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J Korean Soc Emerg Med > Volume 33(2); 2022 > Article
Journal of The Korean Society of Emergency Medicine 2022;33(2): 211-219.
Smartwatch를 이용한 응급의학과 전공의와 비응급의학과 전공의의 24시간 근무 시 신체적(physical) 업무강도 비교: 전향적 연구
이동현 , 강지훈 , 유재광 , 지재구 , 이시원 , 박철호 , 윤유상 , 김양원
인제대학교 의과대학 응급의학교실
Comparison of physical work intensity of emergency medicine (EM) residents and non-EM residents, measured on the smartwatch: a prospective study
Dong Hyun Lee , Ji Hun Kang , Jae Kwang Yu , Jae Gu Ji , Si Won Lee , Chul Ho Park , Yoo Sang Yoon , Yang Weon Kim
Department of Emergency Medicine, Inje University College of Medicine, Busan, Korea
Correspondence  Ji Hun Kang ,Tel: 051-890-6120, Fax: 051-891-1465, Email: mona@hanmail.net,
Received: June 29, 2021; Revised: August 26, 2021   Accepted: September 4, 2021.  Published online: April 30, 2022.
The purpose of this study was to compare the physical work intensity of emergency medicine (EM) and non-EM residents during a 24-hour work duty cycle using a smartwatch.
This study was conducted for a month from 7 May to 4 June 2021. A total of 27 residents submitted their consent to be recruited as subjects for the study. We distributed a smartwatch to each of the participants and measured their physical work intensity. Twenty non-EM residents wore a smartwatch for a week. Also, seven EM residents wore a watch during the time they were on 24-hour duty for the whole research period. After finishing their 24-hour duty, participants took off the smartwatch and stopped recording their physical activities. Sixty-five samples were matched for comparison between the non-EM and EM residents. Each of the samples comprised a pair of 24-hour records of EM and non-EM residents. The data were matched to ensure the same date and grade and thus control the variables.
The results of this study showed that the maximum heart rate of the EM residents was 129.7±3.8 beats/min, which was higher than that of the non-EM residents. A comparison of the sleep hours during the 24-hour duty showed that the average sleep time of the EM residents was 156.9±84.8 minutes, which was significantly lower than that of the non-EM residents. However, calorie consumption, moving distance, and step count during the 24-hour duty cycle showed no significant difference between the EM and non-EM residents.
The maximum heart rate was higher among EM residents during their 24-hour work duty compared to the non-EM residents. In addition, the sleep time of the EM residents was significantly lower than that of the non-EM residents.
Key words: Emergency medicine; Workload, Residency; Wearable electronic device
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