ADJUSTABLE TENSION FOR CUSTOMIZED WORKOUT: Easily adjust the tension level with the tension knob for a personalized exercise experience. Great low impact exercise for beginners and perfect for rehabilitation following a surgery or injury. GREAT FOR TONING MUSCLES AND IMPROVING CONCENTRATION: Folding pedal exerciser can be used to strengthen arms and legs, effectively increasing circulation while improving stamina and relieving tension for greater focus and concentration. NON slip:nonmarking feet ensure the pedal exerciser stays in place on any surface, including any tabletop, carpet or hard floor surfaces. Each pedal also has a nonslip surface with adjustable toe loops for added comfort and safety.