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Influence of Nutrient Timing Following Resistance Exercise on Sleep RQ and Glucose in Young Men with a Family History of Type 2 Diabetes
Author(s) -
Stevens Michelle,
Gutierrez Jean,
Gribok Andrei,
Rumpler William,
Tadros Maryann,
DiPietro Loretta
Publication year - 2011
Publication title -
the faseb journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.709
H-Index - 277
eISSN - 1530-6860
pISSN - 0892-6638
DOI - 10.1096/fasebj.25.1_supplement.lb198
Subject(s) - respiratory quotient , medicine , sleep (system call) , insulin resistance , carbohydrate metabolism , type 2 diabetes , zoology , nutrient , endocrinology , diabetes mellitus , chemistry , biology , organic chemistry , computer science , operating system
Objective To examine the impact of post‐resistance exercise supplement timing on sleep glucose and respiratory quotient (RQ; indicator of metabolic flexibility and lipid metabolism). Methods Young male participants (n=6) underwent two 48‐h stays in a whole‐room calorimeter. The first 24‐h served as a control day, and on the second day participants completed a 40‐min novel resistance exercise protocol and consumed 600g of 1% chocolate milk either immediately after (IPEN) or 3‐h after completing resistance exercise (3h‐PEN). RQ was measured continuously throughout the 48‐h period and glucose concentrations were determined by a continuous glucose monitoring system. Results Sleep RQ following the exercise day, as compared to the control day, was significantly lower following IPEN (0.71±0.04 vs. 0.75±0.02; p= 0.04), but was not different in 3h‐PEN (0.72±0.03 vs. 0.72±0.03 p= 0.71). Glucose during the same sleep period following the exercise day, as compared to the control day, was not significantly different following IPEN (99±15 vs. 98±9 mg·dL −1 ; p= 0.77) or 3h‐PEN (92±10 vs. 92±12mg·dL −1 ; p= 0.96). Conclusions Preliminary results indicate IPEN may have promoted greater fat metabolism during sleep, as compared to 3h‐PEN, but blood glucose concentration was not affected by nutrient timing. This study was funded by the GWU Department of Exercise Science.