Abstract
Background: Emerging research suggests that redistributing total protein intake from 1 high-protein meal/d to multiple moderately high-protein meals improves 24-h muscle protein synthesis. Over time, this may promote positive changes in body composition. Objective: We sought to assess the effects of within-day protein intake distribution on changes in body composition during dietary energy restriction and resistance training. Design: In a randomized parallel-design study, 41 men and women [mean ± SEM age: 35 ± 2 y; body mass index (in kg/m2): 31.5 ± 0.5] consumed an energy-restricted diet (750 kcal/d below the requirement) for 16 wk while performing resistance training 3 d/wk. Subjects consumed 90 g protein/d (1.0 ± 0.03 g · kg-1 · d-1, 125% of the Recommended Dietary Allowance, at intervention week 1) in either a skewed (10 g at breakfast, 20 g at lunch, and 60 g at dinner; n = 20) or even (30 g each at breakfast, lunch, and dinner; n = 21) distribution pattern. Body composition was measured pre- and postintervention. Results: Over time, whole-body mass (least-squares mean ± SE: -7.9 ± 0.6 kg), whole-body lean mass (-1.0 ± 0.2 kg), wholebody fat mass (-6.9 ± 0.5 kg), appendicular lean mass (-0.7 ± 0.1 kg), and appendicular fat mass (-2.6 ± 0.2 kg) each decreased. The midthigh muscle area (0 ± 1 cm2) did not change over time, whereas the midcalf muscle area decreased (-3 ± 1 cm2). Withinday protein distribution did not differentially affect these bodycomposition responses. Conclusion: The effectiveness of dietary energy restriction combined with resistance training to improve body composition is not influenced by the within-day distribution of protein when adequate total protein is consumed. This trial was registered at clinicaltrials. gov as NCT02066948.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1190-1196 |
| Number of pages | 7 |
| Journal | American Journal of Clinical Nutrition |
| Volume | 106 |
| Issue number | 5 |
| DOIs | |
| State | Published - Nov 1 2017 |
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Keywords
- Exercise
- Heart health
- Muscle mass
- Protein patterning
- Weight loss
ASJC Scopus subject areas
- Medicine (miscellaneous)
- Nutrition and Dietetics
Cite this
Within-day protein distribution does not influence body composition responses during weight loss in resistance-training adults who are overweight. / Hudson, Joshua L.; Kim, Jung Eun; Paddon-Jones, Douglas; Campbell, Wayne W.
In: American Journal of Clinical Nutrition, Vol. 106, No. 5, 01.11.2017, p. 1190-1196.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Within-day protein distribution does not influence body composition responses during weight loss in resistance-training adults who are overweight
AU - Hudson, Joshua L.
AU - Kim, Jung Eun
AU - Paddon-Jones, Douglas
AU - Campbell, Wayne W.
PY - 2017/11/1
Y1 - 2017/11/1
N2 - Background: Emerging research suggests that redistributing total protein intake from 1 high-protein meal/d to multiple moderately high-protein meals improves 24-h muscle protein synthesis. Over time, this may promote positive changes in body composition. Objective: We sought to assess the effects of within-day protein intake distribution on changes in body composition during dietary energy restriction and resistance training. Design: In a randomized parallel-design study, 41 men and women [mean ± SEM age: 35 ± 2 y; body mass index (in kg/m2): 31.5 ± 0.5] consumed an energy-restricted diet (750 kcal/d below the requirement) for 16 wk while performing resistance training 3 d/wk. Subjects consumed 90 g protein/d (1.0 ± 0.03 g · kg-1 · d-1, 125% of the Recommended Dietary Allowance, at intervention week 1) in either a skewed (10 g at breakfast, 20 g at lunch, and 60 g at dinner; n = 20) or even (30 g each at breakfast, lunch, and dinner; n = 21) distribution pattern. Body composition was measured pre- and postintervention. Results: Over time, whole-body mass (least-squares mean ± SE: -7.9 ± 0.6 kg), whole-body lean mass (-1.0 ± 0.2 kg), wholebody fat mass (-6.9 ± 0.5 kg), appendicular lean mass (-0.7 ± 0.1 kg), and appendicular fat mass (-2.6 ± 0.2 kg) each decreased. The midthigh muscle area (0 ± 1 cm2) did not change over time, whereas the midcalf muscle area decreased (-3 ± 1 cm2). Withinday protein distribution did not differentially affect these bodycomposition responses. Conclusion: The effectiveness of dietary energy restriction combined with resistance training to improve body composition is not influenced by the within-day distribution of protein when adequate total protein is consumed. This trial was registered at clinicaltrials. gov as NCT02066948.
AB - Background: Emerging research suggests that redistributing total protein intake from 1 high-protein meal/d to multiple moderately high-protein meals improves 24-h muscle protein synthesis. Over time, this may promote positive changes in body composition. Objective: We sought to assess the effects of within-day protein intake distribution on changes in body composition during dietary energy restriction and resistance training. Design: In a randomized parallel-design study, 41 men and women [mean ± SEM age: 35 ± 2 y; body mass index (in kg/m2): 31.5 ± 0.5] consumed an energy-restricted diet (750 kcal/d below the requirement) for 16 wk while performing resistance training 3 d/wk. Subjects consumed 90 g protein/d (1.0 ± 0.03 g · kg-1 · d-1, 125% of the Recommended Dietary Allowance, at intervention week 1) in either a skewed (10 g at breakfast, 20 g at lunch, and 60 g at dinner; n = 20) or even (30 g each at breakfast, lunch, and dinner; n = 21) distribution pattern. Body composition was measured pre- and postintervention. Results: Over time, whole-body mass (least-squares mean ± SE: -7.9 ± 0.6 kg), whole-body lean mass (-1.0 ± 0.2 kg), wholebody fat mass (-6.9 ± 0.5 kg), appendicular lean mass (-0.7 ± 0.1 kg), and appendicular fat mass (-2.6 ± 0.2 kg) each decreased. The midthigh muscle area (0 ± 1 cm2) did not change over time, whereas the midcalf muscle area decreased (-3 ± 1 cm2). Withinday protein distribution did not differentially affect these bodycomposition responses. Conclusion: The effectiveness of dietary energy restriction combined with resistance training to improve body composition is not influenced by the within-day distribution of protein when adequate total protein is consumed. This trial was registered at clinicaltrials. gov as NCT02066948.
KW - Exercise
KW - Heart health
KW - Muscle mass
KW - Protein patterning
KW - Weight loss
UR - http://www.scopus.com/inward/record.url?scp=85033213479&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85033213479&partnerID=8YFLogxK
U2 - 10.3945/ajcn.117.158246
DO - 10.3945/ajcn.117.158246
M3 - Article
VL - 106
SP - 1190
EP - 1196
JO - American Journal of Clinical Nutrition
JF - American Journal of Clinical Nutrition
SN - 0002-9165
IS - 5
ER -