"Because I am 41"<br><br>That hit me like a tonne of bricks.,(reply>), @Noa Binnendijk Yet it's also largely true. Someone who's physically active all their life can likely do far more at old age than someone who was couch potato for 40 years. Doing smart decisions improves your lifespan and quality of it, on average.,(reply>), So will the water,(reply>), Healthy living. Take care of your body and it will take care of you.,(reply>), @Alexander Roderick don't worry, this is a common misconception, that if you do everything right you'll be fully able for most of your life. I'm 19 and get sore walking downstairs. It has nothing to do with how you spend your life.,(reply>), @dvrk I used to be an athlete like you, then I took a crippling blow to the knee. And now every bit of movement hurts. :D