Exercise interval training: an improved stimulus for improving the physiology of pre-diabetes

Medical Hypotheses
Conrad P Earnest

Abstract

Current reports estimate that type II diabetes (T2D) affects 5-8% of adults. Also recognized is a transitional group of patients whose fasting blood glucose is abnormal; yet, not considered high enough to be diagnosed as diabetes. Defined as "pre-diabetes" these individuals have impaired fasting glucose (IFG; fasting glucose 100-125 mg/dL), impaired glucose tolerance (IGT; 2 h glucose 140-199 mg/dL) or both. Two unifying features associated with IFG and IGT are their strong links to obesity and physical inactivity, which lead independently and collectively toward the erosion of various cellular processes affecting glucose control. In contrast, regular exercise positively influences IFG/IGT and obesity, thus representing an important therapy for preventing diabetes via the enhancement of several mechanisms of action. These include improved glucose metabolism, muscle respiratory capacity, mitochondrial respiratory chain activity and beta-oxidation. Contemporary exercise guidelines provided by various organizations recommend that exercise be performed at intensities ranging from 40% to 85% of maximal aerobic capacity. Unfortunately, little is known regarding the optimal intensity to best facilitate the physiological benefits assoc...Continue Reading

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