i read these on a website and also heard it in one of the lectures by Dr. Zakir Naik, if in any way the below information is incorrect i apologize , i only meant to spread the truth, Allah help and bless us all! ameen!
There are several medical benefits of Salat (Namaz):- of offering Salah and as every Muslim knows that the best part of Salah is the sujood, that is the prostration.
No wonder the Quran has mentioned the word sujood, prostration no less then 90 times in the glorious Quran.
Where [do] you do sujood in the Salah? Normally when you [stand] erect, blood does flow into the brain but it is not sufficient for a healthy brain. During Salah when you [go into] sujood extra blood flows into the brain, which is very important for [a] healthy brain. When you do sujood, this extra blood supply to the skin on the face [helps] prevent diseases such as chilblain etc.
When you do sujood there is drainage of sinuses and there are fewer chances that a person will have sinusitis, that is inflammation of the sinus, this drainage of module sinus, of the frontal sinus, and a person has less chances of having inflammation of the sinus, that is sinusitis.
There are various benefits. [For example], when a person does sujood even the bronchitis's, the secretion of the bronchitis, they get drained, there are less chances of having bronchitis.
When a person breathes normally only two thirds of the capacity of the lung is exhaled out, the remaining one third remain in the lung as a residual air, now when you do sujood the abdominal visra, they press against the diaphragm and the diaphragm presses against the lower part of the lungs, the lower lobes, and when you breath during sujood even this one third residual air is aired out and that's very important for a healthy lung. There are less chances of having diseases of the lungs.
When you do sujood, there is increased venes return there is less chance of having hernia, etc. Due to posture in sujood there is less chances of having hemorrhoid that is piles.
In a salah we stand up and we sit down, do qayam, rukuh, sujood and when we stand up from same position the weight is localized on the bottom of the feet and the calve muscle and the thigh muscle are activated and they increase the blood supply to the lower part of the body, which is very important. Further we do various postures like standing erect, bowing down, prostrating, the vertebra column takes various postures and there are less chances of having disease of the vertebrae, of the spine.