This study investigates whether auditory feedback improves the performance of people training squats or kicking movement with a computer game that gives feedback on the user's performance.

During the study participants are wearing sensors that record the movement of their upper and lower leg and the muscle activity of the muscles used to perform squatting and kicking. At the beginning of the measurement participants will be asked to perform 10 squats, 10 half squats, and to hold some positions for a short period. Then participants will be allocated to group 1 or group 2 by a draw.

Group 1: plays the exergame without sound Group 2: plays the exergame with sound

Participants play four rounds of a squatting and four rounds of a kicking game. After playing the game they are again asked to perform 10 squats, 10 half squats, and to hold some positions for a short period. Furthermore, they fill a questionnaire in which they indicate whether they liked the game.

The researchers use the measurements taken prior and after the game to see whether participants improved in kicking and squatting. Furthermore they compare which group scores better in the game to see whether auditory feedback helps to understand the game story.

Inclusion Criteria:

• 18 years or older
• Healthy based on self-report

Exclusion Criteria:

• Pregnancy based on self-report
• Orthopedic problems, musculoskeletal disorder, or prior surgery on the lower extremities based on self-report
• Abuse of drugs, growth hormones, anabolic steroids, or performance enhancing substances based on self-report
• Participants with a known plaster or metal allergy based on self-report
• Not being able to follow the instructions given in Dutch or English
• Not willing to wear shorts/ expose the skin of the legs for any reason