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Table 1 Parameters extracted from AX3, categorized according to F.I.T.T. acronym

From: Objective assessment of physical activity and sedentary behaviour in knee osteoarthritis patients – beyond daily steps and total sedentary time

Dimension Parameter
Frequency Number of level steps
Number of ascending steps
Number of descending steps
Number of bicycling crank revolutions
Bouts of level steps
Bouts of ascending steps
Bouts of descending steps
Number of walking bouts (0–5 s)
Number of walking bouts (5–10 s)
Number of walking bouts (300–600 s)
Number of walking bouts (> 600 s)
Number of sedentary bouts (0–10 s)
Number of sedentary bouts (10–60 s)
Number of sedentary bouts (1200–1800 s)
Number of sedentary bouts (> 1800 s)
Intensity Walking cadence
Time Time spent walking
(incl. Level, ascend and descend).
Time spent bicycling
Time spent sitting
Time spent standing
Type Walking
Stair/slope ascending
Stair/slope descending
Bicycling
Sitting
Standing
STS transfers
  1. STS Sit-to-stand