Naslov
Multisensory activity monitor accuracy during stairs climbing and stepping exercises

Autori
Caltanella, Milka

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Movement in Human Life and Health / Baić, M. ; Starosta, W. ; Drid, P ; Konarski, J. M ; Krističević, T ; Maksimović, N. - Poreč : Academic Press, 2018, 354-354

ISBN
978-86-6353-025-6

Skup
14th International Scientific Conference of Sport Kinetics

Mjesto i datum
Poreč, Hrvatska, 24.06.2018. - 27.06.2018

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
motion sensor, validity, steps counting

Sažetak
PURPOSE Increased physical activity is associated with many health benefits. Consequently, objective and subjective measures of physical activity (PA) were developed to access PA levels and energy expenditure. Although self-report diaries and questionnaires are the most used methods more attention has been paid to motion sensors such as pedometers, accelerometers and multi-sensors. The advantage of multi-sensors is possibility to estimate energy expenditure and PA levels by integrating information of more sensors such as 3-axis accelerometer, heat flux, skin temperature, and galvanic skin response sensor. All over the world people are trying to change their life habits in due to improve their health. Because of that they’ll start to use stairs instead of elevator or subscribe to fitness group sessions. That’s why the purpose of this study was to evaluate ability of multisensory activity monitor to count steps by normal stairs ascending - descending and during stepping exercises. METHODS Participants Eight healthy subjects (29.5±17.5 years) participated this study. They didn’t have any injury or walking disability that would influence the normal walking. Materials BodyMedia CORE (BodyMedia Inc., Pittsburgh, PA ) is multisensory device that integrates information from 3-axis accelerometer and other sensors such as heat flux, skin temperature, and galvanic skin response sensor and can estimate energy expenditure, number of steps, levels of physical activity and sleep quality. It was worn on the upper left arm. Manual counter was used by observer to access actual steps taken by participants during stairs ascending - descending and during stepping exercises. Metronome application, version 1.2.1. For iPhone, Dan Soper was used to keep the stepping rate at 120 BPM during testing. Study Protocol Stairs Ascending-descending Participants had one trial of familiarisation before testing. After that they had to place multisensory device over left upper arm. After acoustic signal of the device they start to climb and descend the stairs (17 stairs x 17cm) for 8 times. After last step they stayed still until acoustic sound announced ending of measurement. Study Protocol Stepping exercise Participants could try few steps to catch the rate of stepping. Rate of stepping was set up at 120 BPM. Height of the step was 15 cm (most common height during group stepping exercise). After trial multisensory device was placed over the left upper arm. After acoustic signal of the device participant started to step up and down over the step (basic step). Testing time duration was 3 minutes. After that participant had to stay still until acoustic sound appeared. RESULTS The results revealed that multisensory monitor underestimated number of step counts during stairs climbing and descending (MAD 45, 7) as well as during stepping exercise (MAD 104, 4). MAPE was much lower during stairs climbing- descending (15, 4 %) than during stepping exercise (29, 5 %). Box Plot shows grater variability of multisensory monitor steps estimation in both tests. CONCLUSION The main finding of this study is that multi- sensory monitor underestimate number of steps during stairs ascending and descending as well as during stepping exercise. The difference was major during stepping exercise. This difference might be attributed to different arm moving during stepping activities but further research is needed. This study has some limitations. Small number of participants and lack of test- retest reliability study. Actual number of steps was measured by manual counter that can be also liable to random or systematic error. Advantage of multisensory activity monitors consists in possibility to integrate information from multiple sensors and estimate energy expenditure and daily physical activity. However, they didn’t show good accuracy in counting steps especially during stepping activities.

Izvorni jezik
Engleski

Znanstvena područja
Kineziologija

POVEZANOST RADA