The effects of dietary protein intake on appendicular lean mass and muscle function in elderly men: a 10-wk randomized controlled trial
The Recommended Daily Allowance (RDA) for protein intake in the adult population is widely promoted as 0.8 g · kg−1 · d−1. Aging may increase protein requirements, particularly to maintain muscle mass. We investigated whether controlled protein consumption at the current RDA or twice the RDA (2RDA)...
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| Veröffentlicht in: | The American journal of clinical nutrition 2017-12, Vol.106 (6), p.1375-1383 |
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| creator | Mitchell, Cameron J Milan, Amber M Mitchell, Sarah M Zeng, Nina Ramzan, Farha Sharma, Pankaja Knowles, Scott O Roy, Nicole C Sjödin, Anders Wagner, Karl-Heinz Cameron-Smith, David |
| description | The Recommended Daily Allowance (RDA) for protein intake in the adult population is widely promoted as 0.8 g · kg−1 · d−1. Aging may increase protein requirements, particularly to maintain muscle mass.
We investigated whether controlled protein consumption at the current RDA or twice the RDA (2RDA) affects skeletal muscle mass and physical function in elderly men.
In this parallel-group randomized trial, 29 men aged >70 y [mean ± SD body mass index (in kg/m2): 28.3 ± 4.2] were provided with a complete diet containing either 0.8 (RDA) or 1.6 (2RDA) g protein · kg−1 · d−1, aimed to balance energy needs. Before treatment and after 10 wk of intervention, whole-body and appendicular lean mass were measured by using dual-energy X-ray absorptiometry. Knee-extension peak power was measured with dynamometry.
Both groups were found to have been in a moderate negative energy balance (mean ± SD RDA: 209 ± 213 kcal/d; 2RDA 145 ± 214 kcal/d; P= 0.427 for difference between the groups). In comparison with RDA, whole-body lean mass increased in 2RDA (P = 0.001; 1.49 ± 1.30 kg, P < 0.001 compared with −0.55 ± 1.49 kg, P = 0.149). This difference was mostly accounted for by an increase in trunk lean mass found in 2RDA (+1.39 ± 1.09 kg, P < 0.001). Appendicular lean mass also decreased in RDA compared with 2RDA (P = 0.022), driven by a reduction in RDA (−0.64 ± 0.91 kg, P = 0.005 compared with 0.11 ± 0.57 kg, P = 0.592). Adjusting for energy imbalances did not alter these findings. Knee-extension peak power was also differently affected (P = 0.012; 26.6 ± 47.7 W, P = 0.015 in 2RDA compared with −11.7 ± 31.0 W, P = 0.180 in RDA).
Consumption of a diet providing 2RDA for protein compared with the current guidelines was found to have beneficial effects on lean body mass and leg power in elderly men. These effects were not explained by differences in energy balance. This trial was registered at the Australia New Zealand Clinical Trial Registry (www.anzctr.org.au) as ACTRN12616000310460. |
| doi_str_mv | 10.3945/ajcn.117.160325 |
| format | Article |
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We investigated whether controlled protein consumption at the current RDA or twice the RDA (2RDA) affects skeletal muscle mass and physical function in elderly men.
In this parallel-group randomized trial, 29 men aged >70 y [mean ± SD body mass index (in kg/m2): 28.3 ± 4.2] were provided with a complete diet containing either 0.8 (RDA) or 1.6 (2RDA) g protein · kg−1 · d−1, aimed to balance energy needs. Before treatment and after 10 wk of intervention, whole-body and appendicular lean mass were measured by using dual-energy X-ray absorptiometry. Knee-extension peak power was measured with dynamometry.
Both groups were found to have been in a moderate negative energy balance (mean ± SD RDA: 209 ± 213 kcal/d; 2RDA 145 ± 214 kcal/d; P= 0.427 for difference between the groups). In comparison with RDA, whole-body lean mass increased in 2RDA (P = 0.001; 1.49 ± 1.30 kg, P < 0.001 compared with −0.55 ± 1.49 kg, P = 0.149). This difference was mostly accounted for by an increase in trunk lean mass found in 2RDA (+1.39 ± 1.09 kg, P < 0.001). Appendicular lean mass also decreased in RDA compared with 2RDA (P = 0.022), driven by a reduction in RDA (−0.64 ± 0.91 kg, P = 0.005 compared with 0.11 ± 0.57 kg, P = 0.592). Adjusting for energy imbalances did not alter these findings. Knee-extension peak power was also differently affected (P = 0.012; 26.6 ± 47.7 W, P = 0.015 in 2RDA compared with −11.7 ± 31.0 W, P = 0.180 in RDA).
