“More ease and lightness,” “a feeling of ease, of competence – very different from ‘relaxation’,” “a greater degree of ease and consequent pleasure,” are expressions that subjects have used to describe the experience. The feeling of pleasure in an everyday movement takes most subjects by surprise, and their faces break spontaneously into a smile as they notice it. “It’s a funny thing,” one of them said. “It’s as if my arms liked moving this way and wanted to do it again.” To some subjects the idea of moving against gravity (as in getting up from a chair) without effort is difficult to grasp – “a source of wonderment.”
Frank Pierce Jones (“Freedom to Change” – chapter 2 p5)