Each subject completed the 12 exercises in a random order that was assigned to subjects employing Matlab software (Version 7.0, Mathworks Inc, Natick, MA, USA). Each exercise was performed for a duration of 20 s with a 2 min rest interval between exercises. Except for the Exercise Ball activities, all exercises were completed with 1408 knee flexion (1808 represents the straight knee position with the femur and tibia bones aligned) and 608 hip flexion (08 represents an erect posture with the femur extended). Exercise Ball activities were completed in a seated posture with 908 knee flexion and 208 hip flexion. A stainless steel goniometer (Baseline, White Plains, USA) was used to ensure the proper knee and hip degree before positioning the Laser.