Determination of anaerobic threshold through heart rate and near infrared spectroscopy in elderly healthy men
Braz. j. phys. ther. (Impr.)
;
17(5): 506-515, out. 2013. tab, graf
Article
Dans Anglais
| LILACS
| ID: lil-689921
ABSTRACT
BACKGROUND:
Aging leads to low functional capacity and this can be reversed by safe and adequate exercise prescription.OBJECTIVE:
The aim of this study was to identify the anaerobic threshold (AT) obtained from the V-slope method as well as visual inspection of oxyhemoglobin ( O2Hb) and deoxyhemoglobin (HHb) curves and compare findings with the heteroscedastic (HS) method applied to carbon dioxide production ( CO2), heart rate (HR), and HHb data in healthy elderly men. A secondary aim was to assess the degree of agreement between methods for AT determination.METHOD:
Fourteen healthy men (61.4±6.3 years) underwent cardiopulmonary exercise testing (CPX) on a cycle ergometer until physical exhaustion. Biological signals collected during CPX included ventilatory and metabolic variables; spectroscopy quasi-infrared rays - NIRS; and HR through a cardio-frequency meter.RESULTS:
We observed temporal equivalence and similar values of power (W), absolute oxygen consumption (O2 - mL/min), relative O2 ( mL.Kg - 1.min -1), and HR at AT by the detection methods performed. In addition, by the Bland-Altman plot, HR confirmed good agreement between the methods with biases between -1.3 and 3.5 beats per minute.CONCLUSIONS:
(i) all detection methods were sensitive in identifying AT, including the HS applied to HR and (ii) the methods showed a good correlation in the identification of AT. Thus, these results support HR as valid and readily available parameter in determining AT in healthy elderly men. .
Texte intégral:
Disponible
Indice:
LILAS (Amériques)
Sujet Principal:
Seuil anaérobie
/
Spectroscopie proche infrarouge
/
Rythme cardiaque
Type d'étude:
Étude pronostique
Limites du sujet:
Adulte très âgé
/
Humains
/
Mâle
langue:
Anglais
Texte intégral:
Braz. j. phys. ther. (Impr.)
Thème du journal:
MEDICINA FISICA E REABILITACAO
Année:
2013
Type:
Article
Pays d'affiliation:
Brésil
Institution/Pays d'affiliation:
Universidade Federal do Rio de Janeiro/BR
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