Ideally, balanced tensile forces in our fascia & musculature structures work together to support our body with movement that is comfortable & efficient.
However, by adulthood, dysfunctional alignment & faulty breathing can become ingrained in our neuromuscular patterning, making this ideal hard to realise.
When these bad habits are adopted, people work themselves to exhaustion just moving through the day, because it takes double the effort to slouch that is takes to stand & move from the centre of their bodies.
Culture & lifestyle reinforce these weaknesses, because it has become commonplace to sit & exercise with misaligned, compressed spines.
Good posture is effortless, arising from deepening of the breathing process, the balance of tensile forces, & relaxation in the nervous system.
Above text exerts taken from Michaelle Edwards, YogAlign - Pain Free Yoga From Your Inner Core