Actually, it is a standard physiotherapy ball used in physical therapy departments all over the world. (verywellfamily.com)
Chet T. Moritz, University of Washington Co-Director, Center for Sensorimotor Neural Engineering Allen Distinguished Investigator Associate Professor Division of Physical Therapy Department of Rehabilitation Medicine, Department of Physiology and Biophysics University of Washington Institute for Neuroengineering (UWIN) Program in Neuroscience (csne-erc.org)
Exercising in cold weather definitely requires a shift in preparation mindset so I was super excited to get some tips from Julia Kajen, PT, DPT of Tufts Medical Center Physical Therapy Department, about how to exercise safely in cooler temperatures. (bostonmamas.com)