van der Heijden, I, Monteyne, AJ, West, S, Morton, JP, Langan-Evans, C, Hearris, MA, Abdelrahman, DR, Murton, AJ, Stephens, FB and Wall, BT Plant Protein Blend Ingestion Stimulates Post-Exercise Myofibrillar Protein Synthesis Rates Equivalently to Whey in Resistance-Trained Adults. Medicine & Science in Sports & Exercise. ISSN 0195-9131 (Accepted)

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Abstract

Purpose Whey protein ingestion is typically considered an optimal dietary strategy to maximize myofibrillar protein synthesis (MyoPS) following resistance exercise. While single source plant protein ingestion is typically less effective, at least partly, due to less favorable amino acid profiles, this could theoretically be overcome by blending plant-based proteins with complementary amino acid profiles. We compared the post-exercise MyoPS response following the ingestion of a novel plant-derived protein blend with an isonitrogenous bolus of whey protein. Methods Ten healthy, resistance trained, young adults (male/female: 8/2; age: 26 ± 6 y; BMI: 24 ± 3 kg·m-2) received a primed continuous infusion of L-[ring-2H5]-phenylalanine and completed a bout of bilateral leg resistance exercise before ingesting 32 g protein from whey (WHEY) or a plant protein blend (BLEND; 39.5% pea, 39.5% brown rice, 21.0% canola) in a randomized, double-blind crossover fashion. Blood and muscle samples were collected at rest, and 2 and 4 h after exercise and protein ingestion, to assess plasma amino acid concentrations, and postabsorptive and post-exercise MyoPS rates. Results Plasma essential amino acid availability over the 4 h postprandial post-exercise period was ~44% higher in WHEY compared with BLEND (P = 0.04). From equivalent postabsorptive values (WHEY, 0.042 ± 0.020%·h−1; BLEND, 0.043 ± 0.015%·h−1) MyoPS rates increased following exercise and protein ingestion (time effect; P < 0.001) over a 0-2 h (WHEY, 0.085 ± 0.037%·h−1; BLEND, 0.080 ± 0.037%·h−1) and 2-4 h (WHEY, 0.085 ± 0.036%·h−1; BLEND, 0.086 ± 0.034%·h−1) period, with no differences between conditions during either period or throughout the entire (0-4 h) postprandial period (time × condition interactions; all P > 0.05). Conclusions Ingestion of a novel plant-based protein blend stimulates post-exercise MyoPS to an equivalent extent as a whey protein, demonstrating the utility of plant protein blends to optimize post-exercise skeletal muscle reconditioning.

Item Type:	Article
Uncontrolled Keywords:	1106 Human Movement and Sports Sciences; 1116 Medical Physiology; 1117 Public Health and Health Services; Sport Sciences
Subjects:	T Technology > TX Home economics > TX341 Nutrition. Foods and food supply R Medicine > RC Internal medicine > RC1200 Sports Medicine
Divisions:	Sport & Exercise Sciences
Publisher:	Wolters Kluwer Health, Inc on behalf of American College of Sports Medicine
SWORD Depositor:	A Symplectic
Date Deposited:	08 Apr 2024 14:40
Last Modified:	08 Apr 2024 14:45
DOI or ID number:	10.1249/mss.0000000000003432
URI:	https://researchonline.ljmu.ac.uk/id/eprint/22978

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