The quadriceps (or quads) are the four muscles located on the front of your thigh and they contract together to help flex (or lift up) the hip and extend (or straighten) the knee.
To strengthen your quads, it is important that squats and lunges be part of a workout program, but be careful not to overdue it. While your quads can take the work, your knees are not as resilient.
With that in mind, here are four exercises that will help pump up your quads while not overtaxing your knees.
Lunges
Lunges are a quintessential exercise that can be done anywhere and can produce quick results. It’s important, however, to perform the lunges properly so you don’t put unwanted strain on your joints.
Keep your upper body straight, your shoulders back and relaxed, and your chin up. (You can pick a point to stare at in front of you so you don’t keep looking down.)
Step forward with one leg, lowering your hips until both knees are bent at about a 90-degree angle. Make sure your front knee is directly above your ankle and your back knee doesn’t touch the floor. Keep the weight in your heels as you push back up to the starting position. (shape.com)
Reverse Sled Pull
While light sled drags are more of a conditioning tool than a muscle builder, heavy sled drags can build muscle, and lots of it.
For reverse sled drags, attach a belt to one end of the sled and some straps to the other end. Start by walking down with the belt. Once you reach the end, turn around and walk back while holding the straps.
Both of these movements fall in the 30-45 second time under tension range, which is generally considered the ideal range for hypertrophy. (Testosterone Nation)
Goblet Squat
Hold a dumbbell vertically next to your chest, with both hands cupping the dumbbell head. (Imagine that it’s a heavy goblet.) Brace your abs, and lower your body as far as you can by pushing your hips back and bending your knees. Pause, then push yourself back to the starting position. (Women’s Health)
Side Lunges
Side lunges are designed to target your quads, hips and buttocks, according to the National Academy of Sports Medicine. Side lunges can also alleviate pain that would be felt with a knee injury during a normal lunge.
Stand with your legs wide and your feet facing forward. Keeping your back straight, lunge to one side. Your knee should be bent on the side you are lunging, while your other knee is kept straight, and you should feel a stretch in your thigh.
Hold this position for a few seconds. Resume the starting position and complete one set of 10 repetitions for each side. (Livestrong)
Box Squat with Bands
Aim for about 40 percent of the load (measured at max tension) to come from the bands. Depending on how the bands are attached, there may be too much slack in the line. If so, wrap them around whatever you attached them to an extra time or two, shortening the band. (bodybuilding.com)









