Use of Heart Rate to Predict Energy Expenditure from Low to High Activity Levels
Abstract This study evaluated the ability to use the relationship between heart rate (HR) and oxygen uptake (V˙O 2 ) to estimate energy expenditure (EE) from low to high physical activity with different HR-based prediction equations. General prediction equations were established based on the individ...
Gespeichert in:
Veröffentlicht in: | International journal of sports medicine 2003-07, Vol.24 (5), p.332-336 |
---|---|
Hauptverfasser: | , , , , |
Format: | Artikel |
Sprache: | eng |
Schlagworte: | |
Online-Zugang: | Volltext |
Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
Zusammenfassung: | Abstract
This study evaluated the ability to use the relationship between
heart rate (HR) and oxygen uptake (V˙O
2
) to estimate energy
expenditure (EE) from low to high physical activity with different HR-based
prediction equations. General prediction equations were established based on
the individual relations between HR and EE. Possibilities to improve the EE
estimation with using alternatives for respective HR were also assessed. The
alternatives were % of HR reserve:
100 × [(activity HR - resting HR)/(maximal HR -
resting HR)], (HRR), and the difference between activity HR and resting HR
(activity HR - resting HR), (HRnet). Forty-two men (age mean 36.5 [sd
7.6] y, BMI 24.5
[2.4] kg × m
-2
,
V˙O
2
max 45.2
[6.5]) kg × ml × min
-1
and 47 women (mean age 37.5 [9.5], BMI 23.3 [3.4],
V˙O
2
max 36.3 [5.4]) performed an exercise test
consisting of physically low-activity tasks and a maximal treadmill uphill
walking test. Respiratory gases were obtained from indirect calorimetry. HR was
registered by electrocardiography and EE was calculated from
(V˙O
2
) and carbon dioxide (V˙CO
2
) production.
Generalised linear models with random effects were used for the prediction of
EE. EE values of the tests (one value at each intensity level) were predicted
in separate models by the respective HR, HRR or HRnet values. The other
predictors used in all models were body weight, sex and the intensity of
exercise. The standard error of estimate (SEE) was
1.41 kcal × min
-1
(5.89 kJ) in
the model with HR variable as a predictor, 1.01 kcal ×
min
-1
(4.22 kJ) with HRR variable, and 1.08 (4.51 kJ)
with HRnet variable. The results show that the prediction of EE is more
accurate if HRR or HRnet are used in prediction equation instead of HR. |
---|---|
ISSN: | 0172-4622 1439-3964 |
DOI: | 10.1055/s-2003-40701 |