CNN Sanjay Gupta MD February 8, 2014 21:58:00
From them watching their transformation. five things you should never do when it comes to your workout. i come to meet b.j. >> nice to meet you. >> you are going to teach me to do it right? >> yes, sir. >> elliptical. >> it's nice to get warm and sweaty. itis not going to train your body. it won't make you more athletic and there's a lot of repetitive hyperextension of the knee. >> this is a popular machine, the crunch machine to do abs. people want to hit the abs. you flex and crunch. you are loading yourself in a spinal flexion. this movement is going to cause herniates disks and bulging dis...
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