One thing that can help is concentrating on feeling the target muscles work while you perform each exercise/rep, as opposed to just moving weight.
Here's a few exercises/techniques that you could try:
-DB Walking Lunges: Keeping your chest upright will put more emphasis on your quads. Use a slow eccentric and feel your quads stretch.
-BB Front Squats: Deep and with heels elevated. You can use 5lb or 10lb plates under your heels to put more stress on your quads.
-BB Back Squats: Feet about shoulder width apart, toes pointed out slightly, and remain as upright as possible throughout the movement. Heels can be elevated here too. Shoes with a slight heel work well.
-Hack Squats: Heels together with toes pointed out (duck stance), pushing off the balls of your feet
-Smith Squats: Medium stance, toes pointed out slightly, and feet out in front of the bar. Placing your feet out in front of the bar path allows you to zero in on the quads.
-Leg Extensions: Keep toes pointed back and slightly out to the side.
-Leg Press: Wide stance with toes pointed out (frog stance). Have your knees come down outside of your body and perform the concentric portion of the movement explosively.
Here's a Tom Platz video (its long) explaining the techniques he uses for BB and hack squats, some of which was mentioned above.
#LAReport2014 Teil 9 - die HAXEN müssen wachsen -Zitat David: #doyouevensquat #rs #sexualhealing