Interruption in physical activity bout analysis: an accelerometry research issue

BMC Research Notes

Table 3 Comparison of the physical activity lasting longer than 10 minutes allowing no breaks, a one-minute break or a two-minute break

		Continuous activity bouts	Non-continuous activity bouts allowing a 1-min interruption	Non-continuous activity bouts allowing a 2-min interruption
PA lasting ≧10-min	Number of bouts (bouts/day)	4.11±1.65	6.58±2.72**	8.97±3.55**,‡
	Daily duration (min/day)	71.62±33.66	119.03±49.35**	169.75±65.87**,‡
	Number of days with at least one bout (days/week)	6.50±1.00	6.71±0.83*	6.79±0.78**
	Number of days accumulating ≧30 min (days/week)	5.36±1.65	6.39±1.07**	6.65±0.85**
MVPA lasting ≧10-min	Number of bouts (bouts/day)	0.60±0.68	0.82±0.83*	1.02±0.88**,†
	Daily duration (min/day)	11.43±15.23	16.38±19.57*	21.28±22.37**,†
	Number of days with at least one bout (days/week)	2.49±2.22	2.96±2.27	3.47±2.17**
	Number of days accumulating ≧30 min (days/week)	1.01±1.64	1.49±1.95*	1.90±2.10**

Data are expressed as the means with the standard deviation (mean±SD).
PA; Physical activity, MVPA; moderate to vigorous intensity physical activity. *, **Significantly different compared with the Continuous activity bouts (*p<0.05, **p<0.01). †, ‡Significantly different compared with the Non-continuous activity bouts allowing a 1-min interruption (†p<0.05, ‡p<0.01).

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