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Table 6 Difficulty levels and their corresponding perturbations of treadmill belt acceleration/deceleration, speed (increase) and duration of unilateral treadmill acceleration and deceleration

From: Perturbation-based balance training to improve balance control and reduce falls in older adults – study protocol for a randomized controlled trial

Difficulty level

Acceleration/Deceleration (m/s2)

Speed (increase/decrease, m/s)

Duration (s)

1

3

0.5

0.20

2

3

0.85

0.28

3

3

1.2

0.36

4

3

1.55

0.44

5

3

1.9

0.52

6

3

2.25

0.60

7

3

2.5

0.68

  1. Speed: The increase or decrease in unilateral treadmill belt speed in m/s for each difficulty level. Duration: The amount of time during which the increased speed is maintained