I have read about him on his web site
http://www.swamiramdev.info/aboutme.htm. He claimes to have studied the follwoing :
Ashtadhyayi , Mahabhashya, Upnishads, and the six systems(Nyaya darshan, mimansa darsahn , vedant darshan, yoga darshan , sankhya darsahn and vaishesik darshan) of Indian Philosophy and vedas.
All these are the holy books of sanatan dharam( which is known as Hindu religion today).
I my self have read Patanjal yoga darshan. Those who do not know who is patanjal, he was a great rishi of ancient time who was a greate philosopher of vedas and he was the one wrote the first book on yoga. todys yoga system is based on his philosophy only.
in my opinion what baba Ramdev is doing is not correct. Yajurveda mantra 7/4 states that yoga philosophy is meant to realize God while discharging or illusion etc. So is the voice of all other three Vedas specially Saamveda.
no Veda say that yoga philosophy is meant to cure the disease or to make good health.
Base of the yoga philosophy is brahmacharya which comes in yam and Niyam. Which are not being followed. Second sutra of Yog shastra of rishis Patanjali says to the total stoppage of Chitta Vritti is called yoga and yoga means Samadhi and Samadhi means realization of God.
If someone is desirous to make his health good by asan and pranayaam then Ravan, Duryodhan, Kans was very healthy without yoga asan. And our ancient wrestlers, sportsmen and present too are having good health without yoga philosophy.
if one say to the public that Yog philosophy will enable you to realize God then no one will take interest. And when someone will say that yoga will finish your illness then everybody will come to learn yoga asan. And most of the people made this pious philosophy who earned the money which is again against the Vedas. The same thing is happening in western world. people have made it a business.
yoga has eight limbs( yam, niyam , asan , pranayam , pratyahar, dharna, dhyan and samadhi). again there are 5 yams(satya , ahinsa , asteya , bramcharya , aprigraha) and these are 5 niyams(showch, santosh, tap, swadhayay, ishwar parnidhan). That is why it is called ashtang yoga.
now these people know if you teach all this no one will be interested in the yoga philosophy. so out of those 8 limbs they have choosen asan and pryanyam. and in dono ko hee yoga kahana shuru kar diya hai. meat eating is not allowed, but these so called yoga teacher know, it is impossible in USA to ask someone to give up meat. so they have started saying you can eat whatever you like. kul milakar asan( which is nothing but physical excersice) ko hee yoga ka naam de diya hai and logo ko loot rahe hain. people think that yoga gives peace of mind. which is true only if you practice all the things I have mentioned above. aajkal bhagdod ke jamane people have lost there peace of mind and they need some shortcut to bring it back. and is dunia ka yahi dastoor hai....kisi ki bevkoofi ka koi dusra fayda uthata hai....these so called yoga school are making million of money. hamari purani sanskrit and yog vidya ka sahara lekar. But that is wrong.
and if mixing the bone help a patient there is nothing wrong in it.
lekin ye baba pahale se hee culture ka sahara lekar public ko ullu bana raha hai. Log usko Doctor samajh kar nahi jate hain...log uske pas shradha se jate hain....he has misused the public emotions....even if he does anything wrong now, no one will beleive. aise log achche nahi hote hain....If he is a doctor he has to act like a doctor and not like a super human.