The main exercise for building the muscles of the legs, and not only for the legs, but also the whole body is squats! This basic heavy powerful exercise involves many large muscles of our body. With this exercise cannot be compared to any other in terms of increasing strength and muscle mass. However, squats with a barbell-not the most useful exercise for the knee joint. Too much weight, improper technique of exercise, poor quality warm-up, jerks and much more can lead to inflammation, pain of the knee joints. So, as I said, you need to carefully warm up: do a run of 5-10 minutes, perhaps to pre-fatigue (more on this later) and then start doing squats. And note, the way you need them to perform, you first need to poprisedat with a body weight of 20-30 reps (or with a blank fretboard), to throw after 2 damn 10-20 kg (will be released either 40 or 60 kg) that depends on what your working weight. So I changed, and did about 15-20 reps. (It was a warm-up.) Next, put the weight and do 8-12