• time
  • Ultrasound images were recorded and speckle tracking analysis was used to quantify muscle deformation and deformation rate over 3 equal time-periods during the lifting sequence (rest, mid-lift and end-lift). (diva-portal.org)
  • The means by which all types of muscles contract is thought to be generally the same, although muscles are classified as phasic, or fast twitch, and tonic, or slow twitch, to differentiate between the various lengths of time a muscle may require to move in response to stimulation. (thefreedictionary.com)
  • middle
  • The anterior and the middle will be the subject of this post because the posterior is mostly involved as a synergist for the upper trapezius. (wordpress.com)
  • rate
  • The contractions of cardiac muscle are stimulated by a special clump of muscle tissue located on the heart (the pacemaker), although the rate of contractions is subject to regulation by the autonomic nervous system. (thefreedictionary.com)