David Beckham’s yoga teacher reckons your HIIT routine is bad for you

Turns out, your all-out-workout has a serious downside.  

from
http://www.bodyandsoul.com.au/fitness/training-tips/david-beckhams-yoga-teacher-reckons-your-hiit-routine-is-bad-for-you/news-story/159054d00c3fe1c6caf1aea6ab595bdb