Document Type
Article
Publication Date
4-27-2020
Keywords
muscle protein synthesis, potato protein, resistance exercise
Abstract
Skeletal muscle myofibrillar protein synthesis (MPS) increases in response to protein feeding and to resistance exercise (RE), where each stimuli acts synergistically when combined. The efficacy of plant proteins such as potato protein (PP) isolate to stimulate MPS is unknown. We aimed to determine the effects of PP ingestion on daily MPS with and without RE in healthy women. In a single blind, parallel-group design, 24 young women (21 ± 3 years, n = 12/group) consumed a weight-maintaining baseline diet containing 0.8 g/kg/d of protein before being randomized to consume either 25 g of PP twice daily (1.6 g/kg/d total protein) or a control diet (CON) (0.8 g/kg/d total protein) for 2 wks. Unilateral RE (~30% of maximal strength to failure) was performed thrice weekly with the opposite limb serving as a non-exercised control (Rest). MPS was measured by deuterated water ingestion at baseline, following supplementation (Rest), and following supplementation + RE (Exercise). Ingestion of PP stimulated MPS by 0.14 ± 0.09 %/d at Rest, and by 0.32 ± 0.14 %/d in the Exercise limb. MPS was significantly elevated by 0.20 ± 0.11 %/d in the Exercise limb in CON (p = 0.008). Consuming PP to increase protein intake to levels twice the recommended dietary allowance for protein augmented rates of MPS. Performance of RE stimulated MPS regardless of protein intake. PP is a high-quality, plant-based protein supplement that augments MPS at rest and following RE in healthy young women.
Faculty
Faculty of Applied Health & Community Studies (FAHCS)
Journal
Nutrients
Volume
12
Issue
5
Version
Publisher's version
Peer Reviewed/Refereed Publication
yes
Terms of Use
Terms of Use for Works posted in SOURCE.
Creative Commons License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
Original Publication Citation
Oikawa, S. Y., Bahniwal, R., Holloway, T. M., Lim, C., McLeod, J. C., McGlory, C., Baker, S.K, Phillips, S. M. (2020). Potato protein isolate stimulates muscle protein synthesis at rest and with resistance exercise in young women. Nutrients, 12(5), 1235. doi:10.3390/nu12051235
SOURCE Citation
Oikawa, Sara Y.; Bahniwal, Ravninder; Holloway, Tanya M.; Lim, Dr. Changhyun; McLeod, Jonathan C.; McGlory, Chris; Baker, Steven K.; and Phillips, Stuart, "Potato Protein Isolate Stimulates Muscle Protein Synthesis at Rest and with Resistance Exercise in Young Women" (2020). Publications and Scholarship. 14.
https://source.sheridancollege.ca/fahcs_publications/14