Hey baby boomers, here's some good news for you (or bad news, depending on your perspective): It's never too late to get your butt off the couch and develop a regular fitness routine. But there's a catch -- you have to keep it up for 10 years for it to make a difference in your lifespan. Don't let that put you off, though -- it won't take you long to figure out that it's totally worth it.

If you're well into middle age and thinking of getting fit, don't sign up for a full marathon right off the bat -- it takes time to get into fitness. Start slow with a gentle activity, like:

• Walking. Go a bit faster and further each time, and enjoy the time to yourself.
  
• Swimming. Start with just a few laps and increase that once you feel up to it.
• Yoga. Just remember to go into child's pose when your arms start shaking.
• Wii Fit. Hey -- no one said you had to join a gym to get fit!

Aim for two or three days a week -- and enjoy it!