Accessory for manually-operated exercise equipment, namely, accessory attachment to increase muscle resistance; Aerobic steps; Baby swings; Badminton sets; Basketballs; Body-building apparatus; Body-training apparatus; Checkers games; Checkers pieces; Chess games; Chess pieces; Chess sets; Chest expanders; Chinese checkers as games; Electrical stimulation belts for strengthening abdominal muscles; Exercise equipment namely, rowing machines; Exercise equipment, namely, abdominal boards; Exerci...