Treadmill; 60 to 90 minutes of aerobic exercise every day can burn fat and prevent rebound. Running consumes more calories than walking, but it has a greater impact on joints. But it has an advantage in heat consumption.

Elliptical machine: It can make users do a lot of exercise for a long time and hardly affect the joints of lower limbs. The damage to joints is relatively small. You can practice speed change and resistance change on the elliptical machine. The burning heat is average.

Treadmill: Treadmill can increase the strength of lower limb muscles while losing weight. But don't grab the handrail with your hands. You should stand up straight and walk up and down more. Burning heat is average, which puts great pressure on muscles.

Exercise bike: Because it is done by thigh muscles alone, it is more difficult, but it consumes more calories. The burning heat is average.

Rowing machine: Rowing machine can exercise the muscles of the whole body and has little effect on the body. The correct posture is to rely on the strength of your feet to push your body back. When your hand is close to your knee joint, your upper arm pulls hard, bending your elbow and pulling towards your chest. Keep your back straight when pulling back, and fully stretch your knees, hips, shoulders and hips. The burning heat is average.

I hope my answer can help you.