The impact of an acute bout of kettlebell exercise on glucose tolerance in sedentary males
Greenwald, Samantha Leigh
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Purpose: Type 2 diabetes is a chronic condition that has reached epidemic proportions with nearly 24 million Americans having the disease in the year 2007. Kettlebell exercise combines components of aerobic and resistance-type exercise; however, the effects of kettlebell exercise on glucose tolerance and insulin sensitivity have not been investigated. The purpose of this study was to examine whether a single session of kettlebell exercise impacts glucose tolerance and insulin levels in healthy but sedentary individuals. Methods: Seven sedentary but healthy male subjects (~ 24 years old) underwent a two-hour oral glucose tolerance test (75 gm glucose) under two different conditions: 1) control (no exercise), or 2) kettlebell exercise (2 sets of 7 exercises x 15 repetitions/ set interspersed with 30" rest periods; total workout time ~ 24 minutes). An oral glucose tolerance test was performed immediately after the control or kettlebell protocol. Blood glucose and insulin levels were measured before, and 60 and 120 minutes after glucose ingestion. Results: Insulin levels were not significantly different at any time point between control and kettlebell workout. There was no significant difference in blood glucose concentrations at baseline (time 0) and at 120 minutes. However, glucose concentration was significantly lower (p < 0.05) 60 minutes following kettlebell exercise when compared to control. Conclusions: Results indicate that an acute bout of kettlebell exercise can improve glucose clearance in young sedentary men. These results suggest that kettlebell training may provide an inexpensive home-based approach for prevention or management of type 2 diabetes.