Hi Dave, I’m not a big fan of rowing machines. They’re good to use a little bit, but they only work the pulling muscles and none of the pushing muscles, a little bit for your legs, but not much at all. Some riders, including McGrath would not use them because they caused arm pump for them. But I do have some videos about using bike trainers. And a lot of cardio and strength vids for motocross, of course. You can find them all in this supplement training category.