The experimental tests data of the SPURS device

Citation Author(s):
Harbin Institute of Technology
Submitted by:
Weiqi Lin
Last updated:
Wed, 06/05/2024 - 09:25
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A series of experiments including torque output tests, transparency tests, cardiopulmonary exercise tests and surface electromyography tests with five healthy subjects (height, 1.76 ± 0.05 m; weight, 72.5 ± 7.26 kg; age, 27.2 ± 2.86 years; all male) to validate the effectiveness of the SPURS. All participants provided written informed consent to participate in the study. Participants were asked to walk on a treadmill at a speed of 1.25 m/s under three conditions: normal shoes (without wearing the SPURS), unpowered (wearing the SPURS without assistance) and powered (wearing the SPURS with assistance). Each participant underwent each experimental condition once, and each trial lasted for 5 minutes, with a 15-minute rest provided between the two trials to prevent muscle fatigue.


All data is raw and unprocessed. 

The torque output test was performed on a torque sensor (JNNT-F, Chino Sensor). The output signal from the torque sensor was amplified using an amplifier (AD8226, Analog Devices) and collected through the ADC channel of a STM32, at a sampling frequency of 1000 Hz.

For transparency test, kinematic data of the lower limbs, including joint angles of the hip, knee and ankle, were collected using three IMUs (LPMS-CU2, Alubi) placed on the participants’ lower limbs, with a sampling frequency set at 200 Hz.

The metabolic rate was measured using a respiratory system (K5, Cosmed).

The muscle activity of the RF and the soleus was characterized by surface EMG (electromyography) signals measured using wireless electrodes (MiniX, Cometa).