Increase in muscle mass, ie muscle cell hypertrophy, is achieved through training with a load not exceeding 85% of maximum. Large muscle groups such as pectoralis, latissimus, and quadriceps are trained in 4 batches per workout, but the number of batches per muscle group should not exceed 12. For smaller muscle groups such as biceps and triceps it is enough to make 3 series. Exercises are performed at a slow pace to maximize muscle contraction and extend the amount of time the muscle spends under load.
Opportunistic infections are infections that occur more frequently and are more severe in people with weakened immune systems, including people with HIV.