Table 3

Frequency and time in bouts of physical activity by 3 different accelerometer’s epoch lengths
Epoch length
4 sec 20 sec 60 sec
Frequency (bouts/day) TPA3 3.3 ± 1.8 5.1 ± 2.0** 9.0 ± 3.3**,‡
TPA5 1.5 ± 1.1 2.7 ± 1.4** 5.6 ± 2.1**, ‡
TPA10 0.4 ± 0.5 0.8 ± 0.8** 2.2 ± 1.1**, ‡
MVPA3 1.1 ± 1.3 1.8 ± 1.3** 1.2 ± 0.9**, ‡
MVPA5 0.5 ± 0.8 0.9 ± 0.8** 0.7 ± 0.7**
MVPA10 0.2 ± 0.3 0.3 ± 0.4** 0.3 ± 0.4**
Time (min/day) TPA3 22.0 ± 15.1 41.3 ± 21.6** 101.8 ± 37.6**, ‡
TPA5 14.8 ± 13.2 30.0 ± 20.3** 80.2 ± 33.2**, ‡
TPA10 6.9 ± 9.9 15.9 ± 17.0** 47.7 ± 27.8**, ‡
MVPA3 7.7 ± 10.0 14.3 ± 12.8** 13.8 ± 13.8**
MVPA5 5.2 ± 8.1 10.3 ± 11.2** 10.6 ± 12.8**
MVPA10 2.6 ± 5.4 5.4 ± 8.8** 6.5 ± 10.5**

Data are expressed as the means with the standard deviation (mean ± SD). TPA3, TPA5, and TPA10; Bouts of physical activity lasting longer than 3 min, 5 min and 10 min. MVPA3, MVPA5, and MVPA10; Bouts of moderate to vigorous intensity physical activity lasting longer than 3 min, 5 min and 10 min.

**Significantly different compared with 4 sec (**p < 0.01). †, ‡Significantly different compared with 20 sec (p < 0.05, p < 0.01).

Ayabe et al.

Ayabe et al. BMC Research Notes 2013 6:20   doi:10.1186/1756-0500-6-20

Open Data