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D-62 Free Communication/Poster - Protein Metabolism Thursday, May 30, 2019, 1: 00 PM - 6: 00 PM Room: CC-Hall WA2

Correlation Between Dietary Protein Intake And Grip Strength In Inactive Vegetarian And Vegan Females

2019 Board #175 May 30 2:00 PM - 3:30 PM

Bartholomae, Eric; Incollingo, April; Vizcaino, Maricarmen; Wharton, Christopher; Johnston, Carol

Author Information
Medicine & Science in Sports & Exercise: June 2019 - Volume 51 - Issue 6S - p 545
doi: 10.1249/01.mss.0000562137.73001.20
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More than 5% of U.S. adults 18-35 y self-identify as vegetarian or vegan. While health benefits, including reduced risk for cardiometabolic diseases are promoted, concern remains over the potential of lower protein intake, which can lead to reduced muscle mass and strength.

PURPOSE: To examine the relationship between dietary protein and grip strength in inactive vegetarian and vegan female adults.

METHODS: Thirty-three self-reported inactive (<150min exercise/wk) female vegetarians and vegans (31y±9.6; n=23 vegan) of at least 1 year were recruited for this study. A 24hr dietary recall was administered by a trained researcher and protein intake calculated using Food Processor software. Dominant handgrip strength was measured 3 times using a handheld dynamometer, and greatest score recorded. An a priori α of 0.05 was used and partial Pearson Product Moment correlation was determined between protein intake and grip strength when controlling for diet type (vegetarian vs. vegan). Independent samples t-tests were conducted to compare protein intake and grip strength in vegetarians vs. vegans.

RESULTS: Results showed significantly greater grip strength in vegans (26.7±4.7 kg) as compared to vegetarians (23.5±2.9 kg), t(2.046) p<.050, and no difference in protein intake between groups t(-.368) p=.716. Results show no correlation between protein intake (43.7±15.2 g PRO/d) and grip strength (25.7±4.4 kg) while controlling for diet type (r(30)=.118, n=33, p=.520). It is noteworthy that mean grip strength in the sample was significantly below the reference value for North American females (31 kg).

CONCLUSION: This study provides evidence that there was no significant association between protein intake and grip strength in inactive female vegetarians; yet, the grip strength for this population fell significantly below region/gender-specific reference ranges.

Copyright © 2019 by the American College of Sports Medicine