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Exercise Delays the Evening Rise in Glucose Concentrations

Obesity (Silver Spring, Md.), 2022-11, Vol.30, p.202-202 [Peer Reviewed Journal]

Copyright Blackwell Publishing Ltd. Nov 2022 ;ISSN: 1930-7381 ;EISSN: 1930-739X

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  • Title:
    Exercise Delays the Evening Rise in Glucose Concentrations
  • Author: Kanaley, Jill ; Porter, Jay ; Pettit-Mee, Ryan ; Parks, Elizabeth ; Lastra, Guido ; Chockalingam, Anand ; Petroski, Gregory ; Winn, Nathan
  • Subjects: Glucose ; Insulin resistance
  • Is Part Of: Obesity (Silver Spring, Md.), 2022-11, Vol.30, p.202-202
  • Description: Background: Morning hyperglycemia plays a role in the development of insulin resistance and type 2 diabetes and is due to elevated endogenous glucose production in the overnight period, with a loss of coordination between glucose concentrations and insulin secretion. Exercise stimulates glucose uptake and increases insulin sensitivity acutely and may be the ideal lifestyle intervention to minimize the nocturnal rise in glucose levels, particularly if the timing of exercise is optimized. This study examined the effect of exercise timing on evening and overnight glucose concentrations in non-obese individuals with normal fasting glucose levels (n=18) and obese (OB) individuals with and without impaired fasting glucose levels (OB+IFG; n=18 and n=16, respectively). Methods: Subjects were studied on 3 occasions (no exercise (NOEX), morning exercise (AMEX-0700 h) and evening exercise (PMEX-2000 h). The evening meal was provided (1800 h) and blood samples were taken from 1730-0700 h. Results: All subjects had increased glucose and insulin concentrations with the dinner meal with peak concentrations being higher in OB+-IFG than in OB and non-OB (p<0.01). On the NOEX day, evening glucose concentrations began to rise above baseline levels at about 2300 h in OB+IFG, while with AMEX and PMEX the increase was delayed until ~0100 h. In OB+IFG, insulin concentrations decreased following the dinner meal and continued to decrease throughout the night, despite the rising glucose concentrations. In the OB and non-OB individuals following the dinner meal, no increase in glucose concentrations occurred in the evening period and insulin levels mirrored this. There was no difference in the morning fasting glucose levels between study days or between groups. Conclusions: In conclusion, exercise delays the evening rise in glucose concentrations in adults with OB+IFG but does not improve the synchrony between glucose and insulin concentrations.
  • Publisher: Silver Spring: Blackwell Publishing Ltd
  • Language: English
  • Identifier: ISSN: 1930-7381
    EISSN: 1930-739X
  • Source: ProQuest Central
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