TY - JOUR
T1 - Mung bean protein supplement improves muscular strength in healthy, underactive vegetarian adults
AU - Bartholomae, Eric
AU - Incollingo, April
AU - Vizcaino, Maricarmen
AU - Wharton, Christopher
AU - Johnston, Carol S.
N1 - Funding Information:
Funding: This research was funded in part by the Rob and Melani Walton Sustainability Solutions Initiatives at Arizona State University and an Arizona State University Graduate and Professional Student Association research grant. Mung bean protein product was donated by JUST, Inc.
Funding Information:
This research was funded in part by the Rob and Melani Walton Sustainability Solutions Initiatives at Arizona State University and an Arizona State University Graduate and Professional Student Association research grant. Mung bean protein product was donated by JUST, Inc. The authors thank Andrew Berardy post-doctoral associate with the Swette Center for Sustainable Food Systems, and Ginger Hook, Veronica Zamora, Michelle Hadeed and Emily Pirazanova for excellent technical assistance and diet analysis.
Publisher Copyright:
© 2019 by the authors. Licensee MDPI, Basel, Switzerland.
PY - 2019/10
Y1 - 2019/10
N2 - Although vegetarian diets are considered generally protective against chronic disease, nutrient deficiencies, including protein, are possible due to low bioavailability from plant-based sources. The consequences of inadequate dietary protein include reduced lean body mass (LBM) and muscle weakness. This study examined relationships between protein intake, strength, and LBM in 37 underactive vegetarians and recorded the impact of protein supplementation (18 g/day mung bean protein) on these indices utilizing an eight-week, randomized, controlled, feeding trial. Both handgrip and knee flexor and extensor strength were measured at baseline and week eight. At baseline, LBM was significantly related to grams of protein consumed daily. LBM was also correlated to grip strength (r = 0.569, p < 0.001) and lower body strength (r = 0.763 to 0.784; p < 0.001). Twenty-five vegetarians completed the feeding trial, including 11 in the protein supplementation group (PRO) and 14 in the control group (CON). At the end of the trial, LBM and strength did not differ significantly between groups. However, the average percent change for grip, flexor, and extensor strength did differ between PRO and CON participants (+2.9 ± 7.2% and −2.6 ± 7.3% respectively, p = 0.05). Thus, there were strong associations between dietary protein, LBM, and strength in vegetarians and an indication that supplementary vegetarian protein increased strength in the absence of exercise and independent of LBM.
AB - Although vegetarian diets are considered generally protective against chronic disease, nutrient deficiencies, including protein, are possible due to low bioavailability from plant-based sources. The consequences of inadequate dietary protein include reduced lean body mass (LBM) and muscle weakness. This study examined relationships between protein intake, strength, and LBM in 37 underactive vegetarians and recorded the impact of protein supplementation (18 g/day mung bean protein) on these indices utilizing an eight-week, randomized, controlled, feeding trial. Both handgrip and knee flexor and extensor strength were measured at baseline and week eight. At baseline, LBM was significantly related to grams of protein consumed daily. LBM was also correlated to grip strength (r = 0.569, p < 0.001) and lower body strength (r = 0.763 to 0.784; p < 0.001). Twenty-five vegetarians completed the feeding trial, including 11 in the protein supplementation group (PRO) and 14 in the control group (CON). At the end of the trial, LBM and strength did not differ significantly between groups. However, the average percent change for grip, flexor, and extensor strength did differ between PRO and CON participants (+2.9 ± 7.2% and −2.6 ± 7.3% respectively, p = 0.05). Thus, there were strong associations between dietary protein, LBM, and strength in vegetarians and an indication that supplementary vegetarian protein increased strength in the absence of exercise and independent of LBM.
KW - Lean body mass
KW - Mung bean protein
KW - Muscular strength
KW - Vegan
KW - Vegetarian
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U2 - 10.3390/nu11102423
DO - 10.3390/nu11102423
M3 - Article
C2 - 31614532
AN - SCOPUS:85073415418
SN - 2072-6643
VL - 11
JO - Nutrients
JF - Nutrients
IS - 10
M1 - 2423
ER -