Thank everyone for great comments and feedback! They are really helpful not only for my progress but for my understanding of the game too.
@pingpongpaddy @blahness I think I see the different in my strokes and theirs. I will put it into practice to see how it goes. Thank you for the great instruction videos!
"(people who have to swing hard all the time fall victim to tension and pressure," -> I am one of the victims of swinging hard all the times here, especially when looping agains backspin. It works to some extent against lower level players but my arm gets tired very quickly. Against higher level players, they just block my opening and the ball comes back too fast that I cannot attack and give up all of the initiatives.
This is a video of me practicing loops against backspin today. I tried to loop with different powers. I thought if I am able to hit hard and fast then it should be easy to hit soft and slow. But my error rate seems to be the same or even higher when using 50% of power and slower swing speed. Swinging slow needs different timing, control and needs a lot of practice too, I guess.
I don't know why it feels awkard for me bending my upper body forward during looping. I feel comfortable with body straight up like in the video, sometimes even backward a bit. It is also easier to move back after looping to wait for the opponent's block or counter.
"The second way is to hit through the ball and up, so you will generate spin by engaging the sponge" -> I tried to hit through the ball more in the last 15 seconds (loop kill ) but I felt the margin of error is too small since the ball doesn't have much clearance over the net. Is it because of my wrong technique or those balls are too low for that kind of shot?
Hey, Phil, have you ever cracked a whip before? Or hammered a nail?