Decide on which muscle to test.
Determine the exercise you want to use to test the specific muscle. For example, if testing the triceps, use the triceps raise. If testing the calf, use the calf raise.
Attach the accelerometer to the part of the body that moves the most during the exercise. For a triceps raise, put the accelerometer on the subject's wrist. If using the calf raise, put the accelerometer at the top of the leg.
Ask the subject to perform the exercise with the maximum force as possible. Take note of the acceleration for each repetition. Ensure that the subject uses correct form throughout the exercise.
Plot the data points to visualize fatigue. Use repetitions as the x-axis and the acceleration as the y-axis. The acceleration should decrease as the repetitions increase.