There are a variety of exercises to increase the hardness of the male penis erection, such as compression method can be in a weak state, or semi-erect state, repeatedly and persistently with the hand on the penis moderate pressure. This can enhance the vitality of the nerves and blood vessels of the penis and promote the filling of the cavernous body of the penis to help erection. You can also use the shower method, using the shower nozzle to shower the appropriate temperature of warm water to the front of the penis and around the root tissue, using the principle of heat expansion and cold contraction, and you can massage the penis, also by increasing the filling of the penile corpus cavernosum to increase hardness. You can also take the deep squat and anal lift method. The deep squat and anal lift method can exercise the strength of the pelvic floor muscles and ligaments that collaborate with the erection of the penis. And improve the blood circulation in the perineum, which is conducive to increasing the hardness of the penis erection, but this method must be carried out consistently to have a great effect.