UNDER the above heading in your issue of January 18, 1872, Dr. Elliot Coues describes the peculiar movements made by the bones of the wing of the bird in flexion and extension. It may interest ...

Those movements and the main muscles responsible for making them are: Spinal flexion (rectus abdominis ... punching, etc. Spinal extension (erector spinae) – the core doesn’t just flex and rotate your ...

2. Standing lumbar extension A standing lumbar extension is another light lower back move that Dr. Matoska recommends starting with. If you’re wondering how to relieve tension in the lower back ...

The generic title of the new Netflix action-comedy Back in Action could refer to both the movie’s pedestrian story and to the entirely unrelated reason that people might be interested in ...