Meditation is not a physcial act. it is not a posture. Meditaiton is just to be aware of your thoughts and your "being". The posture of meditation is good to bring you in a discipline so that you can learn to do it. Like kids going to school. They need to wear a uniform and sit in the classroom. It is to discipline the kid to get to learning. But just by wearing uniform and sitting in the classrrom does not guarantee the kid would learn. This is exactly for meditation. All the suggestions we hear to sit and close eyes...blah blah... is needed to bring a discipline to ourself. I read from a site that every moment in life should be like meditation.. what does it mean. it does not mean to sit in a place and meditate and not do anything. It means we watchful of your thoughts while doing all actions. This practise takes time. what we should do is sit brief time in the traditional posture and do the act. You cannot be aware of the thoughts easily. after you finish meditation continue to aware of our thoughts. Simply watch yourself. watch what you talk, how you eat, how you react.....this is then full time meditation. With this practise you also start to see your inner light.