Consumption of a diet providing 2RDA for protein compared with the current guidelines was found to have beneficial effects on lean body mass and leg power in elderly men. These effects were not explained by differences in energy balance. This trial was registered at the Australia New Zealand Clinical Trial Registry (www.anzctr.org.au) as ACTRN12616000310460.</description><identifier>ISSN: 0002-9165</identifier><identifier>EISSN: 1938-3207</identifier><identifier>DOI: 10.3945/ajcn.117.160325</identifier><identifier>PMID: 29092886</identifier><language>eng</language><publisher>United States: Elsevier Inc</publisher><subject>Absorptiometry, Photon ; Aged ; Aged, 80 and over ; Aging - physiology ; Body Composition - drug effects ; Body Fluid Compartments - drug effects ; Body Mass Index ; Body size ; Consumption ; Diet ; Dietary intake ; dietary protein ; Dietary Proteins - administration & dosage ; Dietary Proteins - pharmacology ; Energy balance ; Energy Intake ; Energy measurement ; Energy Metabolism ; Feeding Behavior ; Humans ; Intervention ; Knee ; Leg ; Male ; Men ; Muscle Strength - drug effects ; Muscle, Skeletal - drug effects ; Muscles ; nutrient requirements ; Nutrition ; Nutritional Requirements ; older adults ; Older people ; Organ Size ; Proteins ; Recommended Dietary Allowances ; skeletal muscle ; whole foods</subject><ispartof>The American journal of clinical nutrition, 2017-12, Vol.106 (6), p.1375-1383</ispartof><rights>2017 American Society for Nutrition.</rights><rights>Copyright American Society for Clinical Nutrition, Inc. Dec 1, 2017</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c482t-ab4879679baf2ce9a96c332ea925a3ca32a7bbee4305caa56b59dfa4d1def3f73</citedby><cites>FETCH-LOGICAL-c482t-ab4879679baf2ce9a96c332ea925a3ca32a7bbee4305caa56b59dfa4d1def3f73</cites><orcidid>0000-0001-5240-8321 ; 0000-0002-6451-3847 ; 0000-0003-3482-5513 ; 0000-0002-1683-7265 ; 0000-0002-6744-9705 ; 0000-0003-3843-6806 ; 0000-0002-9559-7326 ; 0000-0002-0144-5816</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>315,782,786,27933,27934</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/29092886$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Mitchell, Cameron J</creatorcontrib><creatorcontrib>Milan, Amber M</creatorcontrib><creatorcontrib>Mitchell, Sarah M</creatorcontrib><creatorcontrib>Zeng, Nina</creatorcontrib><creatorcontrib>Ramzan, Farha</creatorcontrib><creatorcontrib>Sharma, Pankaja</creatorcontrib><creatorcontrib>Knowles, Scott O</creatorcontrib><creatorcontrib>Roy, Nicole C</creatorcontrib><creatorcontrib>Sjödin, Anders</creatorcontrib><creatorcontrib>Wagner, Karl-Heinz</creatorcontrib><creatorcontrib>Cameron-Smith, David</creatorcontrib><title>The effects of dietary protein intake on appendicular lean mass and muscle function in elderly men: a 10-wk randomized controlled trial</title><title>The American journal of clinical nutrition</title><addtitle>Am J Clin Nutr</addtitle><description>The Recommended Daily Allowance (RDA) for protein intake in the adult population is widely promoted as 0.8 g · kg−1 · d−1. Aging may increase protein requirements, particularly to maintain muscle mass.
We investigated whether controlled protein consumption at the current RDA or twice the RDA (2RDA) affects skeletal muscle mass and physical function in elderly men.
In this parallel-group randomized trial, 29 men aged >70 y [mean ± SD body mass index (in kg/m2): 28.3 ± 4.2] were provided with a complete diet containing either 0.8 (RDA) or 1.6 (2RDA) g protein · kg−1 · d−1, aimed to balance energy needs. Before treatment and after 10 wk of intervention, whole-body and appendicular lean mass were measured by using dual-energy X-ray absorptiometry. Knee-extension peak power was measured with dynamometry.
