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- Title
Cross-Validation of Single-Stage Treadmill Tests for Predicting Aerobic Fitness in Adolescents With Type I Diabetes.
- Authors
Francis, Shelby L.; Singhvi, Ajay; Tsalikian, Eva; Tansey, Michael J.; Janz, Kathleen F.
- Abstract
Purpose: Determining fitness is important when assessing adolescents with type 1 diabetes mellitus (T1DM). Submaximal tests estimate fitness, but none have been validated in this population. This study cross-validates the Ebbeling and Nemeth equations to predict fitness (VO2max (ml/kg/min)) in adolescents with Tl DM. Methods: Adolescents with T1DM (n = 20) completed a maximal treadmill test using indirect calorimetry. Participants completed one 4-min stage between 2.0 and 4.5 mph and 5% grade (Ebbeling/Nemeth protocol). Speed and grade were then increased until exhaustion. Predicted VO2max was calculated using the Ebbeling and Nemeth equations and compared with observed VO2max using paired / tests Pearson correlation coefficients, 95% confidence intervals, coefficients of determination (R²), and total error (TE) were calculated. Results: The mean observed VO2max was 47.0 ml/kg/min (SD = 6.9); the Ebbeling and Nemeth mean predictions were 42.4 (SD = 9.4) and 43.5 ml/kg/min (SD = 6.9), respectively. Paired t tests resulted in statistically significant (p < .01) mean differences between observed and predicted VO2max for both predictions. The association between the Ebbeling prediction and observed VO2max was r = .90 (95% CI = 0.76, 0.96), R² = .81, and TE = 6.5 ml/kg/ min. The association between the Nemeth prediction and observed V02max was r= .81 (95% CI = 0.57,0.92), R²= .66, and TE = 5.6 ml/kg/min. Conclusion: The Nemeth submaximal treadmill protocol provides a better estimate of fitness than the Ebbeling in adolescents with T1DM.
- Subjects
PHYSICAL fitness; EXERCISE tests; ADIPOSE tissues; CALORIMETRY; CARDIOPULMONARY system; CONFIDENCE intervals; STATISTICAL correlation; HEART beat; TYPE 1 diabetes; RESEARCH methodology; PLETHYSMOGRAPHY; STATISTICS; T-test (Statistics); STATISTICAL power analysis; TREADMILLS; BODY mass index; OXYGEN consumption; RESEARCH methodology evaluation; DESCRIPTIVE statistics
- Publication
Pediatric Exercise Science, 2015, Vol 27, Issue 3, p396
- ISSN
0899-8493
- Publication type
Article
- DOI
10.1123/pes.2014-0146