"I have acquired an ectopic heart beat through excessive exercise which proves I have been pushing myself too much. It's known as a Wandering Pacemaker commonly seen in athletes... it's really annoying! It is nothing to worry about, it just means I have to chill out a bit."

The drummer urged his fans to sponsor him for the London Marathon on April 21, which is the world's largest marathon with nearly 37,000 people crossing the finishing line in 2012.