Participants will receive a paper packet with instructions to imagine themselves performing seated maximal leg extension exercises. They will be instructed to imagine the feeling of the exercise for 5 seconds, rest for 5 seconds, and repeat this 50 times with a 2-minute rest period after the 25th repetition. They will also be asked to keep track of the exercises with tallies on a table within the packet and also to record on this table if they did not complete the exercises for that day. The participant is asked to perform the exercises on five consecutive days.

Participants will receive a paper packet with instructions to imagine themselves performing maximal standing squat exercises. They will be instructed to imagine the feeling of the exercise for 5 seconds, rest for 5 seconds, and repeat this 50 times with a 2-minute rest period after the 25th repetition. They will also be asked to keep track of the exercises with tallies on a table within the packet and also to record on this table if they did not complete the exercises for that day. The participant is asked to perform the exercises on five consecutive days.

Participants will receive a paper packet with instructions to imagine themselves performing seated maximal leg extension exercises. They will be instructed to imagine the feeling of the exercise for 5 seconds, rest for 5 seconds, and repeat this 50 times with a 2-minute rest period after the 25th repetition. They will also be asked to keep track of the exercises with tallies on a table within the packet and also to record on this table if they did not complete the exercises for that day. The participant is asked to perform the exercises on five consecutive days.

At the end of the paper packet with instructions for mental imagery exercises, there will be a survey in which participants will record whether or not they have completed the exercises. They will be instructed to fill out this form each day even if they have not done the exercise. Investigators will assess how many days participants complete the exercises.

Maximal voluntary isometric contractions (MVICs) of the knee extensors will be conducted while the participant is seated in a Biodex Dynamometer and secured with waist and trunk straps. This will involve the participant kicking as hard as they can over 2-5 seconds. Participants will be verbally encouraged to achieve maximal force, and they will be able to see a monitor with visual instruction. Participants will be provided at least 60 seconds of rest between trials, and 5 trials will be performed. If the fifth trial produces a force more than 5% greater than any other trial, additional trials may be performed.

Participants will be asked to complete the Ten Meter Walk Test which assesses self-selected and fast walking speed over the middle 6 meters of a 10-meter distance. They will walk at their self-selected and fast walking speed 3 times each over the 10-meter distance, and average speeds will be calculated.