Exercises That Can be Done at Home: Leg Lifts
Step1
One of the easiest ways for beginners to strengthen their quadriceps is to begin by sitting on the edge of a chair. Make sure that nothing is in front of you. With your legs at a 90-degree angle, touching the floor, slowly lift one leg at a time until you have lifted it so that it's completely straight.
Step2
You'll feel your thigh muscles (the quadriceps) tighten as you raise your leg so that your knee isn't bent. Use slow, controlled motions for the best results.
Step3
Be sure that you're sitting far enough on the chair that it won't tip over while you do these exercises. If you're too close to the edge of the chair, it may tip and you could fall off the chair and risk hurting yourself. If you're too far back in your chair, you'll have a more difficult time doing these exercises.
Exercises that Can be Done at Home: Squats
Step1
The squat is a simple exercise that anyone can do to help strengthen their quadriceps. Stand up and place your feet about 2 to 3 feet apart.
Step2
Slowly bend your knees and lower your body to a 90-degree angle from your knees. If you're not able to lower yourself to a 90-degree angle, just go as low as you can without straining your muscles. As your quadriceps get stronger, you'll be able to go a little lower every day until one day you can lower yourself to a 90-degree angle.
Step3
While you're lowering your body, keep your upper body straight--no bending. Your upper body may try to bend forward, from your waist, but do your best to keep your back and waist straight and unbent.
Step4
Beginners often tire after doing as few as 10 squats. If this happens to you, keep going! Know that your body will respond. Try to gradually build your strength until you can comfortably do 15 squats, during three different intervals, three times a week.
Step5
If you don't have a gym membership or can't get to the gym, you can use handweights such as barbells, to make squats more challenging. You can even hold a can of soup, or fill plastic milk jugs and hold their handles for added weight.
Exercises That Can be Done at Home: Lunges
Step1
Lunges are another great way to strengthen the quadriceps. As a bonus, you'll also strengthen your buttocks. Stand up straight. Take a big step forward, moving one foot out from your body while keeping the other foot in place as if you were walking.
Step2
Simultaneously bend both knees until the leg that is in front is lowered to a 90-degree angle from your calf. Your front foot will be firmly placed on the ground, your back heel will lift from the ground. While doing the lunge, keep the rest of your body straight. Then return the outstretched leg back to your body while you return to an upright position.
Step3
Once you are able to do 10 to 15 lunges successfully, you may want to do a walking lunge. This will make the lunges more fun and challenging. Try to build up to doing 15 lunges, three times a day, three days a week for maximum results.
Step4
If you don't have a gym membership or can't get to the gym, you can use handweights such as barbells to make lunges more challenging.
Exercises at the Gym
Step1
When you're at the gym, you can do both squats and lunges, beefing them up to make them even more challenging and effective. Grab a small set of barbells (or freeweights) at a weight level that is comfortable, yet challenging for you, and hold one in each hand. Then do the squat or lunge while holding the weights.
Step2
You can also use a long barbell and attach weight plates to it. After attaching the weight plates, place the barbell behind your head, just above your shoulders. Each arm should be bent at the elbow and stretched up, holding the barbell securely with each hand.
Step3
Gyms typically have pieces of exercise equipment that can help you build strength in your quadriceps. Look for the machines called the "leg press" and the "leg extension." Follow the instructions that are provided by each manufacturer to properly use these pieces of equipment for best results.
Novice 
