There is an instrument tutorial on keep. Keep has equipment tutorials for elliptical machines, treadmills and spinning bikes. Treadmill is one of the most common equipment for aerobic exercise and the best choice for family fitness equipment. Elliptical machine is a cardio-pulmonary exercise training tool, which can effectively reduce fat and is suitable for people with poor knees and ankles. Spinning bike can effectively help the body burn calories, with high safety and good leg shaping effect.