A Comparison Of The Effects Of An Acute Bout Of Low- And High-Volume Resistance Exercise On Insulin And Glucose Responses After An Oral Glucose Challenge In Premenopausal, Normoglycemic Women.

Overview

The purpose of the study was to compare an acute bout of low-volume and high-volume resistance exercise (RE) on insulin sensitivity and oral glucose tolerance test (OGTT) glucose, insulin, C-peptide responses in premenopausal, normoglycemic, untrained women. Ten women (age 30.1 +/- 9.0 yr) were assessed for body composition, maximal oxygen uptake, and 1RM for six resistance exercises prior to completing the three following treatments administered in random order: one set of ten resistance exercises (RE1), three ...
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Overview

The purpose of the study was to compare an acute bout of low-volume and high-volume resistance exercise (RE) on insulin sensitivity and oral glucose tolerance test (OGTT) glucose, insulin, C-peptide responses in premenopausal, normoglycemic, untrained women. Ten women (age 30.1 +/- 9.0 yr) were assessed for body composition, maximal oxygen uptake, and 1RM for six resistance exercises prior to completing the three following treatments administered in random order: one set of ten resistance exercises (RE1), three sets of 10 resistance exercises (RE3), and no exercise (C). The RE load was 65-70% of the participant's 1RM and was performed for 10 repetitions for both RE bouts. Twenty-four hours after completing each treatment, a 75-gram OGTT was performed following a 12-14 hr overnight fast. Each treatment was administered approximately 26 to 32 days apart and timed to occur during the participant's follicular phase of the menstrual cycle. Compared to C (960.8 mmol/L +/- 152), both RE1 (900.5 mmol/L +/- 113.5, p = .019) and RE3 (827.9.5 mmol/L +/- 116.33, p = .003) glucose AUC responses to an OGTT were significantly reduced the by 6.2 and 13.8% respectively. However, the differences between RE1 and RE3 glucose AUC were not significant. The insulin and C-peptide AUC responses after RE1 and RE3 were not significantly different than C treatment. Insulin sensitivity, as predicted by the Cederholm Insulin Sensitivity Index, was significantly improved after RE1 and RE3 by 10.5 and 25.8%, respectively, but RE1 and RE3 were not significantly different from each other. Changes in glucose AUC from C to both RE1 (r = .731, p = .016) and RE3 (r = .649, p = .042) were significantly correlated to the C treatment glucose AUC. A dose-response relationship between RE volume and changes in glucose, insulin, C-peptide responses or insulin sensitivity were not established from this study. Improvements in glucose AUC and insulin sensitivity were most likely due to increases in GLUT 4 translocation resulting from the activation of non-insulin-dependent signaling pathways. The results of this study suggest that either low- or high-volume resistance exercise can improve insulin sensitivity and reduce plasma glucose levels.
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Product Details

  • ISBN-13: 9781243987266
  • Publisher: BiblioLabsII
  • Publication date: 9/10/2011
  • Pages: 240
  • Product dimensions: 7.44 (w) x 9.69 (h) x 0.51 (d)

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