Participants will engage in EMG-BF for 30 minutes 3 times per week for 6 weeks for a total of 18 sessions. Our novel EMG Biofeedback training system can be adapted to a training objective by planning 3 to 5 movements and placing sensors over muscles that must be active when the user adheres to the correct movement form. For our training we use right or left torso shift with knee bend, and right or left hand opening, and place sensors over left and right vastus lateralis and left and right extensor digitorum superficialis muscles.

Each movement corresponds to a specific videogame command. To introduce cognitive challenge, we randomly shuffle the game command assigned to each movement at the beginning of every session. This will require the user to choose the appropriate movement to trigger the intended game input while suppressing incorrect movements. We use the puzzle game, Tetris, which requires spatial reasoning and planning under increasingly tight time constraints.

Participants will perform 7 balance exercises traditionally prescribed by physiotherapists. The first is a heel/toe square exercise where the trainee lifts their right toe and left heel, then their left toe and right heel, then both heels, then both toes. The 2nd exercise involves maintaining tandem stance while static, then moving the arms, then looking up and down, then looking left and right. The 3rd exercise is lateral stepping where the individual steps with one foot out to the side and then bring the foot back to the starting stance. The 4th exercise is a golfer's lift where the person slowly leans forward while extending one leg straight behind and touches the seat of a chair placed opposite. The 5th exercise is extended-duration single leg stands and exercises 6 and 7 are back and side leg raises, respectively. The exercise sequence will repeat until 30 minutes has expired. Sessions are repeated 3 times per week for 6 weeks, for 18 sessions.

The intervention is an exercise training that is facilitated by feedback derived from electrical muscle activity measured through electromyography (EMG). An EMG Biofeedback software uses a machine learning algorithm to identify the desired movements and reinforce them by displaying feedback on a computer monitor in the form of videogame control. The EMG acquisition hardware must have at least 4 sensor channels and a sampling rate of >1KHz. Other than these specifications, any generic EMG amplifier can be used. The effect of the "device" is therefore primarily defined by the software. An in-depth description of the software and hardware systems is published in the cites study, "An EMG-Based Biofeedback System for Tailored Interventions Involving Distributed Muscles". In this trail is the Explore+ ExG amplifier which is sold by Mentalab.

A sensitive, reliable, and valid 14-item scale that assesses dynamic balance. It includes components evaluating anticipatory postural adjustments, responses to perturbation, sensory orientation, and dynamic stability during gait. The total score ranges from 0 ("no balance") to 28 ("complete balance").

Assesses the ability of an individual to control the center of pressure (COP) on a force platform within their base of support. Subjects are instructed to move a cursor indicating their COP away from the center of their base of support in all directions using feedback provided on a computer monitor. The feedback includes a representation of the force plate and the COP which paints the area covered by its movements. The goal communicated to the subject is to create the largest coverage area possible without lifting their feet off the plate. Total and quadrant-specific areas (i.e., Total, Front Left, Front Right, Back left, and Back Right) are measured in cm2. These measures are reliable, and published reference values exist.

At the end of every session participants make a vertical mark on a 10-centimeter horizontal line representing a continuum between "Strongly Disagree" (0 cm) and "Strongly Agree" (10 cm). The midpoint of the line (5 cm) represents "Neither Agree nor Disagree". VAS measurements are accurate and precise. Participants will respond to VAS scales with the following prompts:

• I enjoyed the training.
• The training was challenging.
• I put forth a great deal of effort.

The average of VAS values provided in each week (3 sessions per week) of participation, and across the entire 6 weeks of training (18 sessions) will be assessed.