Pronation is the gentle roll of a foot inward after making contact and it is normal and necessary for a foot to evenly absorb the impact of striking the ground.
脚内翻是脚触地后的稍微内翻，以均匀吸收触地后的冲力，这是一个正常而必要的的动作。
2
If it shows the entire sole of our foot with little to no curve on the inside, it means you have low arches or flat feet and tend toward over-pronation (your feet roll inward).