Muscle Roles and Movements PDF

Different types of movement s Class 4 Review of last week What is the name of the smallest contractile unit of a muscle? What is the name of the smallest contractile unit of a muscle? Sarcomere What are 4 different types of stretches? What are 4 different types of stretches?...

Different types of movement s Class 4 Review of last week What is the name of the smallest contractile unit of a muscle? What is the name of the smallest contractile unit of a muscle? Sarcomere What are 4 different types of stretches? What are 4 different types of stretches? Passive, static, active (ballistic), PNF  TRUE or False Pre-exercise stretching reduces the risk of injury  True or FALSE Pre-exercise stretching reduces the risk of injury  TRUE or FALSE Pre-exercise stretching boosts performance  TRUE or FALSE Pre-exercise stretching boosts performance  TRUE or FALSE Flexibility and stretching influence performance  TRUE or FALSE Flexibility and stretching influence performance  TRUE OR FALSE Optimal stretching time is 120 seconds.  TRUE or FALSE Optimal stretching time is 120 seconds. How many times a week and for how long do you need to stretch to achieve gains in flexibility? How many times a week and for how long do you need to stretch to achieve gains in flexibility? 180 seconds/ 3x per week  Types of muscle contractio ns  Types of muscle contractio ns  Muscle roles Agonist: muscle whose contraction is responsible for producing a particular motion Antagonist: muscle that is released when the agonist muscle is working. The roles of agonist and antagonist switch when movement is reversed. Synergist: muscle that helps the agonist (e.g. Bracchial for the bicep) Fixator: synergist that assists an agonist by preventing or reducing movement at another joint, thereby stabilizing the origin of the agonist. For example, the muscles in your back play a stabilizing role when they help you stand up straight Example: squat Quadriceps. The quadriceps is the agonist, i.e. the motor of the action, when you do a squat. (On the other hand, this same quadriceps becomes a stabilizer when you're balancing on one leg). But many stabilizing muscles work isometrically. These include the calves, hamstrings, abs and erectors of the spine. This also applies to the popliteus muscle, whose contraction stabilizes the knees. Types of mouvements Flexion/ extension mouvements Flexion/ extension mouvements Flexion/ extension mouvements Flexion/ extension mouvements Flexion/ extension mouvements Flexion/ extension mouvements Circular movements Circular movements Circular movements Circular movements