Linford
Guest
As Andrew Marr found out to his cost 
http://www.bbc.co.uk/news/uk-22141372
I'm happy to learn from his mistakes, but quite sad that he had to learn them in the first place

Marr explained he had fallen into the "terrible" trap of believing what he read in newspapers, which encouraged people to "take very intensive exercise in short bursts - and that's the way to health".
He went on: "I went onto a rowing machine and gave it everything I had, and had a strange feeling afterwards - a blinding headache, and flashes of light - served out the family meal, went to bed, woke up the next morning lying on the floor unable to move.
"Beware rowing machines, or at least beware being too enthusiastic on rowing machines would be my message to the nation," he said.
http://www.bbc.co.uk/news/uk-22141372
I'm happy to learn from his mistakes, but quite sad that he had to learn them in the first place