Ive tried doing two 25 (2.75 mile on treadmill) min cardio sessions a day but its getting difficult to do. I am considering doing two 20 min concept 2 rowing ergometer sessions alternating in with the running to prevent leg pain. Do you guys have any opinions on this machine? It feels like a more intense workout than running. Anyone else use these machines alot?










benefit) LOL but yeah it seems like a badass workout. Thanks for the tip I'm reading the crossfit damper pdf now.