[amorphic]

If you're not already, look into doing a couple of resistance training sessions per week. You don't have to be He-man lifting huge weights, in fact you're better not to be. Focus on core and "all of body" movements.

You'll not only feel stronger and look healthier, you'll also burn a lot of energy. And as you get older, maintaing strength and flexibility guards against aches, pains and injury.

[coffeeaddicted]

I'm currently using variations of the 7-minute workout (7-min.com) + some minor weight lifting.

[lectrick]

Any amount helps, but cardio benefits only start to kick in at 20 minutes or above, as I understand it, from the research.