Both groups were found to have been in a moderate negative energy balance (mean ± SD RDA: 209 ± 213 kcal/d; 2RDA 145 ± 214 kcal/d; P= 0.427 for difference between the groups). In comparison with RDA, whole-body lean mass increased in 2RDA (P = 0.001; 1.49 ± 1.30 kg, P < 0.001 compared with −0.55 ± 1.49 kg, P = 0.149). This difference was mostly accounted for by an increase in trunk lean mass found in 2RDA (+1.39 ± 1.09 kg, P < 0.001). Appendicular lean mass also decreased in RDA compared with 2RDA (P = 0.022), driven by a reduction in RDA (−0.64 ± 0.91 kg, P = 0.005 compared with 0.11 ± 0.57 kg, P = 0.592). Adjusting for energy imbalances did not alter these findings. Knee-extension peak power was also differently affected (P = 0.012; 26.6 ± 47.7 W, P = 0.015 in 2RDA compared with −11.7 ± 31.0 W, P = 0.180 in RDA).
Consumption of a diet providing 2RDA for protein compared with the current guidelines was found to have beneficial effects on lean body mass and leg power in elderly men. These effects were not explained by differences in energy balance. This trial was registered at the Australia New Zealand Clinical Trial Registry (www.anzctr.org.au) as ACTRN12616000310460.</description><subject>Absorptiometry, Photon</subject><subject>Aged</subject><subject>Aged, 80 and over</subject><subject>Aging - physiology</subject><subject>Body Composition - drug effects</subject><subject>Body Fluid Compartments - drug effects</subject><subject>Body Mass Index</subject><subject>Body size</subject><subject>Consumption</subject><subject>Diet</subject><subject>Dietary intake</subject><subject>dietary protein</subject><subject>Dietary Proteins - administration & dosage</subject><subject>Dietary Proteins - pharmacology</subject><subject>Energy balance</subject><subject>Energy Intake</subject><subject>Energy measurement</subject><subject>Energy Metabolism</subject><subject>Feeding Behavior</subject><subject>Humans</subject><subject>Intervention</subject><subject>Knee</subject><subject>Leg</subject><subject>Male</subject><subject>Men</subject><subject>Muscle Strength - drug effects</subject><subject>Muscle, Skeletal - drug effects</subject><subject>Muscles</subject><subject>nutrient requirements</subject><subject>Nutrition</subject><subject>Nutritional Requirements</subject><subject>older adults</subject><subject>Older people</subject><subject>Organ Size</subject><subject>Proteins</subject><subject>Recommended Dietary Allowances</subject><subject>skeletal muscle</subject><subject>whole foods</subject><issn>0002-9165</issn><issn>1938-3207</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2017</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNp1kT1vFDEQhi0EIpdATYcs0dDsxR_7ZToUAUGKlCbU1qw9Fr547cPeJUr-QP42Pl2gQErlKZ55NX4fQt5xtpWq7c5hZ-KW82HLeyZF94JsuJJjIwUbXpINY0w0ivfdCTktZccYF-3YvyYnQjElxrHfkMebn0jROTRLoclR63GBfE_3OS3oI_VxgVukKVLY7zFab9YAmQaESGcohUK0dF6LCUjdGs3i02GJYrCYwz2dMX6iQDlr7m5prnCa_QNaalJccgqhjkv2EN6QVw5CwbdP7xn58fXLzcVlc3X97fvF56vGtKNYGpjacVD9oCZwwqAC1RspBYISHUgDUsAwTYitZJ0B6PqpU9ZBa7lFJ90gz8jHY2794K8Vy6JnXwyGABHTWjRXnZKiHYauoh_-Q3dpzbFeV6lR8EHUeit1fqRMTqVkdHqf_Vwr1JzpgyN9cKSrI310VDfeP-Wu04z2H_9XSgXUEcBaxG-PWRfjMRq0PldP2ib_bPgfc4yijw</recordid><startdate>201712</startdate><enddate>201712</enddate><creator>Mitchell, Cameron J</creator><creator>Milan, Amber M</creator><creator>Mitchell, Sarah M</creator><creator>Zeng, Nina</creator><creator>Ramzan, Farha</creator><creator>Sharma, Pankaja</creator><creator>Knowles, Scott O</creator><creator>Roy, Nicole C</creator><creator>Sjödin, Anders</creator><creator>Wagner, Karl-Heinz</creator><creator>Cameron-Smith, David</creator><general>Elsevier Inc</general><general>American Society for Clinical Nutrition, Inc</general><scope>6I.</scope><scope>AAFTH</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7QP</scope><scope>7T7</scope><scope>7TS</scope><scope>8FD</scope><scope>C1K</scope><scope>FR3</scope><scope>K9.