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. 2020 Jul 24;11:747. doi: 10.3389/fneur.2020.00747

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Copyright © 2020 Chua, Lim, Lim, Lim, Hoo, Chua, Chee, Ong, Liu and Wong.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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The “Settings” page in the VASST II which allows the supervising physiotherapist to adjust the exercise algorithm based on each patient's specific parameters. The Start Speed (A) of the treadmill is set by the physiotherapist. Certain features (e.g., Absolute Max Speed) carry a small padlock symbol (B) to indicate pre-programmed parameters which are fixed for subject safety. Adjustable parameters could be adjusted in this order: (1) Audio Prompt Control: to turn on/off the audio beep function; (2) Red Start Line Control: to turn on/off the red starting line indicator on the moving treadmill belt; (3) Rehab Focus: allows the physiotherapist to select which leg (right, left, or both) should be the focus of that particular exercise session (however, this function was disabled for VASST II); (4) Start Speed: set by the physiotherapist before each training epoch (10 min) based on the physiotherapist's clinical judgement and comfort level of the subject; (5) Speed Increment: while the default is 0.1 km/h, the supervising physiotherapist may adjust this to challenge the subject; (6) Stage Total: to set the number of training epochs (maximum of 5); (7) Step Total: to set the number of sections in each epoch; and (8) Step Duration: to adjust the duration of each section in each of the training epochs (the default duration is 1 min). Other parameters were non-adjustable, such as Automated Unweighting and Linear Positioning, where the values were set as AutoPID (Automatic Proportional–Integral–Derivative) (C)—this could enable or disable the automatic control function of the overhead harness suspension.