Thanks for your replies.
Well, I only rode the horse for a day. Just trotted around for some time.. thats it. Since it was in a ring.. I was almost falling off, but my legs and strong thighs just held on to the saddle. Now I have moved back to my hometown.. so no more horse riding for now.. till I get to find a good horse club and some strong horses, that can carry this 125 KG human being.. lol..