Strength and conditioning is a fundamental supplement to any athletic activity including judo, jiu-jitsu, and other grappling arts. Check out this article I wrote for www.mixedmartialworld.com on an effective strength training program for the hard-training grappling athlete.
The key to effective programming for grapplers is to realize that the volume of resistance training must be carefully controlled to prevent overtraining. In many ways we undertake a session of resistance work every time we step on the mat. This program hits the fundamentals and keeps the overall volume low.
Brian Jones, PhD