Abstract
INTRODUCTION: Even though age-related decline in physical function can be counteracted to an extent through resistance training, most researchers agree that an adequate amount of amino acids are necessary in order to facilitate training related adaptations. Results of earlier studies on combination of resistance training and protein supplementation on functional outcomes in frail elderly are quite heterogeneous. Therefore, the purpose of this systematic review was to investigate the additional effects of combining protein supplementation to resistance training on functional parameters in frail elderly.
METHODS: Systematic search was conducted using PubMed, EMBASE, and Cochrane Library in October 2019. CASP-checklists and Cochranes Risk of Bias-tool were used to determine the risk of bias.
RESULTS: A total of 10 randomized controlled trials were included (N=785, 176 males; 609 females) with participants between the age group of 80,1 ± 4,2 years. The duration of intervention was 8-24 weeks. Resistance training for the lower extremities using rubber bands or training machines was conducted 2-7 times per week. All the included studies used whey protein, soja protein or multi-ingredient supplements with high protein content. Supplementation was on daily basis in most studies with intakes ranging from 7.1-20.7 g. protein. None of the studies controlled for the total daily energy intake.
No additional effect of resistance training was observed with protein supplementation on 30-sec sit to stand-test, 5x sit to stand-test, FIM-motor score-test, 6MWT, and gait speed test (p>0,05).
CONCLUSION: The findings of this study suggest that protein supplementation to resistance training has no additional benefits on functional parameters of frail elderly compared to only resistance training. However, there is a potential risk of bias in most of the included studies as the daily energy intake was not controlled.
METHODS: Systematic search was conducted using PubMed, EMBASE, and Cochrane Library in October 2019. CASP-checklists and Cochranes Risk of Bias-tool were used to determine the risk of bias.
RESULTS: A total of 10 randomized controlled trials were included (N=785, 176 males; 609 females) with participants between the age group of 80,1 ± 4,2 years. The duration of intervention was 8-24 weeks. Resistance training for the lower extremities using rubber bands or training machines was conducted 2-7 times per week. All the included studies used whey protein, soja protein or multi-ingredient supplements with high protein content. Supplementation was on daily basis in most studies with intakes ranging from 7.1-20.7 g. protein. None of the studies controlled for the total daily energy intake.
No additional effect of resistance training was observed with protein supplementation on 30-sec sit to stand-test, 5x sit to stand-test, FIM-motor score-test, 6MWT, and gait speed test (p>0,05).
CONCLUSION: The findings of this study suggest that protein supplementation to resistance training has no additional benefits on functional parameters of frail elderly compared to only resistance training. However, there is a potential risk of bias in most of the included studies as the daily energy intake was not controlled.
| Original language | Danish |
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| Publication date | 2020 |
| Number of pages | 1 |
| Publication status | Published - 2020 |
| Event | 25th Annual Virtual Congress of the European College of Sports Science - Virtual, Sevilla, Spain Duration: 28 Oct 2020 → 30 Oct 2020 Conference number: 25 http://ecss-congress.eu/2020/20/index.php |
Conference
| Conference | 25th Annual Virtual Congress of the European College of Sports Science |
|---|---|
| Number | 25 |
| Location | Virtual |
| Country/Territory | Spain |
| City | Sevilla |
| Period | 28/10/20 → 30/10/20 |
| Internet address |