Metabolism or Hard Work?

I've been a toothpick for my whole life. I don't really have a way around it, I've tried. There's the lifting + protein plan. Yeah I tried that, not my thing. It didn't work anyway. Then there's the eat everything and get fat plan. Yeah.... that doesn't work. However, I am leaving one part out. I've been a runner for 10 years. I don't compete anymore like I did in college, but I still run 5 miles a day to stay in shape. I also fell in love with rock climbing a little over 2 years ago. I climb twice a week after work and usually again over the weekend. I'm also giving yoga a fair amount of time. So what I'm trying to say is yeah, I'm a skinny guy. At the same time though, I lead a crazy active lifestyle and I'm not going to stop. Even with graduating and starting my first REAL job I've managed to find time and balance for all the things I love. So to all you folks out there that love to tell me "oh you're still young, enjoy it while it lasts," I'll send you guys a postcard of my six pack when I'm 50 years old, running 5k's, climbing 1,000ft mountains and shredding powder on the slopes.