What is better/more effective: full squat or regular squat (legs to 90 degrees)?!
Question: We're talking barbell back squat here.
Answers: We're talking barbell back squat here.
Definitlely go with the 90 degree squat. When you go past 90 you put a huge strain on your knees and wind up doing a lot of damage.
Full squats are good for flexibility without weights.