BBC has a section called BBC Health. That sections has a part about Healthy living which among other things covers Fitness. I like and agree with their introduction:

Maintaining a ‘keep fit’ lifestyle doesn’t have to mean slogging it out in a sweaty gym. Just boosting your levels of general daily activity will reap big rewards in improved health and energy.

There is also a section about Nutrition with this introduction:

You are what you eat
A good diet is central to overall good health, but which are the best foods to include in your meals, and which ones are best avoided? This section looks at the facts, to help you make realistic, informed choices.