Table 2 The rules for “Activity Level” feature formation are based on standard guidelines for activity level classification [10]

Sedentary

((Steps < 5000) ∧ (VPA*2 + MPA) *7 < 90 ∧ LPA ≥ 0)) ˅ (Steps < 5000)

0

Low active

((Steps > 4999) ∧ (VPA*2 + MPA) *7 ≥ 90 ∧ (VPA*2 + MPA) *7 < 210) ˅ (Steps > 4999 ∧ Steps < 7500)

1

Active

((Steps > 4999) ∧ (VPA*2 + MPA) *7 ≥ 210 ∧ (VPA*2 + MPA) *7 < 300) ˅ (Steps > 7499 ∧ Steps < 10,000)

2

Medium active

((Steps > 4999) ∧ (VPA*2 + MPA) *7 ≥ 300 ∧ (VPA*2 + MPA) *7 < 360)) ˅ (Steps > 9999 ∧ Steps < 12,500)

3

Highly active

((Steps > 4999) ∧ (VPA*2 + MPA) *7 ≥ 360) ˅ (Steps > 12,499)

4