[QUOTE]Originally posted by Lokkan-Do:
From what I can see the ground fighting in Judo is simular to other grappling MAs. Except it doesn't do much no GI sparring.
So why does Judo require more strength?[/QUOTE]
Assuming that you are talking about BJJ, the ground fighting is similar, but the standing work of Judo is far more extensive.
Now that said strength is certainly one possible advantage assuming that all other things are equal.
Competition training assumes that you will face a person of a similar skill level to your own. As a result an advantage such as being stronger is a big deal.
Now if your focus is purely Self-Defense, or better yet basic personal training, then don't worry about the strength issue. As with most martial arts applying techniques against the untrained is much easier since they don't know how to block.
As for me I fought in the Open division for a lot of years, and though I generally weighed just under 210 lbs, and often fought guys well over 250 lbs, I won far more matches than I lost. In short strength is helpful, but not what truly important.
I hope this helps. Good Luck.
-Russ (The Judo Guy)
The JudoGi Store
www.judogis.com