Alternative way to loop underspin

Everyone else has to bend and twist from the waist because the foot is not in line with the torso. This is in fact, the only way where you can go down really low while maintaining a straight torso. The key is the right foot and knee positioning.

Lol the videos don't lie. Also Ma Long is in a training situation so you cant argue that he is not using perfect technique. And they use pretty much the same mechanism in matches. Ma Long and Xu Xin don't rotate their feet sufficient to get to the split squat position and hence they can't go that low without waist bending. You can see the waist bending really clearly in their matches and practice videos. 

Not really talking about match effectiveness (I think both are effective in looping underspin) in this thread, also match results are a test of overall ability not just proficiency at a particular shot...

It looks similar but the devil is in the details. With both methods you can  get to a low position, the question is how you get there. You can see very clearly how Ma Long's right waist is compressed, indicating a significant waist bend. Same with Xu Xin except it is hidden from view. 

With Harimoto's method which is akin to a split squat, you can in fact get much lower without any bending in the waist (in this position the left knee can touch the ground easily) because your knees are aligned with your torso in a straight line, ie the feet is rotated 90 deg to the table, same with the knee and the waist. Whereas with Ma Long and Xu Xin, their feet is rotated only about 60 degrees while their torso is rotated 90 degrees, with this difference you can't go so low, and because your centre of gravity is not in line with the knees there will be some degree of knee shear too. 

The other part of the equation to achieving this "split squat" position is a small angle difference between the left and right foot (the larger the angle the less low you can go without waist bending). 

. That means even the left foot has to rotate with the right foot during both the backswing and the stroke. 

This in fact is a good illustration of my point. LGY rotates his feet more than Ma Long/Xu Xin and therefore can get to a lower position.But still it is incomplete. It is a continuous spectrum...the more you rotate your feet and the lower the angle between your two feet, the lower you can get to the ground without bending waist. Of course ideally everything is in line, then you can loop underspin without the potentially harmful waist bending. 

Blahness, your very theoretical approach to TT oftentimes doesn't really work, nor is as necessary as you think, outside of highly controlled settings.

For all of the revelations you've shared in the last year or so, do you have measurable improvement in your matchplay by implementing these theories?

Ok...Mr know it all, you win! 

A picture of Gatien in the 1980s would look similar.

Neither do I have a clue what does 2000 level in US mean....

Another good test of your theories would be to implement them on people who have stopped improving despite playing a lot, and seeing what happened. I’d be curious to see the results. 

Are you referring to having both feet pointing in the same direction (to the side) like the split squat image you linked above?

I think it'll be really hard to transfer your weight forward into your opposite playing foot if you had them both pointing in the same direction like that. If you did manage to do it, your non-playing leg foot will probably have to rotate to be facing forward during the stroke. Harimoto still has his left foot facing diagonally forward. Xu Xin has it (his right) facing a little more forward, and we can't see Ma Long's feet in the third picture.

I think your playing foot should be pointing sideways like the split squat, which Harimoto and Xu Xin both have in the pictures above. But your non-playing foot should be pointed more forward. And you should be folding your body over your leg (like a bow, though I think for injury prevention you're advocating not to lean as well as bow here?) to transfer all your weight to that side.

I could be missing it, though! There are slight differences, but I see the same key ingredients in all their strokes.

Getting low would also be influenced by the height and length of the incoming ball, the timing you're planning to hit it, your current position, and the type of ball you're going to play.

I'm thinking the underlying principle I'm seeing from this thread is to get low. Having a wider stance also makes getting lower easier (which the split squat definitely has). Your success could be attributed to getting lower than you usually do. I used to try and get super low, but I was never able to commit it to muscle memory!

If it all was the same than before, maybe zjk would not have interrupted his career because aggravated (scrotum?) injury. What about Maze? and all those we don't know who broke themselves through injury inducing technique?

About the OP being a repeat: it is not true and it is hypocritical to say. Even if his approach was a repeat, which it is not, that would mean people can't approach a known topic topic with their own twist?

Carl Sagan made wonderful space tv shows. So we could not do it again? it happens all the time in all domains. How about no more books about the French revolution because there are plenty already?

Well done blahness! feel complimented. Note that I do not see any wrong in people trying to tone you down, but when you see they don't attack or fight what you say but just the fact that you want to own your own twist, which you do, you can welcome it as pat in the back from your buddies which they are :).

Thanks for your mini series about injury prevention technique at the service of a sustainable and dominant game.

Encouragements!