Physical activity in any form is good be it walking, running or hitting the gym. It depends on your preference - choose what is comfortable to your lifestyle and your body.
Yes. Any exercise is better than no exercise.
I don't think a Fitness course is better than exercising alone. When you exercise alone, it's easier to make up the time and the exercises that works best for you.
Although gardening is a good thing to do, it does not contribute much as an exercise and is not as good for exercise as running. It is better, however, than sitting on a couch watching television.
The more you do sports like running around and all that you can lose weight and its better than doing fitness cause its fun:)
It depends on what you do. Swiming works more muscle groups than running which makes it a better all around exercise. Swimming is also low impact which is better for your joints than running.
It is a test which determines fairly accurately how tough the exercise is for you. In the test you talk while you are doing a physical exercise, like running. Then the people that are performing the test determine your level of fitness by determining how well you can talk. If you can talk whole sentences without having to gasp for air, your fitness level is obviously better than if you have to gasp air between every word you say.
There is a great relationship between food and exercise. The more exercise you get the more food you need to eat.
Not that much. Cycling is softer on the body than running - less impact - so if you're hurting from running, switching to cycling will get you a possibility to maintain your general fitness level. But generally, to get better at running, you need to do more running.
Yes walking is better for you than running
Yes.
According to some survey: Running barefoot causes less collision force to the feet than running in cushioned shoes. Please check this site for more info:http://www.webmd.com/fitness-exercise/news/20100127/barefoot-running-laced-with-health-benefits
It is better than running on pavement for your joints and knees.