Sprint to Lose

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With its low cost and accessibility, running is often the exercise modality of choice. Those looking to drop pounds and gain improved metabolic function may want to pick up the pace. A study published online January 28 in BMC Endocrine Disorders (2009; 9 [3]) provides promising evidence in favor of extremely short duration high-intensity interval training (HIT) as a method for improving insulin action. Study participants included 25 “young, healthy sedentary or recreationally active men” who were placed in an HIT group or participated in a “separate experiment to determine intra-individual variation in response to an oral glucose tolerance test, and did not perform HIT.” The HIT group performed four to six 30-second sprints at maximum effort with a 4-minute rest between exercises six times over 14 days. This accounted for a time commitment of 17–26 minutes and only 2–3 minutes of sprinting per session. By the end of the short study, the HIT group had improved insulin sensitivity by 23%.

“The efficacy of a high-intensity exercise protocol, involving only ~250 kcal of work each week, to substantially improve insulin action in young sedentary [adults] is remarkable,” stated the authors. “This novel time-efficient training paradigm can be used as a strategy to reduce metabolic risk factors in young and middle-aged sedentary populations who otherwise would not adhere to time-consuming traditional aerobic regimes.”

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Ryan Halvorson

IDEA Author/Presenter
Ryan Halvorson is the publications assistant for IDEA Health & Fitness Association. He is a speaker ... more less
May 2009

© 2009 by IDEA Health & Fitness Inc. All rights reserved. Reproduction without permission is strictly prohibited.

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Article Comments

Marc Ciminelli
On Oct 14, 2009
Interesting results, but here is my question:
What if I have a diabetic person doing this type of training? Will I not increase this person's glycemia considering that he intensity is very high and this can lead to the liver increasing its output of glucose?

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