The effect of climbing machine on improving heart rate is much greater than that of treadmill. You don't have to raise your resistance, but the exercise intensity has exceeded the medium intensity. The heartbeat will be very fast, so although a lot of calories are consumed, most of them are sugar, and there is not much fat that can be burned effectively. The same similar instrument is the elliptical machine, which also increases the heart rate very quickly, so once the intensity is not well controlled, it will affect the fat-reducing effect.
Treadmill is easier to control the intensity, and compared with real running, treadmill reduces most of the back pedal force, which is equivalent to reducing the intensity of real running, making it easier for people to adhere to and control their heart rate.
Jogging at a speed of 7-8 is the best way to lose weight. The faster you lose weight, the worse.