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An exploratory study of cardiac function and oxygen uptake during cycle ergometry in overweight children.

Publication ,  Journal Article
Unnithan, VB; Baynard, T; Potter, CR; Barker, P; Heffernan, KS; Kelly, E; Yates, G; Fernhall, B
Published in: Obesity (Silver Spring)
November 2007

OBJECTIVE: Obesity has been proposed to negatively impact cardiac function in overweight (OW) individuals. The relationship between diastolic dysfunction and oxygen uptake (Vo(2)) kinetics is equivocal. This exploratory investigation evaluated the relationship between resting left ventricular function and Vo(2) kinetics during cycle ergometry in OW and non-overweight (NO) children and adolescents. RESEARCH METHODS AND PROCEDURES: Fourteen OW (>85 percentile for BMI for age and gender) children, 10 boys and 4 girls (age, 11.7 +/- 1.9 years; body mass, 80.6 +/- 45.5 kg) and 10 NO children (4 boys, 6 girls) volunteered to participate in the study (age, 12.5 +/- 2.1 years; body mass, 45.8 +/- 13.8 kg). Resting cardiovascular structure and function were assessed using spectral Doppler echocardiography. All subjects underwent two sub-maximal exercise stages on a cycle ergometer (3 minutes unloaded and 5 minutes at 50 W, both at a cadence of 50 rpm). Respiratory data were measured on a breath-by-breath basis at both workloads and the mean response time (MRT) was calculated. RESULTS: Analysis of the MRT data demonstrated that there were no significant differences between OW and NO (OW, 52.6 +/- 11.7 seconds vs. NO, 45.6 +/- 7.4 seconds). Significant correlations (p < 0.05) were obtained between MRT Vo(2) and echocardiographic-derived mitral valve inflow pressure half-time (r = 0.55) and between MRT Vo(2), and mitral valve inflow deceleration time (r = 0.55). DISCUSSION: The evidence from this research suggests a possible link between left ventricular diastolic function at rest and oxygen uptake kinetics during sub-maximal exercise in OW and NO children and adolescents.

Duke Scholars

Published In

Obesity (Silver Spring)

DOI

ISSN

1930-7381

Publication Date

November 2007

Volume

15

Issue

11

Start / End Page

2673 / 2682

Location

United States

Related Subject Headings

  • Ventricular Function, Left
  • Oxygen Consumption
  • Overweight
  • Male
  • Humans
  • Heart
  • Female
  • Exercise Test
  • Exercise
  • Endocrinology & Metabolism
 

Citation

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Unnithan, V. B., Baynard, T., Potter, C. R., Barker, P., Heffernan, K. S., Kelly, E., … Fernhall, B. (2007). An exploratory study of cardiac function and oxygen uptake during cycle ergometry in overweight children. Obesity (Silver Spring), 15(11), 2673–2682. https://doi.org/10.1038/oby.2007.319
Unnithan, Viswanath B., Tracy Baynard, Christopher R. Potter, Piers Barker, Kevin S. Heffernan, Erin Kelly, Greg Yates, and Bo Fernhall. “An exploratory study of cardiac function and oxygen uptake during cycle ergometry in overweight children.Obesity (Silver Spring) 15, no. 11 (November 2007): 2673–82. https://doi.org/10.1038/oby.2007.319.
Unnithan VB, Baynard T, Potter CR, Barker P, Heffernan KS, Kelly E, et al. An exploratory study of cardiac function and oxygen uptake during cycle ergometry in overweight children. Obesity (Silver Spring). 2007 Nov;15(11):2673–82.
Unnithan, Viswanath B., et al. “An exploratory study of cardiac function and oxygen uptake during cycle ergometry in overweight children.Obesity (Silver Spring), vol. 15, no. 11, Nov. 2007, pp. 2673–82. Pubmed, doi:10.1038/oby.2007.319.
Unnithan VB, Baynard T, Potter CR, Barker P, Heffernan KS, Kelly E, Yates G, Fernhall B. An exploratory study of cardiac function and oxygen uptake during cycle ergometry in overweight children. Obesity (Silver Spring). 2007 Nov;15(11):2673–2682.
Journal cover image

Published In

Obesity (Silver Spring)

DOI

ISSN

1930-7381

Publication Date

November 2007

Volume

15

Issue

11

Start / End Page

2673 / 2682

Location

United States

Related Subject Headings

  • Ventricular Function, Left
  • Oxygen Consumption
  • Overweight
  • Male
  • Humans
  • Heart
  • Female
  • Exercise Test
  • Exercise
  • Endocrinology & Metabolism