Exercise

There were a couple of basic concepts I didn't totally understand until I took this hike. "Geological time" and the "earth's crust". And I took geology in college. C'mon, leave your footprints on twelve miles of wild terrain. Burn 1,800 calories.

Even if you exercise vigorously for an hour every day - too much sitting significantly increases your risk of cardiovascular disease, type 2 diabetes, obesity. So when you're in front of your TV or computer, do this - or something like it - for a minute, every hour or two.

If you're not motivated to exercise today, I have a suggestion. Put on some music that you can't not dance to. This is aerobic: you get your heart rate up and sweat. 45 minutes and minus 275 calories (that's a third of my Mexican Lasagna). My current playlist:

Let's go pyramid hopping. In Mexico. Teotihuacan. One of the biggest cities on the planet ... during the 5th century. The Pyramid of the Sun, third biggest pyramid on earth. The Pyramid of the Moon. Smaller but steeper. Four miles, two hours, a thousand calories.

Even if you exercise vigorously for an hour every day - too much sitting significantly increases your risk of cardiovascular disease, type 2 diabetes, obesity. So when you're in front of your TV or computer, do this - or something like it - for a minute, every hour or two.

Great views from the tops. Actually, great views from the bottom, too. In Sienna. And in San Gimignano. Five miles. Three towers. 1,000 stairs. 1,500 calories. And you get to eat in Italy.

Even if you exercise vigorously for an hour every day - too much sitting significantly increases your risk of cardiovascular disease, type 2 diabetes, obesity. So when you're in front of your TV or computer, do this - or something like it - for a minute every hour or two.

Even if you exercise vigorously for an hour every day - too much sitting significantly increases your risk of cardiovascular disease, type 2 diabetes, obesity. So when you're in front of your TV or computer, do this for a minute every hour or two.

It always sounded like such a long way to walk, Jerusalem to Bethlehem. I imagined vast stretches of desert. No roads. No signs. Just the star. No Google Maps to tell them the trek's just seven miles. Nothing to sneeze at, but ... I could do that on Christmas Eve. You, too.n

Even if you exercise vigorously for an hour - five times a week - too much sitting still significantly increases your risk of cardiovascular disease, type 2 diabetes, obesity. So when you're in front of your TV or computer, get up and do this for a minute every hour.