I'm more comfortable weight lifting in pants than in shorts, but find they inhibit proper knee position when squatting. Are there any types of pants or material that will stretch well enough to be okay for squatting? What are good pants for lifting weights?
Sweatpants, running tights (loose or tight fit), etc.
That said, a pair of military cargo pants/BDUs have always been baggy enough for me and haven't ever inhibited range of motion.
Plus when ninjas come they can't see your legs.
For squats and deadlifts I wear anything that will stretch: sweats, track suit pants, etc. Whatever I wear I prefer that it's loose.
I'll wear basketball shorts if they have a lot of stretch built-in, but when deadlifting with shorts my shins take a beating.