Diastolic function is strongly and independently associated with cardio-respiratory fitness in central obesity
Diastolic function is strongly and independently associated with cardio-respiratory fitness in central obesity
Aims/hypothesis: Cardiorespiratory fitness (VO2 max) is an independent risk factor for type 2 diabetes; but in people at risk, factors influencing VO2 max are poorly understood. We tested the hypothesis that VO2 max is associated with diastolic function (SEVR%), (as diastolic function influences myocardial perfusion).
Methods: 47 men and women with central obesity without diabetes were studied. We measured fitness (VO2 max) by treadmill testing and diastolic function (SEVR%) by pulse wave analysis. We measured other factors influencing this relationship [insulin sensitivity (M/I) by hyperinsulinemic euglycemic clamp; fatness by MRI and DEXA; physical activity energy expenditure (METS) by Sensewear Pro2; muscle microvascular exchange capacity (Kf) by venous plethysmography].
Results: Mean age [mean (SD) was 51 (9) years]. VO2 max was associated with SEVR% (r=0.50, p=0.001), fatness (r=-0.39, p=0.008) and HbA1c (r=-0.35, p=0.018) but not with M/I, METS or Kf. In regression modelling with age, sex, fatness, and SEVR% as explanatory variables, only age, sex and SEVR% were independently associated with V02 max (SEVR% - standardised B coefficient =0.37 ((95%CIs 0.003, 0.18), p=0.007). 46% of the variance in VO2 max (r2=0.46 p=0.0001) was identified by this model.
Conclusions/interpretation: There was a strong, independent association between VO2 max and a measure of diastolic function in sedentary people with central obesity.
fitness, obesity, diastolic function, insulin sensitivity
1568-1574
Turzyniecka, Magdalena
8368c46e-6803-4750-b56c-518ea1fbf871
Wild, Sarah H.
b790195a-4aae-421b-81f7-2c18c96e6870
Krentz, Andrew J.
e2c541b2-1292-4cf1-bc0c-d06f3242156d
Chipperfield, Andrew J.
524269cd-5f30-4356-92d4-891c14c09340
Clough, Geraldine F.
9f19639e-a929-4976-ac35-259f9011c494
Byrne, Christopher D.
1370b997-cead-4229-83a7-53301ed2a43c
25 March 2010
Turzyniecka, Magdalena
8368c46e-6803-4750-b56c-518ea1fbf871
Wild, Sarah H.
b790195a-4aae-421b-81f7-2c18c96e6870
Krentz, Andrew J.
e2c541b2-1292-4cf1-bc0c-d06f3242156d
Chipperfield, Andrew J.
524269cd-5f30-4356-92d4-891c14c09340
Clough, Geraldine F.
9f19639e-a929-4976-ac35-259f9011c494
Byrne, Christopher D.
1370b997-cead-4229-83a7-53301ed2a43c
Turzyniecka, Magdalena, Wild, Sarah H., Krentz, Andrew J., Chipperfield, Andrew J., Clough, Geraldine F. and Byrne, Christopher D.
(2010)
Diastolic function is strongly and independently associated with cardio-respiratory fitness in central obesity.
Journal of Applied Physiology, 108 (6), .
(doi:10.1152/japplphysiol.00023.2010).
Abstract
Aims/hypothesis: Cardiorespiratory fitness (VO2 max) is an independent risk factor for type 2 diabetes; but in people at risk, factors influencing VO2 max are poorly understood. We tested the hypothesis that VO2 max is associated with diastolic function (SEVR%), (as diastolic function influences myocardial perfusion).
Methods: 47 men and women with central obesity without diabetes were studied. We measured fitness (VO2 max) by treadmill testing and diastolic function (SEVR%) by pulse wave analysis. We measured other factors influencing this relationship [insulin sensitivity (M/I) by hyperinsulinemic euglycemic clamp; fatness by MRI and DEXA; physical activity energy expenditure (METS) by Sensewear Pro2; muscle microvascular exchange capacity (Kf) by venous plethysmography].
Results: Mean age [mean (SD) was 51 (9) years]. VO2 max was associated with SEVR% (r=0.50, p=0.001), fatness (r=-0.39, p=0.008) and HbA1c (r=-0.35, p=0.018) but not with M/I, METS or Kf. In regression modelling with age, sex, fatness, and SEVR% as explanatory variables, only age, sex and SEVR% were independently associated with V02 max (SEVR% - standardised B coefficient =0.37 ((95%CIs 0.003, 0.18), p=0.007). 46% of the variance in VO2 max (r2=0.46 p=0.0001) was identified by this model.
Conclusions/interpretation: There was a strong, independent association between VO2 max and a measure of diastolic function in sedentary people with central obesity.
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Published date: 25 March 2010
Keywords:
fitness, obesity, diastolic function, insulin sensitivity
Organisations:
Computational Engineering and Design
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Local EPrints ID: 148113
URI: http://eprints.soton.ac.uk/id/eprint/148113
ISSN: 8750-7587
PURE UUID: 7242317a-d948-4477-a604-71452a146135
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Date deposited: 27 Apr 2010 11:28
Last modified: 14 Mar 2024 02:47
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Author:
Magdalena Turzyniecka
Author:
Sarah H. Wild
Author:
Andrew J. Krentz
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