Integrated Wearable System for Monitoring Heart Rate and Step during Physical Activity

Table 1

Relationship between peak-to-valley amplitude and adaptive threshold.

Peak amplitude (m/s^2)	Peak-to-valley amplitude	Adapt. THR.; (number of samples (second))	Walking status
<1.25	<50		Resting
1.25~1.36	50~200	22 (0.44)	Walking
1.36~1.44	200~300	20 (0.40)
1.44~1.50	300~500	17 (0.34)
1.50~2.03	500~650	15 (0.30)
2.03~2.25	650~850	13 (0.26)
2.25~2.61	850~1100	11 (0.22)
2.62~2.82	1100~1600	10 (0.20)
>2.82	>1600	9 (0.18)	Running