Abstract
BACKGROUND: Wrist-Worn Activity Monitors(WWAMs) are low-cost, user-friendly devices which have become popular for monitoring physical activity. Their reliability and validity need investigation for accurate physical activity monitoring. We examined between-sessions and inter-device reliability of the WWAMs. In addition, we examined the criteria-related validity of the WWAMs against two gold standards, an Ankle-Worn Activity monitor (AWAM) and video. METHODS: Twenty volunteers participated in two sessions, one week apart. In each session, participants walked on a treadmill for five minutes at each of the three speeds: 0.89 m/s (slow),1.12 m/s (moderate) and 1.33 m/s (fast). Total step counts at each speed were obtained using one AWAM (stepWatch), three-WWAMs (Fitbit Flex) and video. The Intraclass Correlation Coefficient (ICC) was calculated to determine the reliability and validity of the WWAMs. RESULTS: The WWAMs exhibited moderate to excellent between-sessions reliability (ICC = 0.69-0.90). The WWAMs demonstrated excellent inter-device reliability at each speed across both sessions (ICC = 0.91-0.98). The criteria-related validity ofWWAMscompared to theAWAM, and video recording showed moderate to excellent agreement (ICC = 0.67-0.85) at each speed. CONCLUSIONS:WWAMs recorded steps consistently between-sessions and between-devices for treadmillwalking among healthy adults at each speed but exhibited limited agreement for recording steps at each speed compared to AWAMand video.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 117-124 |
| Number of pages | 8 |
| Journal | Physiotherapy Practice and Research |
| Volume | 39 |
| Issue number | 2 |
| DOIs | |
| State | Published - Jan 1 2018 |
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Keywords
- between-sessions reliability
- Inter-device reliability
- treadmill walking
ASJC Scopus subject areas
- Physical Therapy, Sports Therapy and Rehabilitation
- Rehabilitation
- Occupational Therapy
Cite this
Reliability and validity of wrist-worn activity monitors in healthy young adults. / Ali, Eglal; Wani, Dipti; Ling, Wen; Rao, Smita.
In: Physiotherapy Practice and Research, Vol. 39, No. 2, 01.01.2018, p. 117-124.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Reliability and validity of wrist-worn activity monitors in healthy young adults
AU - Ali, Eglal
AU - Wani, Dipti
AU - Ling, Wen
AU - Rao, Smita
PY - 2018/1/1
Y1 - 2018/1/1
N2 - BACKGROUND: Wrist-Worn Activity Monitors(WWAMs) are low-cost, user-friendly devices which have become popular for monitoring physical activity. Their reliability and validity need investigation for accurate physical activity monitoring. We examined between-sessions and inter-device reliability of the WWAMs. In addition, we examined the criteria-related validity of the WWAMs against two gold standards, an Ankle-Worn Activity monitor (AWAM) and video. METHODS: Twenty volunteers participated in two sessions, one week apart. In each session, participants walked on a treadmill for five minutes at each of the three speeds: 0.89 m/s (slow),1.12 m/s (moderate) and 1.33 m/s (fast). Total step counts at each speed were obtained using one AWAM (stepWatch), three-WWAMs (Fitbit Flex) and video. The Intraclass Correlation Coefficient (ICC) was calculated to determine the reliability and validity of the WWAMs. RESULTS: The WWAMs exhibited moderate to excellent between-sessions reliability (ICC = 0.69-0.90). The WWAMs demonstrated excellent inter-device reliability at each speed across both sessions (ICC = 0.91-0.98). The criteria-related validity ofWWAMscompared to theAWAM, and video recording showed moderate to excellent agreement (ICC = 0.67-0.85) at each speed. CONCLUSIONS:WWAMs recorded steps consistently between-sessions and between-devices for treadmillwalking among healthy adults at each speed but exhibited limited agreement for recording steps at each speed compared to AWAMand video.
AB - BACKGROUND: Wrist-Worn Activity Monitors(WWAMs) are low-cost, user-friendly devices which have become popular for monitoring physical activity. Their reliability and validity need investigation for accurate physical activity monitoring. We examined between-sessions and inter-device reliability of the WWAMs. In addition, we examined the criteria-related validity of the WWAMs against two gold standards, an Ankle-Worn Activity monitor (AWAM) and video. METHODS: Twenty volunteers participated in two sessions, one week apart. In each session, participants walked on a treadmill for five minutes at each of the three speeds: 0.89 m/s (slow),1.12 m/s (moderate) and 1.33 m/s (fast). Total step counts at each speed were obtained using one AWAM (stepWatch), three-WWAMs (Fitbit Flex) and video. The Intraclass Correlation Coefficient (ICC) was calculated to determine the reliability and validity of the WWAMs. RESULTS: The WWAMs exhibited moderate to excellent between-sessions reliability (ICC = 0.69-0.90). The WWAMs demonstrated excellent inter-device reliability at each speed across both sessions (ICC = 0.91-0.98). The criteria-related validity ofWWAMscompared to theAWAM, and video recording showed moderate to excellent agreement (ICC = 0.67-0.85) at each speed. CONCLUSIONS:WWAMs recorded steps consistently between-sessions and between-devices for treadmillwalking among healthy adults at each speed but exhibited limited agreement for recording steps at each speed compared to AWAMand video.
KW - between-sessions reliability
KW - Inter-device reliability
KW - treadmill walking
UR - http://www.scopus.com/inward/record.url?scp=85063234698&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85063234698&partnerID=8YFLogxK
U2 - 10.3233/PPR-180114
DO - 10.3233/PPR-180114
M3 - Article
VL - 39
SP - 117
EP - 124
JO - Physiotherapy Practice and Research
JF - Physiotherapy Practice and Research
SN - 2213-0683
IS - 2
ER -