How to strengthen my legs quickly?

First of all, let's give you some good news. You can see small results in even two to four weeks after you begin a leg workout. You will have better stamina, and your legs will look a little more defined. But all in all, depending on your fitness level. Squatting will not only help you develop leg, calve, and hip strength. But also promote full-body mobility and stability. If you are looking to build muscle, burn fat, and get strong, adding squats to your weekly program is a must. Next up is the Barbell/Kettlebell Lunge. Combining running and walking with strength training and other forms of aerobic exercise like swimming, elliptical training, and cycling can add variety to your workout and can greatly improve your performance. Sports like soccer and basketball are great for improving leg power as well.