My goals are different but my reasons might not be. I'm looking to gain weight.

I've always hovered around 190-200lbs @ 6'4, ever since high school.

I've never had excess fat at any point in my life, so that's never been a concern.

I've always wanted to be bigger though. Bigger, stronger, faster etc.

About a year ago I made a few unwise choices. Fell into a rut, wasn't as active as I used to be, stopped hitting up the gym, drank way too much etc. I've been working hard to turn things around.

One of my goals has been to get in the best shape of my life. Biking plays into this by giving me a fun way to work on my cardio. Also helps keep my legs in check, but to be honest a day in the saddle is cake compared to squat day.

I guess my motivation is mainly a desire to end the days of wishing I was something I'm not. I'm done with that. I'm going to be exactly what I want to be, no excuses. I'm going to have the exact body I want, the conditioning I want, the appearance I want etc.

I don't have anything in mind I'm training for. I just want to be in top level condition in every respect because that's who I want to be. I can't stand the idea of being fat, having **** cardio, not being able to squat or bench hundreds of pounds, not being able to do more than a few pull-ups, not being able to run around a block without gasping for air etc. I never want things like that in my day to day life to challenge me again, as long as I can keep it that way.

Like another poster mentioned, it helps mentally too. I feel better at the end of the day commuting by bike vs car. I feel better after a hard session in the gym. I feel better spending my day off outside rather than inside.