| Title |
Intake of a protein-enriched milk and effects on muscle mass and strength. A 12-week randomized placebo controlled trial among community-dwelling older adults
|
|---|---|
| Published in |
The journal of nutrition, health & aging, December 2017
|
| DOI | 10.1007/s12603-016-0856-1 |
| Pubmed ID | |
| Authors |
Inger Ottestad, A.T. Løvstad, G.O. Gjevestad, H. Hamarsland, J. Šaltytė Benth, L.F. Andersen, A. Bye, A.S. Biong, K. Retterstøl, P.O. Iversen, T. Raastad, S.M. Ulven, K.B. Holven |
| Abstract |
To investigate the effect of 20 g protein with breakfast and evening meal on muscle mass, muscle strength and functional performance in older adults. A double-blinded randomized controlled study. Oslo and Akershus University College of Applied Sciences, Norway. Healthy community-dwelling men and women (≥ 70 years) with reduced physical strength and/or performance. Subjects were randomly assigned to receive either protein-enriched milk (2 x 0.4 L/d; protein group) or an isocaloric carbohydrate drink (2 x 0.4 L/d; control group) with breakfast and evening meal for 12 weeks. The primary endpoints were muscle mass measured by dual X-ray absorptiometry, and tests of muscle strength (one repetition maximum test of chest press and leg press) and functional performance (handgrip strength, stair calimb and repeated chair rise). In total, 438 subjects were screened, 50 subjects were randomized and 36 completed the study. Chest press improved significantly in the protein (1.3 kg (0.1-2.5), p=0.03) and the control group (1.5 kg (0.0-3.0), p=0.048), but with no difference between the groups (p=0.85). No significant change in leg press (p=0.93) or muscle mass (p=0.54) were observed between the protein and the control group. Nor did we observe any significant differences in the functional performance tests (p>0.05 for all tests) between the groups. Increased protein intake (2 x 20 g/d) did not significantly improve muscle mass, muscle strength or functional performance in healthy older weight stable adults. Whether intake of > 20 g protein to each meal is necessary for preservation of muscle mass and strength in older adults should be further investigated in a larger study. This underscores the need for well-designed studies that can differentiate between the effect of protein intake and increased energy. This trial was registered at Clinicaltrials.gov (ID no. NCT02218333). |
X Demographics
The data shown below were collected from the profiles of 7 X users who shared this research output. Click here to find out more about how the information was compiled.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Australia | 2 | 29% |
| Brazil | 1 | 14% |
| Belgium | 1 | 14% |
| Unknown | 3 | 43% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Scientists | 5 | 71% |
| Practitioners (doctors, other healthcare professionals) | 1 | 14% |
| Members of the public | 1 | 14% |
Mendeley readers
The data shown below were compiled from readership statistics for 85 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Unknown | 85 | 100% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Bachelor | 12 | 14% |
| Student > Master | 11 | 13% |
| Researcher | 9 | 11% |
| Student > Ph. D. Student | 4 | 5% |
| Professor | 4 | 5% |
| Other | 12 | 14% |
| Unknown | 33 | 39% |
| Readers by discipline | Count | As % |
|---|---|---|
| Medicine and Dentistry | 13 | 15% |
| Nursing and Health Professions | 12 | 14% |
| Sports and Recreations | 7 | 8% |
| Social Sciences | 5 | 6% |
| Biochemistry, Genetics and Molecular Biology | 3 | 4% |
| Other | 9 | 11% |
| Unknown | 36 | 42% |
Attention Score in Context
This research output has an Altmetric Attention Score of 4. 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 03 December 2017.
All research outputs
#8,034,518
of 25,728,855 outputs
Outputs from The journal of nutrition, health & aging
#988
of 2,003 outputs
Outputs of similar age
#144,814
of 447,187 outputs
Outputs of similar age from The journal of nutrition, health & aging
#32
of 63 outputs
Altmetric has tracked 25,728,855 research outputs across all sources so far. This one has received more attention than most of these and is in the 68th percentile.
So far Altmetric has tracked 2,003 research outputs from this source. They typically receive a lot more attention than average, with a mean Attention Score of 13.0. This one has gotten more attention than average, scoring higher than 50% 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 447,187 tracked outputs that were published within six weeks on either side of this one in any source. This one has gotten more attention than average, scoring higher than 67% of its contemporaries.
We're also able to compare this research output to 63 others from the same source and published within six weeks on either side of this one. This one is in the 49th percentile – i.e., 49% of its contemporaries scored the same or lower than it.