How good is Beetroot for endurance improvements?

Beetroot is being used more and more by endurance athletes but why?

Beetroot is being used more and more by endurance athletes but why?
Put simply this is Physio done via either telephone or video over the internet. Skype and facetime are examples of this.
Contrary to popular belief online physiotherapy can be very effective and it can help the same injuries that face to face physio can help. I have helped many people with injuries such as disc prolapses, tennis elbow, neck pain and much more).