Well, a lot of interesting/good information has been presented in this thread.
However, when I hear these percentage figures used, it really makes me wonder if we're really comparing similiar items. For instance, the knee bend, in itself, probably doesn't contribute much in the power department and I too would agree for many it probably is a negative. However, the use of the legs is, in my opinion, not only is a key factor in the balance of the server but plays a major role in the fluid action of the service motion itself.
Sure, many of us can serve from our knees, a chair, sitting on the court, etc. but I'm not sure it proves much other than the necessity of hitting up. Even if one is kneeling, your using your legs at least the upper part. Although it might be possible, I wonder if someone can hit serves over 100mph sitting on the court which would be using no legs at all. Maybe it can be done but I know I couldn't do it.
I think it impossible NOT to use the legs if your serving standing up - everything is connected in such a manner that its difficult to seperate the hips from the legs, the hips from the shoulders, etc.
Incidently, what references/studies are we talking about here that break down these elements into percentages? Might be interesting to take a look at them.
However, when I hear these percentage figures used, it really makes me wonder if we're really comparing similiar items. For instance, the knee bend, in itself, probably doesn't contribute much in the power department and I too would agree for many it probably is a negative. However, the use of the legs is, in my opinion, not only is a key factor in the balance of the server but plays a major role in the fluid action of the service motion itself.
Sure, many of us can serve from our knees, a chair, sitting on the court, etc. but I'm not sure it proves much other than the necessity of hitting up. Even if one is kneeling, your using your legs at least the upper part. Although it might be possible, I wonder if someone can hit serves over 100mph sitting on the court which would be using no legs at all. Maybe it can be done but I know I couldn't do it.
I think it impossible NOT to use the legs if your serving standing up - everything is connected in such a manner that its difficult to seperate the hips from the legs, the hips from the shoulders, etc.
Incidently, what references/studies are we talking about here that break down these elements into percentages? Might be interesting to take a look at them.