</scope><scope>NAPCQ</scope><scope>P64</scope><scope>7X8</scope><orcidid>https://orcid.org/0000-0001-5240-8321</orcidid><orcidid>https://orcid.org/0000-0002-6451-3847</orcidid><orcidid>https://orcid.org/0000-0003-3482-5513</orcidid><orcidid>https://orcid.org/0000-0002-1683-7265</orcidid><orcidid>https://orcid.org/0000-0002-6744-9705</orcidid><orcidid>https://orcid.org/0000-0003-3843-6806</orcidid><orcidid>https://orcid.org/0000-0002-9559-7326</orcidid><orcidid>https://orcid.org/0000-0002-0144-5816</orcidid></search><sort><creationdate>201712</creationdate><title>The effects of dietary protein intake on appendicular lean mass and muscle function in elderly men: a 10-wk randomized controlled trial</title><author>Mitchell, Cameron J ; Milan, Amber M ; Mitchell, Sarah M ; Zeng, Nina ; Ramzan, Farha ; Sharma, Pankaja ; Knowles, Scott O ; Roy, Nicole C ; Sjödin, Anders ; Wagner, Karl-Heinz ; Cameron-Smith, David</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c482t-ab4879679baf2ce9a96c332ea925a3ca32a7bbee4305caa56b59dfa4d1def3f73</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2017</creationdate><topic>Absorptiometry, Photon</topic><topic>Aged</topic><topic>Aged, 80 and over</topic><topic>Aging - physiology</topic><topic>Body Composition - drug effects</topic><topic>Body Fluid Compartments - drug effects</topic><topic>Body Mass Index</topic><topic>Body size</topic><topic>Consumption</topic><topic>Diet</topic><topic>Dietary intake</topic><topic>dietary protein</topic><topic>Dietary Proteins - administration & dosage</topic><topic>Dietary Proteins - pharmacology</topic><topic>Energy balance</topic><topic>Energy Intake</topic><topic>Energy measurement</topic><topic>Energy Metabolism</topic><topic>Feeding Behavior</topic><topic>Humans</topic><topic>Intervention</topic><topic>Knee</topic><topic>Leg</topic><topic>Male</topic><topic>Men</topic><topic>Muscle Strength - drug effects</topic><topic>Muscle, Skeletal - drug effects</topic><topic>Muscles</topic><topic>nutrient requirements</topic><topic>Nutrition</topic><topic>Nutritional Requirements</topic><topic>older adults</topic><topic>Older people</topic><topic>Organ Size</topic><topic>Proteins</topic><topic>Recommended Dietary Allowances</topic><topic>skeletal muscle</topic><topic>whole foods</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Mitchell, Cameron J</creatorcontrib><creatorcontrib>Milan, Amber M</creatorcontrib><creatorcontrib>Mitchell, Sarah M</creatorcontrib><creatorcontrib>Zeng, Nina</creatorcontrib><creatorcontrib>Ramzan, Farha</creatorcontrib><creatorcontrib>Sharma, Pankaja</creatorcontrib><creatorcontrib>Knowles, Scott O</creatorcontrib><creatorcontrib>Roy, Nicole C</creatorcontrib><creatorcontrib>Sjödin, Anders</creatorcontrib><creatorcontrib>Wagner, Karl-Heinz</creatorcontrib><creatorcontrib>Cameron-Smith, David</creatorcontrib><collection>ScienceDirect Open Access Titles</collection><collection>Elsevier:ScienceDirect:Open Access</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>Calcium & Calcified Tissue Abstracts</collection><collection>Industrial and Applied Microbiology Abstracts (Microbiology A)</collection><collection>Physical Education Index</collection><collection>Technology Research Database</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Engineering Research Database</collection><collection>ProQuest Health & Medical Complete (Alumni)</collection><collection>Nursing & Allied Health Premium</collection><collection>Biotechnology and BioEngineering Abstracts</collection><collection>MEDLINE - Academic</collection><jtitle>The American journal of clinical nutrition</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Mitchell, Cameron J</au><au>Milan, Amber M</au><au>Mitchell, Sarah M</au><au>Zeng, Nina</au><au>Ramzan, Farha</au><au>Sharma, Pankaja</au><au>Knowles, Scott O</au><au>Roy, Nicole C</au><au>Sjödin, Anders</au><au>Wagner, Karl-Heinz</au><au>Cameron-Smith, David</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The effects of dietary protein intake on appendicular lean mass and muscle function in elderly men: a 10-wk randomized controlled trial</atitle><jtitle>The American journal of clinical nutrition</jtitle><addtitle>Am J Clin Nutr</addtitle><date>2017-12</date><risdate>2017</risdate><volume>106</volume><issue>6</issue><spage>1375</spage><epage>1383</epage><pages>1375-1383</pages><issn>0002-9165</issn><eissn>1938-3207</eissn><abstract>The Recommended Daily Allowance (RDA) for protein intake in the adult population is widely promoted as 0.8 g · kg−1 · d−1. Aging may increase protein requirements, particularly to maintain muscle mass.
