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Electromyography (EMG) is the process of acquiring electrical signals generated through muscle activity (contraction/relaxation). Surface EMG deliberates the amount of electrical activity in the musculoskeletal system in a non-invasive way. Under specific conditions and during certain motor activities, this signal is substantially associated with muscle strength. These Signals are used as Control Inputs by assistive devices. The study aimed to investigate the EMG parameters of lower limb muscles (rectus femoris and biceps femoris) for healthy subjects and transtibial amputees while walking on the treadmill at three different speeds (0.55 m/s, 0.83 m/s, and 1.11 m/s) and to compare the EMG parameters of the rectus and biceps femoris muscles between the healthy subjects and amputees. Ten non-amputee and two transtibial amputee subjects were recruited for this study. The findings indicate substantial reductions in EMG signals at slow speeds, likely to assist with foot stability. The right biceps femoris muscles had the highest signals average for all participants, while the right rectus femoris muscles had the lowest signals average for amputee subject-2 (0.0004 V), throughout the different speeds. The male participants&#x2019; right biceps femoris muscle showed the greatest signals of average treadmill walking activity at 0,55 m/s (0.0014 V) compared to the amputee individuals&#x2019; (0.001 V). At (0,83 m/s), male participants (0.0015 V) outperformed amputee subjects (0.0004 V). At (1,11 m/s), male participants (0.0024 V) outperformed amputee subjects (0.001 V). The assessment of the influence of this study can be used to assist in the rehabilitation treatment of a transtibial amputee, taking into account distance and maximum speed while using the prosthesis.

Investigation of EMG Parameters for Transtibial Amputees While Treadmill Walking with Different Speeds: A Preliminary Study