We have a lot of fun in my Fitness Warriors classes, especially when we use resistance bands. They’re a great way to get some additional muscle work in, and a good groan out. On Saturday, April 6th, Petersburg, Virginia, will host hundreds of people in a resistance band workout led by celebrity fitness trainer Don “Donamatrix” Brooks. DONAMATRIX DAY is going to have a lot going on that promises fitness-oriented fun for the whole family. I’m even going to lead a chair workout for seniors, and anyone else who wants to give it a try. But the highlight of the day will be the huge resistance band workout with a…