THE BODY IN MOTIONThe Body In Motion

JOINTS

MUSCULAR

RESPIRATORY

THE HEART

IMMEDIATE PHYSIOLOGICAL RESPONSES TO TRAINING

• HEART RATE – the number of heartbeats per minute.

• VENTILATION RATE – the volume of air passing into and out of the lungs per minute.

• STROKE VOLUME – the volume of blood pumped from a ventricle of the heart in one beat.

• CARDIAC OUTPUT – the amount of blood the heart pumps through the circulatory system in a minute.

• LACTATE LEVELS – a measure of the amount of lactic acid in the blood.

MOTION

• LINEAR MOTION – refers to all objects or parts travelling the same distance, in the same direction, at the same time.

• VELOCITY – the speed of something in a given direction.

• SPEED – is the distance covered divided by the time it takes to cover that distance in an unspecified direction.

• ACCELERATION – occurs when the motion is speeding up.

• MOMENTUM – is the amount of motion possessed by a moving object.

BALANCE AND STABILITY

• CENTRE OF GRAVITY – the balance point of the system or the point at which all mass seems to be concentrated. • LINE OF GRAVITY – a straight line drawn from

the centre of gravity to the ground.• BASE OF GRAVITY – the region bounded by the

body parts in contact with a surface that is applying a reactive force against the applied force of the body.

FLUID MECHANICS

• FLOATATION – consists of buoyant force that pushes the body up and the weight force that pulls the body down (gravity).

• CENTRE OF BUOYANCY – the centre of gravity of the water that the body displaces.

• FLUID RESISTANCE• DRAG – the resistance that acts against a body as it moves

through a fluid movement.• LIFT – occurs perpendicular to the flow of the water over

the body when swimming.• THE MAGNUS EFFECT – occurs when a spinning object

creates a whirlpool of rotating air or liquid around it.