Article Title



Summer G. Simulcik1, Naomi Hemphill2, Sophie Bollinger2, Stephanie P. Kurti2, Michael J. Saunders2, Elizabeth S. Edwards, FACSM2. 1Virginia Commonwealth University, Richmond, VA. 2James Madison University, Harrisonburg, VA.

BACKGROUND: Many adults experience chronic hyperlipemia and hyperglycemia due to postprandial responses following the regular consumption of high fat meals. Recently, the summation of postprandial triglyceride (PPTG) and postprandial glucose (PPG) responses, termed the metabolic load index (MLI), has been proposed as a way to quantify the combined metabolic impact of these responses. The ability of resistance exercise (RE) to attenuate these responses requires further study, and postprandial responses in those older than 50 y are particularly understudied. In addition, there remain questions regarding the optimal timing of exercise to mitigate PPTG and PPG responses. Therefore, this study examined the effects of an acute bout of moderate RE performed before and after a high fat meal (HFM) on MLI, PPTG, PPG in adults > 50 y. METHODS: Eleven adults (50-80 y) completed three experimental trials, in randomly counterbalanced order: an HFM with no exercise (HMF), exercise directly before HFM consumption (HFM+ EX BEF), and exercise directly after HFM consumption (HFM + EX AFT). RE was a true-to-life bout consisting of 14 exercises with a resistance band, designed to keep RPE at or below 14. Fasting and postprandial (minute 30, 60, 90, 120, 180, 240) lipid and glucose samples were obtained. Changes in dependent measures over time and between-conditions were assessed using repeated measures ANOVAs (time*condition), with an alpha value of p < 0.05. RESULTS: There was a significant time x condition interaction (p < 0.05) in MLI response, however no significant interaction was seen for PPTG or PPG individually. No differences in MLI were observed between groups at any individual time points. The HFM alone group exhibited a higher change in MLI from baseline to minute 240 when compared to the EX AFT group. CONCLUSION: A moderate bout of resistance band exercise appears to have a small, measurable effect on MLI. This provides evidence that true-to-life bouts of resistance exercise may be useful in improving the overall metabolic responses following an HFM.

This document is currently not available here.