Presentation Title

Validity of wearable physical activity monitors during activities of daily living

Advisor Information

Jung-Min Lee

Location

Dr. C.C. and Mabel L. Criss Library

Presentation Type

Poster

Start Date

6-3-2015 2:00 PM

End Date

6-3-2015 3:30 PM

Abstract

There are a number of PA monitors that have been developed in the last 5 years,but little information about the validity of these monitors exist. PURPOSE: The purpose of this study is to evaluate the validity of wearable activity monitors in SPT and EE under free-living environment. METHODS: Sixteen (27.1+5.4 years) healthy males (n=12) and females (n=4) participated in this study. Total SPT and EE were measured by eight monitors. The monitors were worn for at least 23 hours, and no PA restriction were applied. The SWA and a sleep log were used as a criterion measures. RESULTS: 24 hours of EE (Kcal) (means±SD) were 3123.1±730, 2355.71±528, 2393.86±612, 2240.33±273, 2075.47±87, 2901.5±658, 2926.58 ±576, and 2695.25±600 for VF, JU, PL, BB1, FB, NFB, and MF, respectively. Mean absolute percent errors were calculated (means±SD) 24.4%±8.1, 23.3%±10.7, 15.6%±17.4, 31.8%±87.1, 9.5%±9.6, 5.7%±7.6, and 11.4%±11.2 for the VF, JU, PL, BB1, FB, NFB, and MF, respectively. SPT in minutes (mean±SD) were 464.0±66.4, 401.0±72.9, 460.7±61.4, 457.4±73.8, 504.3±85.5, 439.0±120.8, 443.8±49.2, and 457.8±112.8 for the log, SWA, VF, JU, PL, BB1, FB, and NFB, respectively. MAPE were calculated for SPT (mean±SD) 13.57±9.7%, 0.71±7.6%, 1.41±11.1%, 8.69±28.6%, 5.38±81.9%, 4.38±25.9%, and 1.34±69.8% for the SWA, VF, JU, PL, BB1, FB, and MF, respectively. ANOVA and post- hoc analyses with LSD indicated no significant differences were found with the FB, NFB, and MF in EE estimates. Additional post-hoc analyses with LSD for SPT revealed no significant difference (P>.05) in all monitors except SWA. CONCLUSION: The study indicates that FF, MS, and NFB are most accurate wearable activity monitors when estimating EE and all monitors provide reasonable estimates of sleep period time, except SWA. Word counts: 1,970/2,000 (no space).

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COinS
 
Mar 6th, 2:00 PM Mar 6th, 3:30 PM

Validity of wearable physical activity monitors during activities of daily living

Dr. C.C. and Mabel L. Criss Library

There are a number of PA monitors that have been developed in the last 5 years,but little information about the validity of these monitors exist. PURPOSE: The purpose of this study is to evaluate the validity of wearable activity monitors in SPT and EE under free-living environment. METHODS: Sixteen (27.1+5.4 years) healthy males (n=12) and females (n=4) participated in this study. Total SPT and EE were measured by eight monitors. The monitors were worn for at least 23 hours, and no PA restriction were applied. The SWA and a sleep log were used as a criterion measures. RESULTS: 24 hours of EE (Kcal) (means±SD) were 3123.1±730, 2355.71±528, 2393.86±612, 2240.33±273, 2075.47±87, 2901.5±658, 2926.58 ±576, and 2695.25±600 for VF, JU, PL, BB1, FB, NFB, and MF, respectively. Mean absolute percent errors were calculated (means±SD) 24.4%±8.1, 23.3%±10.7, 15.6%±17.4, 31.8%±87.1, 9.5%±9.6, 5.7%±7.6, and 11.4%±11.2 for the VF, JU, PL, BB1, FB, NFB, and MF, respectively. SPT in minutes (mean±SD) were 464.0±66.4, 401.0±72.9, 460.7±61.4, 457.4±73.8, 504.3±85.5, 439.0±120.8, 443.8±49.2, and 457.8±112.8 for the log, SWA, VF, JU, PL, BB1, FB, and NFB, respectively. MAPE were calculated for SPT (mean±SD) 13.57±9.7%, 0.71±7.6%, 1.41±11.1%, 8.69±28.6%, 5.38±81.9%, 4.38±25.9%, and 1.34±69.8% for the SWA, VF, JU, PL, BB1, FB, and MF, respectively. ANOVA and post- hoc analyses with LSD indicated no significant differences were found with the FB, NFB, and MF in EE estimates. Additional post-hoc analyses with LSD for SPT revealed no significant difference (P>.05) in all monitors except SWA. CONCLUSION: The study indicates that FF, MS, and NFB are most accurate wearable activity monitors when estimating EE and all monitors provide reasonable estimates of sleep period time, except SWA. Word counts: 1,970/2,000 (no space).