[kr4]

I also practice concentrative meditation and the sensations just keep on increasing as you keep walking on the path. Seems like one is just full of these sensations. As per yogic texts, we have three bodies [0] comprising of five sheeths. One of the sheaths is called pranik (energy).

I alternate between sound (mantra) and form, and sometimes formless as well [1].

Ke to do concentrative meditation can be summed up in one line (taken from [2]) “Exert when relaxed and relax when exerted.”

As one walks the path, one invariably goes through these nine states of awareness: http://omswami.com/2015/02/nine-states-awareness.html

The rewards of concentrative meditation are huge. But most of them requires intense effort eventually [3].

0: http://omswami.com/2011/10/depression-definition-cause-and-c... 1: https://www.youtube.com/watch?v=LPL_eQKExN0 2. https://www.amazon.com/Million-Thoughts-Meditation-Himalayan... 3: http://omswami.com/2015/01/types-of-meditator.html