkkinen, V. Kovanen, J. P. Ahtiainen, H. Selänne |
| Abstract |
Muscle strength and mass decline in sedentary individuals with aging. The present study investigated the effects of both age and 21 weeks of progressive hypertrophic resistance training (RT) on skeletal muscle size and strength, and on myostatin and myogenin mRNA expression in 21 previously untrained young men (26.0 ± 4.3 years) and 18 older men (61.2 ± 4.1 years) and age-matched controls. Vastus lateralis muscle biopsies were taken before and after RT. Type I and type II muscle fiber cross-sectional areas increased more in young men than in older men after RT (P < 0.05). Concentric leg extension increased (P < 0.05) more after 10.5 weeks in young men compared to older men, but after 21 weeks no statistical differences existed. The daily energy and protein intake were greater (P < 0.001) in young subjects. Both myostatin and myogenin mRNA expression increased in older when compared with young men after RT (P < 0.05). In conclusion, after RT, muscle fiber size increased less in older compared to young men. This was associated with lower protein and energy intake and increases in myostatin gene expression in older when compared to young men. |
X Demographics
The data shown below were collected from the profiles of 11 X users who shared this research output. Click here to find out more about how the information was compiled.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| United Kingdom | 3 | 27% |
| United States | 2 | 18% |
| Turkey | 1 | 9% |
| New Zealand | 1 | 9% |
| Norway | 1 | 9% |
| Unknown | 3 | 27% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Members of the public | 8 | 73% |
| Scientists | 2 | 18% |
| Practitioners (doctors, other healthcare professionals) | 1 | 9% |
Mendeley readers
The data shown below were compiled from readership statistics for 175 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Ireland | 2 | 1% |
| Switzerland | 1 | <1% |
| Brazil | 1 | <1% |
| Finland | 1 | <1% |
| Canada | 1 | <1% |
| Spain | 1 | <1% |
| United States | 1 | <1% |
| Unknown | 167 | 95% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Master | 29 | 17% |
| Student > Bachelor | 26 | 15% |
| Student > Ph. D. Student | 21 | 12% |
| Researcher | 18 | 10% |
| Student > Doctoral Student | 13 | 7% |
| Other | 31 | 18% |
| Unknown | 37 | 21% |
| Readers by discipline | Count | As % |
|---|---|---|
| Sports and Recreations | 57 | 33% |
| Medicine and Dentistry | 22 | 13% |
| Agricultural and Biological Sciences | 19 | 11% |
| Nursing and Health Professions | 11 | 6% |
| Social Sciences | 6 | 3% |
| Other | 17 | 10% |
| Unknown | 43 | 25% |
Attention Score in Context
This research output has an Altmetric Attention Score of 7. 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 21 December 2016.
All research outputs
#5,210,310
of 25,371,288 outputs
Outputs from European Journal of Applied Physiology
#1,407
of 4,345 outputs
Outputs of similar age
#36,211
of 187,099 outputs
Outputs of similar age from European Journal of Applied Physiology
#11
of 38 outputs
Altmetric has tracked 25,371,288 research outputs across all sources so far. Compared to these this one has done well and is in the 79th percentile: it's in the top 25% of all research outputs ever tracked by Altmetric.
So far Altmetric has tracked 4,345 research outputs from this source. They typically receive a lot more attention than average, with a mean Attention Score of 14.6. This one has gotten more attention than average, scoring higher than 67% 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 187,099 tracked outputs that were published within six weeks on either side of this one in any source. This one has done well, scoring higher than 80% of its contemporaries.
We're also able to compare this research output to 38 others from the same source and published within six weeks on either side of this one. This one has gotten more attention than average, scoring higher than 71% of its contemporaries.