I mountain bike a LOT. lol, every day for like 7-8 miles, unless it's a weekend. Then I bike 4 miles to the hills, run my 8 miles loop, then bike back him 4 miles. You feel like shit after it, but you also feel amazing because of how much it'll pay off. Biking and swimming were/are my 2 physical activities...
I was an all state swimmer thru high school till my accident (cick link on first teg)
once my surgery was over, that's when I picked up biking because I couldn't go as fast swimming anymore... It's honestly heart breaking when your junior year of high school you have scouts watching you, ready to ask you to come to their school on a nice scholarship, but you fuck it before your senior year and they just watch and shake their heads....
Whatever. I've learned my lesson, started swimming again, accepted I can't be as fast as I once was, and now bike a fuck ton. lol. honestly, it's the most weight I've ever lost while biking for like 2 or 3 months. I lost a solid 40-50 pounds... (used to be a chunk. haha)