How much exercise is needed for weight loss?
Fox News posted a good article yesterday called "How Much Exercise Sparks Weight Loss?"
Here's a quote near the end:
To maximize weight loss and minimize weight regain, it appears that overweight individuals should supplement dietary changes with approximately 300 minutes of exercise each week, which is twice the amount recommended for health in the general public.
300 minutes is 5 hours a week, which I must say is more exercise than I've done during most my weight loss, so don't feel discouraged if you're doing less than that. (But try to increase! :)

