Why does raising energies keeps me awake and alert like coffee? thanks.
Discussion
Energy-raising meditations, where performed correctly and sufficiently, induce an increase in so-called bioelectricity in the physique. Electrical activity in the cells receives a boost and metabolic functions accelerate. That's why you feel this way.
On a metaphysical/quantum level, singing vibrations set your entire soul in vibration, changing and increasing its energy.