Indoor fitness equipment is generally divided into aerobic equipment and strength equipment. Aerobic equipment includes treadmills, magnetically controlled vehicles, spinning bikes, elliptical machines, mountain climbers, etc. Strength equipment includes dumbbells, Smith machines, kick trainers, horizontal weightlifting beds, butterfly machines, and various comprehensive trainers. Aerobic equipment mainly exercises cardiopulmonary function and physical endurance. General fitness exercise is mainly aerobic equipment, and strength equipment exercises muscle explosive force.