Effects of protein supplementation combined with resistance exercise on body composition and physical function in older adults: a systematic review and meta-analysis.

Chun-De Liao; Jau-Yih Tsauo; Yen-Tzu Wu; Chin-Pao Cheng; Hui-Chuen Chen; Yi-Ching Huang; Hung-Chou Chen; Tsan-Hon Liou

The American journal of clinical nutrition, 2017

Metadata only. The abstract is not shown here; read it at the publisher or on PubMed.

Abstract

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Where this study is used

Protein supplementation in older adults: Lower-body strength (Older adults with resistance training) — Moderate. Counted in the grade.

Extracted values

AI-assisted extraction: each number comes with the sentence it was read from.

Studies pooled: 17

Study-level values with their source sentences
Field	Value	Source sentence
Review question	This study was conducted to identify the effects of PS on the body composition and physical function of older people undergoing RET.	Show quote for Review question This study was conducted to identify the effects of PS on the body composition and physical function of older people undergoing RET. Located at `abs:0/s:2`
Population	older people undergoing RET	Show quote for Population older people undergoing RET Located at `abs:0/s:2`
Intervention · Agent	protein supplementation	Show quote for Intervention · Agent protein supplementation (PS) Located at `abs:0/s:1`
Comparator	RET alone	Show quote for Comparator than with RET alone Located at `abs:0/s:3`
N studies

lean mass

SMD 0.58 (95% CI 0.32 to 0.84)

Values extracted for lean mass
Field	Value	Source sentence
Outcome name	lean mass	Show quote for Outcome name substantially greater lean mass and leg strength gains Located at `abs:0/s:3`
Effect measure	SMD	Show quote for Effect measure standard mean differences (SMDs) being 0.58 (95% CI: 0.32, 0.84) Located at `abs:0/s:3`
Effect measure as written	standard mean differences (SMDs)	Show quote for Effect measure as written standard mean differences (SMDs) Located at `abs:0/s:3`
Point estimate	0.58	Show quote for Point estimate being 0.58 (95% CI: 0.32, 0.84) Located at `abs:0/s:3`

leg strength

SMD 0.69 (95% CI 0.39 to 0.98)

Values extracted for leg strength
Field	Value	Source sentence
Outcome name	leg strength	Show quote for Outcome name substantially greater lean mass and leg strength gains Located at `abs:0/s:3`
Effect measure	SMD	Show quote for Effect measure standard mean differences (SMDs) being 0.58 (95% CI: 0.32, 0.84) Located at `abs:0/s:3`
Effect measure as written	standard mean differences (SMDs)	Show quote for Effect measure as written standard mean differences (SMDs) Located at `abs:0/s:3`
Point estimate	0.69	Show quote for Point estimate and 0.69 (95% CI: 0.39, 0.98) Located at `abs:0/s:3`

lean mass · studies with a mean BMI ≥30

SMD 0.53 (95% CI 0.19 to 0.87)

Values extracted for lean mass · studies with a mean BMI ≥30
Field	Value	Source sentence
Outcome name	lean mass	Show quote for Outcome name exhibited substantially greater lean mass (SMD: 0.53; 95% CI: 0.19, 0.87) Located at `abs:0/s:4`
Effect measure	SMD	Show quote for Effect measure (SMD: 0.53; 95% CI: 0.19, 0.87) Located at `abs:0/s:4`
Effect measure as written	SMD	Show quote for Effect measure as written (SMD: 0.53; 95% CI: 0.19, 0.87) Located at `abs:0/s:4`
Point estimate	0.53	Show quote for Point estimate (SMD: 0.53; 95% CI: 0.19, 0.87) Located at `abs:0/s:4`

leg strength · studies with a mean BMI ≥30

SMD 0.88 (95% CI 0.42 to 1.34)

Values extracted for leg strength · studies with a mean BMI ≥30
Field	Value	Source sentence
Outcome name	leg strength	Show quote for Outcome name and leg strength (SMD: 0.88; 95% CI: 0.42, 1.34) Located at `abs:0/s:4`
Effect measure	SMD	Show quote for Effect measure (SMD: 0.88; 95% CI: 0.42, 1.34) Located at `abs:0/s:4`
Effect measure as written	SMD	Show quote for Effect measure as written (SMD: 0.88; 95% CI: 0.42, 1.34) Located at `abs:0/s:4`
Point estimate	0.88	Show quote for Point estimate (SMD: 0.88; 95% CI: 0.42, 1.34) Located at `abs:0/s:4`

How these values were extracted

Model claude-haiku-5-5+claude-sonnet-5-5, run on 26 Oct 2026. 2 passes, 86% agreement between passes. 0 fields checked by a person.