Any of you guys and gals out there looking to build your cardio endurance I had some good advice a while back from someone and I have been using it ever since and wanted to pass it along to the rest of you.

This is actually legal, easy to get and I have used it when I ran the tough mudder

-Beetroot juice, 500ml and gargle each mouthful then swallow, don't clean out your mouth or drink anything else for an hour after.

-Effects last 24 hours, it drops your blood pressure and increases oxygen carrying capacity of blood.

-Get pure juice not the stuff that they mix with apple juice etc.

-Starts working after 3-4 hours, prepare to be amazed it's like EPO but legal.

Also remember if you use Anavar that is good for cardio however if you are on test and deca not so much haha