Abstract

Objectives: We aimed to investigate accelerometer output corresponding to physical activity intensity cut-points based on percentage of peak oxygen consumption (%VO2peak) and Metabolic Equivalent of Task (MET) value in women treated for breast cancer. Design: Laboratory study. Methods: Fifty female patients shortly after completion of treatment for breast cancer were included. VO2peak was determined during a cardiopulmonary exercise test. Subsequently, patients performed ten activities with different intensities while wearing an accelerometer on the right hip and a mobile oxycon to assess oxygen consumption. We studied the relationship between energy expenditure (expressed as %VO2peak and MET-value) and accelerometer output (in counts per minute (cpm)) with linear regression analyses. We determined accelerometer output corresponding to physical activity intensity cut-points (40% and 60%VO2peak; 3 and 6 MET) using regression equations. Results: VO2peak was 22.4 mL/kg/min (SD 5.2) and resting metabolic rate was 3.1 mL/kg/min (SD 0.6). Accelerometer output corresponding to the cut-points for moderate (40% VO2peak) and vigorous intensity (60% VO2peak) were 1123 and 1911, respectively. The analyses based on MET-values resulted in accelerometer output of 1189 cpm for the moderate (3 MET) and 2768 cpm for the vigorous intensity cut-point (6 MET). Conclusions: Accelerometer outputs for moderate and vigorous intensity physical activity were lower than commonly used cut-points (i.e. 1952 and 5724 cpm), irrespective of the method used to express energy expenditure (%VO2peak versus MET-value). Thus, categorizing physical activity intensities based on general-population cut-points, may underestimate physical activity intensities for women treated for breast cancer.
Original languageEnglish
JournalJournal of Science and Medicine in Sport
Volume23
DOIs
Publication statusPublished - 1 Feb 2020

Cite this

@article{f2c87adaa97f441cb46be3e57939388b,
title = "From accelerometer output to physical activity intensities in breast cancer patients",
abstract = "Objectives: We aimed to investigate accelerometer output corresponding to physical activity intensity cut-points based on percentage of peak oxygen consumption ({\%}VO2peak) and Metabolic Equivalent of Task (MET) value in women treated for breast cancer. Design: Laboratory study. Methods: Fifty female patients shortly after completion of treatment for breast cancer were included. VO2peak was determined during a cardiopulmonary exercise test. Subsequently, patients performed ten activities with different intensities while wearing an accelerometer on the right hip and a mobile oxycon to assess oxygen consumption. We studied the relationship between energy expenditure (expressed as {\%}VO2peak and MET-value) and accelerometer output (in counts per minute (cpm)) with linear regression analyses. We determined accelerometer output corresponding to physical activity intensity cut-points (40{\%} and 60{\%}VO2peak; 3 and 6 MET) using regression equations. Results: VO2peak was 22.4 mL/kg/min (SD 5.2) and resting metabolic rate was 3.1 mL/kg/min (SD 0.6). Accelerometer output corresponding to the cut-points for moderate (40{\%} VO2peak) and vigorous intensity (60{\%} VO2peak) were 1123 and 1911, respectively. The analyses based on MET-values resulted in accelerometer output of 1189 cpm for the moderate (3 MET) and 2768 cpm for the vigorous intensity cut-point (6 MET). Conclusions: Accelerometer outputs for moderate and vigorous intensity physical activity were lower than commonly used cut-points (i.e. 1952 and 5724 cpm), irrespective of the method used to express energy expenditure ({\%}VO2peak versus MET-value). Thus, categorizing physical activity intensities based on general-population cut-points, may underestimate physical activity intensities for women treated for breast cancer.",
author = "Sweegers, {Maike G.} and Buffart, {Laurien M.} and Huijsmans, {Rosalie J.} and Konings, {Inge R.} and {van Zweeden}, {Annette A.} and Johannes Brug and Chinapaw, {Mai J. M.} and Altenburg, {Teatske M.}",
year = "2020",
month = "2",
day = "1",
doi = "10.1016/j.jsams.2019.09.001",
language = "English",
volume = "23",
journal = "Journal of Science and Medicine in Sport",
issn = "1440-2440",
publisher = "Elsevier BV",

}

From accelerometer output to physical activity intensities in breast cancer patients. / Sweegers, Maike G.; Buffart, Laurien M.; Huijsmans, Rosalie J.; Konings, Inge R.; van Zweeden, Annette A.; Brug, Johannes; Chinapaw, Mai J. M.; Altenburg, Teatske M.

