If you guys want to use resistance bands at home to work on your Uchi Komi and help your mat fitness, check out a book called "Championship Judo" by Mike Swain. He has a whole photographed section on resistance band excercises for Judo. Mr Swain was a former world Judo Champion too, there is a lot of good information in the book besides the resistance band stuff.
"Let your food be your medicine, and your medicine be your food" Hippocrates.