Low lunge pose has long been recommended for tight hip flexors. These are the muscles on the top of the thigh that tighten up from prolonged sitting. But overstretching in this pose can lead to hip and low back instability and pain. It is important to know the body's limits.
Downward dog: the foundational yoga pose. The pose that is supposed to "reset everything." The pose that feels so good to practice when you wake up.
We have heard it before: pull your shoulders down and back for the best posture. For some people, however, especially those with "sloped" shoulders, this can aggravate neck tension and may even cause tingling down into the arms.
Sitting well is not complicated. It requires common sense and some intuition. When you sit well, your back feels good because your vertebrae have adequate space and circulation. Your breath is slow because your diaphragm elevates and depresses without restriction. Your neck and head feel level and without tension. You are able to concentrate because your eyes are not straining.
You know what it is: one hip pushed out to the side when standing, usually to hold a child. In the physical therapy world, it is "Hip Adduction Syndrome." Daddies can get it too, and so can non-parents, but women who are mothers are most susceptible. Over time, standing this way puts pressure on the hip and predisposes the lower back, knees, neck and shoulders to arthritis.