I'm also a bit of an exercise nut too. Now that the weather is warm again, I've been riding my bicycle more. There's an awesome nature trail that's about 50 miles long. Yesterday I did 21 miles up and 21 miles back (for 42 miles total. I was pretty pleased about being able to do this. 42 miles on a bike is worth about 2,100 calories.
What's the most intense workout you've ever done? Inquiring minds wanna know!