that's why channing muller is once again lacing up her sneakers, after six months of cardiac rehab. she was ready to hit the streets again. >> straight out from the beginning, i was like, i want to run again. i want to be able to run. my body may have let me down before, but we will come back from t. >> reporter: doreen gentzler, news4. >> this study no excuse to become a couch potato. being sedentary is a huge risk factor for heart disease. the cdc recommends we all get at least 150 minutes of moderate intensity exercise every week. but if you're planning on training for an ultramarathon, talk to your doctor around get plenty of rest between runs. >>> a maryland woman who was bitten by a snake now has another issue to worry become the bill. jewels weiss was taking a picture along the george washington parkway in virginia when she felt a sting. she thought she had been stung by a bee but discovered she was actually bitten by a copper head. she went to the er at suburban hospital where she got three doses of anti-venom over 18 hours. then the real shock happened. she got the bill in