Screen Shot: YouTube (Casper Sanderson).

Remember when you were young? Remember when your bones didn't ache like they did this morning, and every morning since last Wednesday? Remember playing squash last Tuesday evening? Remember how much that made you ache? You're still aching now.

But, believe it or not, you were young once. It might not feel like it at the minute, it might seem like a trick of the mind, but once upon a time you wouldn't think twice about runningĀ up a hill with some of your mates...and pushing a giant tyre back down it.

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