C- they are just as effective as making your own protein shake at home
It’s important because your heart must beat faster during exercising because the increase of the heart rate also will need a increase of cardiac output to deliver the necessary blood flow to the muscles.
Hope this help
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.
Walking, running, any exercise that increases heart rate