Presentation on theme: "An analysis of human movement: Joints, Muscles and Mechanics in specified sporting actions (including planes and axes) What you need to know: Analyse shoulder."— Presentation transcript:
1An analysis of human movement: Joints, Muscles and Mechanics in specified sporting actions (including planes and axes)What you need to know:Analyse shoulder and elbow action in push-ups, over-arm throwing and forehand racket strokesAnalyse hip, knee and ankle action in running, kicking, jumping and squats.Types of Muscular Contractions:Understand the types of contraction- Concentric, Eccentric and Isometric related to the examined sporting actions.
2Starter Activity: Assessment for Learning Identify the ‘joint action’, ‘main agonist’ and the ‘type of muscle contraction’ occurring during the different types of sporting action.MuscularContractionSporting ActionJointActionMainAgonist
3Rec-cap Understanding & Analysing Movement Planes of MovementAxes of the bodyFrontalTransverse or horizontal axisTransverseLongitudinal AxisSagittal
4Types of Muscle Action Isometric Constant length (no movement) IsotonicIsokineticConstant speed of movementConcentric(shorteningunder tension)Eccentric(Lengtheningunder tension)
5Types of Muscular Contraction Concentric contractionThis is when a muscle shortens under tension, e.g., during the upward phase of an arm curl, the biceps brachii performs a concentric contraction as it shortens to produce flexion of the elbow.Key term: concentric contraction when a muscle shortens under tension
6Types of Muscular Contraction Eccentric contractionThis is when the muscle lengthens under tension (and does not relax). When a muscle contracts eccentrically it is acting as a brake in helping to control the movement of a body part during negative work. An example could be in landing from a standing jump. Here the quadriceps are performing negative work as they are supporting the weight of the body during landing. The knee joint is in the flexed position but the quadriceps are unable to relax as the weight of the body ensures that they lengthen under tension.Key term: eccentric contraction when a muscle lengthens under tension.
7Types of Muscular Contraction Isometric contraction This is when a muscle can contract without actually lengthening or shortening and theresult is that no movement occurs. An isometric contraction occurs when a muscle is acting as a fixator or acting against a resistance.Key term: isometric contraction when a muscle is under tension but there is no visible movement
9Complete the table below when performing a press-up. Tasks to tackle:Complete the table below when performing a press-up.Push Up ProgressionPerform the downward phase of a press-upWhat is happening at the elbow joint?Which muscle is contracting?What type of contraction is it performing?Now perform the upward phase of a press-upTry to hold the press-up in the downward phaseWhich muscle feels as if it is contracting
10Complete the table below when performing a press-up. Tasks to tackle:Complete the table below when performing a press-up.Push Up Progression Movement MuscleType of contraction123