In: Journal of Science and Medicine in Sport, Vol. 23, 01.02.2020.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - From accelerometer output to physical activity intensities in breast cancer patients

AU - Sweegers, Maike G.

AU - Buffart, Laurien M.

AU - Huijsmans, Rosalie J.

AU - Konings, Inge R.

AU - van Zweeden, Annette A.

AU - Brug, Johannes

AU - Chinapaw, Mai J. M.

AU - Altenburg, Teatske M.

PY - 2020/2/1

Y1 - 2020/2/1

N2 - Objectives: We aimed to investigate accelerometer output corresponding to physical activity intensity cut-points based on percentage of peak oxygen consumption (%VO2peak) and Metabolic Equivalent of Task (MET) value in women treated for breast cancer. Design: Laboratory study. Methods: Fifty female patients shortly after completion of treatment for breast cancer were included. VO2peak was determined during a cardiopulmonary exercise test. Subsequently, patients performed ten activities with different intensities while wearing an accelerometer on the right hip and a mobile oxycon to assess oxygen consumption. We studied the relationship between energy expenditure (expressed as %VO2peak and MET-value) and accelerometer output (in counts per minute (cpm)) with linear regression analyses. We determined accelerometer output corresponding to physical activity intensity cut-points (40% and 60%VO2peak; 3 and 6 MET) using regression equations. Results: VO2peak was 22.4 mL/kg/min (SD 5.2) and resting metabolic rate was 3.1 mL/kg/min (SD 0.6). Accelerometer output corresponding to the cut-points for moderate (40% VO2peak) and vigorous intensity (60% VO2peak) were 1123 and 1911, respectively. The analyses based on MET-values resulted in accelerometer output of 1189 cpm for the moderate (3 MET) and 2768 cpm for the vigorous intensity cut-point (6 MET). Conclusions: Accelerometer outputs for moderate and vigorous intensity physical activity were lower than commonly used cut-points (i.e. 1952 and 5724 cpm), irrespective of the method used to express energy expenditure (%VO2peak versus MET-value). Thus, categorizing physical activity intensities based on general-population cut-points, may underestimate physical activity intensities for women treated for breast cancer.

AB - Objectives: We aimed to investigate accelerometer output corresponding to physical activity intensity cut-points based on percentage of peak oxygen consumption (%VO2peak) and Metabolic Equivalent of Task (MET) value in women treated for breast cancer. Design: Laboratory study. Methods: Fifty female patients shortly after completion of treatment for breast cancer were included. VO2peak was determined during a cardiopulmonary exercise test. Subsequently, patients performed ten activities with different intensities while wearing an accelerometer on the right hip and a mobile oxycon to assess oxygen consumption. We studied the relationship between energy expenditure (expressed as %VO2peak and MET-value) and accelerometer output (in counts per minute (cpm)) with linear regression analyses. We determined accelerometer output corresponding to physical activity intensity cut-points (40% and 60%VO2peak; 3 and 6 MET) using regression equations. Results: VO2peak was 22.4 mL/kg/min (SD 5.2) and resting metabolic rate was 3.1 mL/kg/min (SD 0.6). Accelerometer output corresponding to the cut-points for moderate (40% VO2peak) and vigorous intensity (60% VO2peak) were 1123 and 1911, respectively. The analyses based on MET-values resulted in accelerometer output of 1189 cpm for the moderate (3 MET) and 2768 cpm for the vigorous intensity cut-point (6 MET). Conclusions: Accelerometer outputs for moderate and vigorous intensity physical activity were lower than commonly used cut-points (i.e. 1952 and 5724 cpm), irrespective of the method used to express energy expenditure (%VO2peak versus MET-value). Thus, categorizing physical activity intensities based on general-population cut-points, may underestimate physical activity intensities for women treated for breast cancer.

UR - https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85072248901&origin=inward

UR - https://www.ncbi.nlm.nih.gov/pubmed/31537492

U2 - 10.1016/j.jsams.2019.09.001

DO - 10.1016/j.jsams.2019.09.001

M3 - Article

VL - 23

JO - Journal of Science and Medicine in Sport

JF - Journal of Science and Medicine in Sport

SN - 1440-2440

ER -