Punching bags and working the wrong muscles....

Tonight's workout was a bit crazy and quick paced. I got to punch the punching bag for a minute, do 10 tricep push ups and then repeat. WHEW! That took a bit out of me and I could really feel the stress melting away! The other part of the work out that was hard though was getting the right rhythm and technique to do so hamstring work out. I seemed to be working my back muscles instead of my glutes and hamies.... I can feel the twinges in my back that confirm I was doing it wrong....