I am just getting into cycling for sport. I have a BMX bike (the one in my profile picture) and im wondering how my workout compares to a regular street bike with gears. I ride 50+ miles a week purely for the exersize but i do not do any tricks on my bike, its just for cycling right now. I am standing up the entire time because the bike is so small and because it is one gear I have to work much harder. Im wondering if it might be a better workout for my whole body because i am standing. i just dont really feel like spending money on another bike right now and i wanna know if my bike will work for strictly street cycling