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An acute bout of 4 3 4-min or 103 1-min HIIT improves b cell glucose sensitivity in postmenopausal females with type 2 diabetes: a secondary analysis
Improvements in glycemic control following acute exercise are typically attributed to improved postexercise insulin sensitivity (IS) with comparatively little known about how acute exercise impacts b cell function, especially in postmenopausal females. We determined how two high-intensity interval training (HIIT) protocols, matched for total estimated energy expenditure, impact b cell function in postmenopausal females with type 2 diabetes. Thirteen postmenopausal females (70 ± 5 yr; 12 ± 7 yr since diagnosis, 80.9 ± 13.8 kg, 32.4 ± 5.6 kg·m2; HbA1c—49.8 ± 10.3 mmol/mol [6.7 ± 1.0]) living with type 2 diabetes were included in this semirandomized crossover trial. The trial involved an initial resting control condition followed by two HIIT conditions [4 × 4-min HIIT (HIIT4) and 10 × 1-min HIIT (HIIT10)] completed in a randomized order 2–4 days apart. b cell function (glucose sensitivity) and insulin sensitivity were determined from a 2-h mixed-meal tolerance test performed 2 h after rest or HIIT. Both HIIT4 and HIIT10 significantly improved b cell glucose sensitivity compared with control (15 pmol/min/m2/[mmol/L], [95% confidence interval (CI) 6, 23]; P ¼ 0.002 and 16 pmol/min/m2/[mmol/L], [95% CI 7, 25]; P ¼ 0.002, respectively), with no difference between HIIT protocols (1 [―8, 10], P ¼ 0.79). There were no significant differences in IS metrics (Matsuda index, OGIS, Stumvoli, and QUICKI) between the conditions. An acute bout of 4 × 4-min or 10 × 1-min HIIT improves b cell glucose sensitivity in postmenopausal females living with type 2 diabetes. ClinicalTrials.gov: NCT04986345. Copyright © 2025 the American Physiological Society.
Authors : Low J.L.; Marcotte-Chénard A.; Tremblay R.; Islam H.; Falkenhain K.; Mampuya W.M.; Mari A.; McManus A.M.; Riesco E.; Little J.P.
Source : American Physiological Society
Article Information
| Year | 2025 |
| Type | Article |
| DOI | 10.1152/japplphysiol.00777.2024 |
| ISSN | 87507587 |
| Volume | 138 |
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