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"Is it good to change up cardio machines?"

Dr. Derek Alessi answers viewer questions.

http://www.wgrz.com/video/1886129626001/1/Is-it-good-to-change-up-cardio-machines http://bcdownload.gannett.edgesuite.net/wgrz/34300055001/34300055001_1886247830001_th-507304742953b0e47cc89ec9-1592194036001.jpg?pubId=34300055001 "Is it good to change up cardio machines?" Dr. Derek Alessi answers viewer questions. yzoneHealthyouaskedWGRZ 01:01

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