The characteristic of his movement is to slightly straighten
the upper body, but the movement of the feet is important.
Looking at the photos of his backhand topspin close to the table, taken from the side (B-1 to B-4),
and having an eye to his left foot, we notice he moves his racket,
transferring his weight to his toes; his heel does not touch the ground (photos B-3 to B-4).
Thus, making the use of momentum created by pushing from the ground
by his dominant left big toe (right big toe for right-handed players),
the upper body straightens spontaneously and makes the racket move smoothly.
In addition, making the use of the momentum created by pushing from the floor
with the leg, it makes it easier to have the right timing for stroke.
We tend to try to move the arm quickly when you think of
“stroking the backhand topspin close to the table,” but the movement only
with the arm cannot gain enough stability or power and it is also difficult
to contact at the right timing point. Lin Gaoyuan’s backhand topspin is highly precise
because he moves the racket in harmony with his whole body.