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B-41 Thematic Poster - Macronutrient Metabolism in Athletes Wednesday, May 31, 2017, 3: 15 PM - 5: 15 PM Room: 304

Glucose Regulation Following A Short And Long Bout Of High-intensity Functional Training

743 Board #5 May 31 3

15 PM - 5

15 PM

Kliszczewicz, Brian; Buresh, Robert; Bechke, Emily; Williamson, Cassie; Bailey, Paul; Feito, Yuri FACSM

Author Information
Medicine & Science in Sports & Exercise: May 2017 - Volume 49 - Issue 5S - p 189
doi: 10.1249/01.mss.0000517353.75356.b0
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Glucose regulation is a fundamental process of metabolic function, and is acutely altered by physical activity. Importantly, exercise intensity and duration have been shown to affect glucose regulation differently. High-Intensity Functional Training (HIFT) is a form of exercise performed using combinations of various modalities and durations. Though HIFT is of a high-intensity nature, it is unknown if different durations of HIFT will influence glucose regulation differently.

PURPOSE: To determine the effect of a Short (<5 min) and Long (15 min) bout of HIFT on plasma glucose and insulin concentration.

METHODS: Ten apparently healthy males (28.11 ± 5.09 yrs) participated in this study. Two HIFT sessions (SHORT and LONG) were performed in a crossover fashion. The SHORT bout consisted of 30 power clean-and-jerk lifts (61 kg) for time, while the LONG bout was a 15-min circuit of 250 m row, 20 kettle bell swings (24 kg), and 15 dumbbell (16 kg) squat presses performed for 15 min. Blood plasma was collected at four different times points: PRE, POST, 1HR, and 3HR in order to examine glucose (GLU) and insulin (INS) responses.

RESULTS: A repeated measures ANOVA showed no trial dependent difference between the SHORT and LONG bouts of HIFT in GLU (p = 0.109) or INS (p = 0.504). A time effect was observed in both bouts only at the POST time point for both GLU; Short: 83.9 ± 16 mg/dL vs. 110.3 ± 18 mg/dL (p < 0.001), Long: 84.5 ± 11 mg/dL vs. 124.6 ± 19 mg/dL and INS; Short: 7.9 ± 4 mU/L vs. 16.1 ± 7 mU/L, Long: 9.1 ± 7.8 mU/L vs. 13.7 ± 7.3 mU/L (p < 0.05).

CONCLUSIONS: This study demonstrated that the SHORT and LONG bouts of HIFT elicited similar glucose and insulin responses. Duration of the HIFT bouts may not be a determining factor in glucose regulation in healthy individuals. Further research is necessary to better understand the relationship of varying durations of HIFT on glucose regulation.

© 2017 American College of Sports Medicine