The work at once. Besides Muscle coordination determines muscle tone sagging condition it’s a pretty important thing, which is more detailed ... When Bio X4 sitting, including the computer, and if we are relaxed, some muscles tense and sometimes overly. We so accustomed to not notice. Seating, trapezoidal muscles involuntarily contract which we call the shoulders, spinal some small muscles and leg muscles. By the way, in such an event, what is called a cramp, poor muscle coordination is the result? Some