At the bottom is a mechanical lever. Just gently push the pedal upward, pull out the bolt and slowly put it down.
Extended data:
Treadmill is a routine fitness equipment in family and gym, the simplest one in today's family fitness equipment, and the best choice for family fitness equipment. 1965, the world's first household treadmill was born in Tantelli, northern Europe, and the designer modified it according to the principle of speed transmission belt. The birth of this treadmill represents a real home treadmill in the modern sense, and people in Europe and the United States began to accept running at home.
References:
Sogou encyclopedia-treadmill