Riding a bike 15 km every day can definitely exercise, and it has many benefits. Riding a mountain bike can exercise the heart and lungs, improve vital capacity, and play the role of running, losing weight and strengthening the body. If you can, you need to pay attention to the riding posture. You can change the speed flexibly during riding, and you can ride a little more every day step by step. If you persist in this way, you can not only build a perfect figure, but also make your body strong.
Therefore, if you exercise, you can ride a bike every morning, go for a brisk walk or jog at night, and do sit-ups before going to bed.