So I have been commuting on my mountain bike (2005 giant boulder) for 3 almost 4 years now. It is a heavy bike but also feels like a tank compared to the track bike I own.
I always ride standing up on it even when I have heavy bookbag and back rack full of things. I also rarely shift from the rear end low 13 teeth cog and the 48 teeth chainring because constantly shifting is annoying. Until today, I never considered the possible long term issues that could arise from a constant standing position. I just got a job where I will need to bike everyday approximately five miles back and forth.
Might anyone have past experiences with long term biking issues or suggestions for making adjustments? I can't imagine I'll shift into higher gears or stop standing, but if anyone wants to inform me I would appreciate the information!