title: The effects of two bouts of high- and low-volume resistance exercise on glucose tolerance in normoglycemic women.
abstract: The purpose of the study was to determine the efficacy of a low-volume, moderate-intensity bout of resistance exercise (RE) on glucose, insulin, and C-peptide responses during an oral glucose tolerance test (OGTT) in untrained women compared with a bout of high-volume RE of the same intensity. Ten women (age 30.1 ± 9.0 years) were assessed for body composition, maximal oxygen uptake, and 1-repetition maximum (1RM) before completing 3 treatments administered in random order: 1 set of 10 REs (RE1), 3 sets of 10 REs (RE3), and no exercise (C). Twenty-four hours after completing each treatment, an OGTT was performed after an overnight fast. Glucose area under the curve response to an OGTT was reduced after both RE1 (900 ± 113 mmol·L(-1)·min(-1), p = 0.056) and RE3 (827.9 ± 116.3, p = 0.01) compared with C (960.8 ± 152.7 mmol·L(-1)·min(-1)). Additionally, fasting glucose was significantly reduced after RE3 (4.48 ± 0.45 vs. 4.90 ± 0.44 mmol·L(-1), p = 0.01). Insulin sensitivity (IS), as determined from the Cederholm IS index, was improved after RE1 (10.8%) and after RE3 (26.1%). The reductions in insulin and C-peptide areas after RE1 and RE3 were not significantly different from those in the C treatment. In conclusion, greater benefits in glucose regulation appear to occur after higher volumes of RE. However, observed reductions in glucose, insulin, C-peptide areas after RE1 suggest that individuals who may not well tolerate high-volume RE protocols may still benefit from low-volume RE at moderate intensity (65% 1RM).
authors.affiliation: Exercise Physiology and Biochemistry Laboratory, The Department of Kinesiology, Texas Woman's University in Denton, Denton, Texas, USA. mreed@se.edu
authors.forename: Michael E
authors.initials: ME
authors.lastname: Reed
authors.forename: Vic
authors.initials: V
authors.lastname: Ben-Ezra
authors.forename: Kyle D
authors.initials: KD
authors.lastname: Biggerstaff
authors.forename: David L
authors.initials: DL
authors.lastname: Nichols
mesh_terms: D000293:Adolescent; D000328:Adult; D001786:Blood Glucose / Q000032:analysis / Q000502:physiology; D001823:Body Composition / Q000502:physiology; D002096:C-Peptide / Q000097:blood / Q000502:physiology; D005260:Female; D005951:Glucose Tolerance Test; D006801:Humans; D007328:Insulin / Q000097:blood / Q000502:physiology; D005082:Physical Exertion / Q000502:physiology; D055070:Resistance Training; D055815:Young Adult
chemical_list: D001786:Blood Glucose; D002096:C-Peptide; D007328:Insulin