Different walking speeds require different walking time. There are three options: First, walk at a moderate speed of at least 30 to 60 minutes every day (100 steps/minute) and get at least 150 minutes of exercise every week. 2. Walk for 20 to 60 minutes at a fast speed (about 120 steps/minute) every day, not less than 75 minutes per week. Third, the above two speeds are alternately combined with moderate and high-intensity walking, which can be completed by walking for 30 minutes every day, or the number of exercise steps in a day can be accumulated. But every walk should last at least 10 minutes to achieve the effect of fitness. Walking speed should be determined according to your own situation, step by step, and you can't blindly accelerate.