I have been making great progress with the 5x5 overthe last year or so but am now trying to up my cardiovascualr fitness. I have been biking for 45 minutes on the off days but recently started to run a few miles because I think there will be some running involved at the academy. My problem is as soon as i start to run my lower back blows up and aches horribly. so much so that after a mile i need to stop even though my legs and lungs are still strong. Should I just stretch it out alot and hopefully i will get used to it over time?
thanks,
Migity
thanks,
Migity
