The Acute Effects of Greek Yogurt Consumption on Circulating Bone Metabolic Markers Following High-Intensity Cycling in Premenopausal Females with Overweight and Obesity

Abstract

This thesis compared the bone turnover and metabolism responses of post-exercise Greek yogurt (GY) consumption and an isoenergetic carbohydrate pudding (CP) following high-intensity interval cycling (HIIC) in young- to middle-aged inactive premenopausal females with overweight and obesity. We hypothesized that GY would attenuate post-exercise bone resorption and/or amplify formation compared to CP. Using a randomized crossover design, participants completed an acute HIIC bout followed by the consumption of either GY or CP. Blood samples were collected at pre-exercise, post-exercise, 1hr and 3hr postprandially, and 24hr post-exercise. Bone turnover and metabolism markers RANKL, OPG, PTH, OPN, CTX, SOST, OC, and IGF-1 were measured from serum. Interactions were observed whereby OPG and OC were higher at 1hr and 3hr postprandially, respectively, and PTH was lower throughout the postprandial period in GY versus CP. Thus, GY consumption favourably modulated the acute post-exercise bone turnover and metabolism response in these females.