I'm looking to build my quadriceps primarily to improve my weightlifting (also because I just want big ol' legs) and was wondering what exercises everyone here had found particularly effective (or particularly ineffective, for that matter). Obviously squats (particularly front squats) are the numero uno* but I don't have regular access to a squat rack (I do have kettlebells from 16kg to 40kg, a barbell with 100kg of plates and some floor) so it'd be nice to find some supplementary exercises I can fit in outside of my gym sessions. To get the ball rolling, I did find that regular sprints up stairs worked wonders for my quads. It might be worth including more leg power drills to see if that'll spur on some growth. *Leg press and knee extension machines don't count, obviously.