Lookup NU author(s): Dr Sarah Charman,
Dr Nduka Okwose,
Dr Guy MacGowan,
Dr Djordje Jakovljevic
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND).
© 2018 Elsevier Inc. The present study evaluated the effect of age on glucose tolerance and cardiac function and assessed the relationship between metabolic control and cardiac function and performance. Thirty-four healthy women aged 40 to 81 years were divided into two age groups: younger (≤50 years of age, N = 19) and older (≥60 years of age, N = 15). Participants performed an oral glucose tolerance test and a graded cardiopulmonary exercise test with non-invasive haemodynamic measurements. Compared to younger, older women demonstrated significantly higher 2-hour glucose (4.67 ± 1.01 vs 6.08 ± 1.54 mmol/l, P < 0.01), but lower peak exercise O2 consumption (1.96 ± 0.44 vs 1.38 ± 0.26 l/min, P < 0.01) and cardiac power output (4.06 ± 0.76 vs 3.35 ± 0.73 W, P = 0.01). When data from all study participants were combined, there was a significant negative relationship between 2-hour glucose and peak cardiac power (r = −0.39, P = 0.02), and peak O2 consumption (r = −0.40, P = 0.02). The strength of these relationships was affected by age, with moderate negative relationship identified between 2-hour glucose and peak cardiac power output in younger compared to older participants (r = −0.38, P = 0.11 vs. r = −0.09, P = 0.75). Metabolic control and cardiac function decline with age. The lack of relationship between glucose control and cardiac power may suggest that metabolic control does not influence cardiac function and performance in older women.
Author(s): Jones C, Markovic M, Charman S, Okwose N, Ivkovic S, Ropret R, Markovic B, Mandaric S, Grbovic M, MacGowan GA, Jakovljevic DG
Publication type: Article
Publication status: Published
Journal: Experimental Gerontology
Print publication date: 01/02/2019
Online publication date: 20/12/2018
Acceptance date: 19/12/2018
Date deposited: 01/02/2019
ISSN (print): 0531-5565
ISSN (electronic): 1873-6815
Publisher: Elsevier Inc.
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