We investigated whether controlled protein consumption at the current RDA or twice the RDA (2RDA) affects skeletal muscle mass and physical function in elderly men.
In this parallel-group randomized trial, 29 men aged >70 y [mean ± SD body mass index (in kg/m2): 28.3 ± 4.2] were provided with a complete diet containing either 0.8 (RDA) or 1.6 (2RDA) g protein · kg−1 · d−1, aimed to balance energy needs. Before treatment and after 10 wk of intervention, whole-body and appendicular lean mass were measured by using dual-energy X-ray absorptiometry. Knee-extension peak power was measured with dynamometry.
Both groups were found to have been in a moderate negative energy balance (mean ± SD RDA: 209 ± 213 kcal/d; 2RDA 145 ± 214 kcal/d; P= 0.427 for difference between the groups). In comparison with RDA, whole-body lean mass increased in 2RDA (P = 0.001; 1.49 ± 1.30 kg, P < 0.001 compared with −0.55 ± 1.49 kg, P = 0.149). This difference was mostly accounted for by an increase in trunk lean mass found in 2RDA (+1.39 ± 1.09 kg, P < 0.001). Appendicular lean mass also decreased in RDA compared with 2RDA (P = 0.022), driven by a reduction in RDA (−0.64 ± 0.91 kg, P = 0.005 compared with 0.11 ± 0.57 kg, P = 0.592). Adjusting for energy imbalances did not alter these findings. Knee-extension peak power was also differently affected (P = 0.012; 26.6 ± 47.7 W, P = 0.015 in 2RDA compared with −11.7 ± 31.0 W, P = 0.180 in RDA).
Consumption of a diet providing 2RDA for protein compared with the current guidelines was found to have beneficial effects on lean body mass and leg power in elderly men. These effects were not explained by differences in energy balance. This trial was registered at the Australia New Zealand Clinical Trial Registry (www.anzctr.org.au) as ACTRN12616000310460.</abstract><cop>United States</cop><pub>Elsevier Inc</pub><pmid>29092886</pmid><doi>10.3945/ajcn.117.160325</doi><tpages>9</tpages><orcidid>https://orcid.org/0000-0001-5240-8321</orcidid><orcidid>https://orcid.org/0000-0002-6451-3847</orcidid><orcidid>https://orcid.org/0000-0003-3482-5513</orcidid><orcidid>https://orcid.org/0000-0002-1683-7265</orcidid><orcidid>https://orcid.org/0000-0002-6744-9705</orcidid><orcidid>https://orcid.org/0000-0003-3843-6806</orcidid><orcidid>https://orcid.org/0000-0002-9559-7326</orcidid><orcidid>https://orcid.org/0000-0002-0144-5816</orcidid><oa>free_for_read</oa></addata></record> |
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| subjects | Absorptiometry, Photon Aged Aged, 80 and over Aging - physiology Body Composition - drug effects Body Fluid Compartments - drug effects Body Mass Index Body size Consumption Diet Dietary intake dietary protein Dietary Proteins - administration & dosage Dietary Proteins - pharmacology Energy balance Energy Intake Energy measurement Energy Metabolism Feeding Behavior Humans Intervention Knee Leg Male Men Muscle Strength - drug effects Muscle, Skeletal - drug effects Muscles nutrient requirements Nutrition Nutritional Requirements older adults Older people Organ Size Proteins Recommended Dietary Allowances skeletal muscle whole foods |
| title | The effects of dietary protein intake on appendicular lean mass and muscle function in elderly men: a 10-wk randomized controlled trial |
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