Prediction of maximal heart rate in individuals with mental retardation

Prediction of maximal heart rate in individuals with mental retardation

Author Fernhall, B. Google Scholar
McCubbin, J. A. Google Scholar
Pitetti, K. H. Google Scholar
Rintala, P. Google Scholar
Rimmer, J. H. Google Scholar
Millar, A. L. Google Scholar
Silva, Antonio de Autor UNIFESP Google Scholar
Institution George Washington Univ
Oregon State Univ
Wichita State Univ
Univ Jyvaskyla
Univ Illinois
Andrews Univ
Universidade Federal de São Paulo (UNIFESP)
Abstract Purpose: It is well known that individuals with mental retardation (MR), especially those with Down syndrome (DS), have low maximal heart rates (MHR). We evaluated the ability to predict MHR in individuals with MR and DS in comparison with persons without MR. Methods: Subjects completed a maximal exercise test on the treadmill with metabolic and HR measurements. Stepwise multiple regression was used to develop prediction equations for subjects with MR (N=276; 97 with DS) and without (N=296) MR, ranging in age from 9-46 yr. Results: Subjects with MR exhibited significantly lower MHR (177 vs 185 beats.min(-1)) and (V)over dotO(2peak) (33.8 vs 35.6 mL-kg(-1).min(-1)). in subjects with MR, age was a poor predictor of MHR, Y=189 - 0.59 (age) (R=0.30, SEE=13.8 beats.min(-1); P<0.01), but age was a better predictor for subjects without MR, Y=205 - 0.64 (age) (R=0.52, SEE=9.9 beats.min(-1); P<0.01). A large sample Z test indicated that these regression coefficients were significantly different (P<0.01). However, adding DS to the regression improved the prediction for subjects with MR, Y=210 - (0.56 age) - (15.5 DS) (R=0.57; SEE=11.8 beats.min(-1), P<0.01). Conclusion: MHR can be predicted with similar accuracy in subjects with and without MR, provided DS is accounted for in the equation for the subjects with MR.
Keywords peak exercise
prediction formulas
Language English
Date 2001-10-01
Published in Medicine and Science in Sports and Exercise. Philadelphia: Lippincott Williams & Wilkins, v. 33, n. 10, p. 1655-1660, 2001.
ISSN 0195-9131 (Sherpa/Romeo, impact factor)
Publisher Lippincott Williams & Wilkins
Extent 1655-1660
Access rights Open access Open Access
Type Article
Web of Science ID WOS:000171403100007

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