Key result
NL-1000 monitor accurately captures ~91% of actual exercise time during brisk walking.
Why the study?
Does the NL-1000 activity monitor accurately measure moderate to vigorous physical activity during treadmill walking and running in healthy adults?
Cross-Sectional (n=70)
No
Does the NL-1000 activity monitor accurately measure moderate to vigorous physical activity during treadmill walking and running in healthy adults?
p-value: p=<0.05
The NL-1000 activity monitor provides a valid and reliable assessment of moderate to vigorous physical activity during horizontal walking at speeds ≥85 m/min, independent of age, sex, and BMI.
Supports NL-1000 for controlled MVPA assessment; leaves open validation in free-living or clinical populations.
Purpose: The purpose of the present investigation was to examine the validity and reliability of the simple moderate to vigorous physical activity (MVPA) monitor (NL-1000; NEWLIFESTYLES, MO) during treadmill walking and running.Methods: A total of 70 men and women, between 22 to 76 years of age, participated in the present investigation. Subjects continuously wore the NL-1000 device on their waist. The NL-1000 calculated the time spent in MVPA corresponding to › 3 METs. All subjects walked at speeds of 40 to 115 m.min-1 and ran at a speed of 130 m.min-1 on a motor driven treadmill for four minutes. Furthermore, eight of all subjects performed a second experiment in order to assess the reliability of NL-1000.Results: The MVPA measured by the NL-1000 (MVPAped) significantly increased at a walking at the speed of faster than 85m.min-1 (p ‹ 0.05). Of the actual exercise time, MVPAped corresponded to › 90% of the actual exercise time in › 85 m.min-1 or faster speed. A multiple regression analysis showed that gender, body mass index, and age did not significantly affect the accuracy of MVPAped, and the treadmill speed came out significant parameter of MVPAped. The MVPAped did not differ significantly within the first and second experiment, furthermore, the results correlated significantly (r = 0.956, p ‹ 0.001).Conclusion: These results indicate that simple MVPA monitor would be a valid instrument to during the treadmill walking and running.
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Ayabe et al. (2011) conducted a cross-sectional in Healthy adults (n=70). NL-1000 physical activity monitor vs. Actual exercise time was evaluated on Proportion of actual exercise time recorded as moderate to vigorous physical activity (MVPA) at 85 m/min (p=<0.05). The NL-1000 activity monitor accurately captured over 90% of actual exercise time during walking at speeds of 85 m/min or faster, with accuracy unaffected by age, gender, or body mass index.
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