Exercise Intensity and Substrate Utilization in Healthy
Sedentary Females Using the Life-Build-Line Device
Nichanun Panyaek MSc*, Dhavee Sirivong MD**, Kurusart Konharn PhD***,
Orathai Tunkamnerdthai MSc****, Ploypailin Aneknun MSc*****, Naruemon Leelayuwat PhD****,*****
Affiliation :
* Department of Rehabilitation, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
** Department of Medicine, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
*** Division of Physical Therapy, Faculty of Associated Medical Sciences, Khon Kaen University, Khon Kaen, Thailand
**** Department of Physiology, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
***** Exercise and Sport Sciences Development and Research Group, Khon Kaen University, Khon Kaen, Thailand
Background : Life-Build-Line (LBL) is a new exercise device that is convenient, and not so expensive. Together with the
style of movement, it may boost one to adhere to the exercise regimen and thereby promote better health. However, no study
has proved its exercise intensity and effect on substrate utilization.
Objective : To investigate exercise intensity in healthy sedentary women using LBL and measure their substrate utilization
during exercise. The former session was determined by measuring absolute [i.e., energy expenditure (EE)] and relative
[i.e., percentage of rate of peak oxygen consumption (V̇ O2 peak), maximal heart rate (HRmax ), rating of perceived exertion
(RPE), and rating of perceived dyspnea (RPD)] indicators, whereas the latter was determined by measuring oxygen
consumption and carbon dioxide production (V̇ CO2 ).
Material and Method: Ten female subjects randomly performed two visits of exercise at least seven days apart. The first
was a peak exercise test, and the second consisted of three 30-minute sessions of rest, exercise with LBL, and recovery. The
V̇ O2, V̇ CO2, and EE were determined based on the expired air at the last five minutes of resting and exercise, whereas
electrocardiograms were recorded to measure HR throughout the three sessions. Subjects were asked to provide RPE and
RPD at the end of the exercise session.
Results : During exercise with LBL, average %V̇ O2 peak and %HRmax were 43.5%±2.32% and 52.8%±1.81%, respectively,
while EE, RPE, and RPD were 3.01±0.53 metabolic equivalents, 12.2±1.8, and 3.0±1.41, respectively. In addition, fat and
especially CHO utilization were increased by the exercise.
Conclusion : These findings indicate that LBL offers a means of low-intensity exercise in healthy females while still providing
physiological and metabolic benefits.
Keywords : Oxygen consumption, Heart rate, Energy expenditure, Exertion, Dyspnea, Women
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