That answer is C you have to progress in order to get certain fitness levels
Use the settings of the machine to decrease the intensity
George can work out for the same amount of time but with a lower intensity that way his heart rate won't increase
Answer:
exercises, good food, bike riding , hang on with friends , traveling
Answer:
I would do a mountain bike personally, its tougher but If you want to do mountain biking then you're going to need something like that. Mountain bikes have great tires and last a long time. Try Dicks sporting goods or any place like that. But if you want a more comfortable bike then I would look into something that allows you to change the gears of the bike.