Treadmill having walking board assembly with low friction resistance and high lubrication

A treadmill comprising:

• a walking board assembly;
• and
• a walking belt encircling the walking board assembly;
• wherein:
• the walking board assembly includes a support plate, a wear-resistant plate mounted on the support plate, and a wax layer mounted on the wear-resistant plate;
• the support plate is made of a composite wooden board;
• the wear-resistant plate is made of wear-resistant material;
• the wear-resistant plate is hard and has a low friction coefficient;
• the wear-resistant plate has a bottom face abutting a top face of the support plate;
• the wear-resistant plate has a top face integrally formed with multiple grooves;
• each of the grooves has a depth of 0.01 mm to 0.2 mm;
• the wear-resistant plate has a thickness less than that of the support plate;
• the wax layer is coated on and filled with the grooves of the wear-resistant plate;
• and
• the wax layer has a coating height at least equal to the depth of each of the grooves.