Apparatus for gymnastic exercises; appliances for physical exercise other than for medical use, namely, resistance bands and tubing, pull-up bars, abdominal wheels, stability disks, balls used for exercise and strength that are equipped with sensor platform devices which measure user activity by reference to force or pressure for use with such platform devices; articles for exercising the body other than for medical purposes, namely, resistance bands and tubing, pull-up bars, abdominal wheels...