Today science tells us the best sleeping position, medical science tells us that its health to sleep on ur back or on ur right side which we (muslim) were told 1400yrs ago by our belove prophet muhammad (saw).
Sleeping on the right side does not let the weight of stomach & intestine to suppress heart, hence blood circulation is not affected.
By sleeping on the right side, the heart remains in the topside, one will not have a deep sleep. A little noise can prepare some one to face any contingency. It also develop the habit of early morninng rise.
Sitting & rubbing the eyes for a while after awaking adjusts the heartbeat according to the new posture hence it has positive impact on the hearth.
Napping after lunch helps to prevent burden on coronary artery. According to cardiologist, having a nap after lunch produce positive effect on heart.
Imam shafi states that there are 4 types of sleeps: to lie on the back-this is the sleep of the prophets. To sleep on the right side-this is the sleep of the worshippers (us!). To sleep on the left side-this is the sleep of the ruler. To sleep on the stomach-this is the sleep of the devil. [related by Al-BUKARI, Muslim, Al-TRIMIDDI AND ABU-DAWOOD.] Hazrat Aishah report: "the mattress the prophet used to sleep on was made of hide, stuffed with fiber".
Benefit of avoiding soft bed in the light of medical science: Backache is often caused by regular use of soft bed as the mucsle of back are loosened. The pain gets aggravated on continuous use. Extremlly soft and comfortable bed can lead to the inflammation of ureters, hence kidney diseases can be prevented by not using soft bed. The use of soft bed can reduce the gap between the vertebrae. The experts don't recommend it. Infants using soft bed can suffer from deforming of bones, which may lead to disability.
It is sunnah to dust the bed before sleeping [AL-BUKHAARI (6320) & MUSLIM (2714)] NARATED BY ABU HURRAIRAH: the prophet(pbuh) said,"where one of you goes to his bed, let him dust off his bed with the inside of his lower garment for he does not know what came onto it after he left it. Then let him say: BISMIKA RABBEE WADA'TU JANBI WABIKA ARFA'UHU WA IN AMSAKTA NAFSI FARHAM-HAA WA IN ARSALTAHAG FAHFAZHAA BIMAA TUHFAZ BIHI IBAA DIKA AL-SAALIHEEN (IN YOUR NAME, MY LORD, I LIE DOWN, AND IN YOUR NAME I RISE, IF YOU SHOULD TAKE MY SOUL THAN HAVE MERCY ON IT, AND IF YOU SHOULD RETURN MY SOUL THEN PROTECT IT AS YOU PROTECT YOUR RIGHTEOUS SLAVES)".
Its forbidden and not recommended to sleep on stomach; ya'eesh ibn Tihfah al ghifaari reported that his father said: "i stayed as a guest with the messenger of Allah (pbuh) with those of the poor whom he hosted. The messenger of Allah (pbuh) came out in the night to check up on his guest, and saw me lying on my stomach. He prodded me with his foot & said, do not lie in this manner, for it is a way of lying that Allah hate. According to another report, the prophet(pbuh) prodded him with his foot & wooke him up & said. "do not lie like this, for this is how the people of hell lie", (reported bx Ahmad, Al-Fath Al-Rabban 14/244-245; by al trimidih, no.2798' shaakir end:, and by abu dawood, al-sunnan, kitaab al-adab, no.5040, al-da'aas end. Also reported in saheeh al-jaami;2270-2271).
(surah al ahzab ch33;v21 trans.) "there has certainly been for you in the messenger of Allah an exellent pattern for anyone whose hope is in Allah & the last day & (whop) remember Allah often".
-in the present day science tells us that it's best to sleep on the right side or back & not lying on the left side & stomach. Our beloved prophet muhammad (pbuh) was aware of this back in his time. Beyound doubth he is the best example for us all to follow for all time.
There is no other best gift in this world then for you to be a Muslim. Why will you not praise or thanks Him the Almighty.