MUSCULAR SYSTEMMUSCULAR SYSTEM

MUSCLESMUSCLES

The human body has over 600 muscles All muscles are capable of contracting and

relaxing. Muscle makes up 50% of total body weight Muscle tissue weighs more than fat The nervous system provides impulse to

control muscle contraction.

FunctionsFunctions

Body movementBody movement Adequate postureAdequate posture Essential bodily functionsEssential bodily functions

TYPES OF MUSCLES (3)TYPES OF MUSCLES (3)

Cardiac muscle - involuntary, makes up the walls of the heart

Smooth muscle- involuntary, found in blood vessels & intestinal walls & bladder.

Skeletal muscle – voluntary,voluntary, responsible for movement, for standing, sitting, body not falling over etc….. Example - biceps

  skeletalskeletal

SmoothSmooth

CardiacCardiac        

SKELETAL MUSCULAR SKELETAL MUSCULAR SYSTEMSYSTEM

Voluntary muscles. What makes us able to move.

Structure of muscular system (p.172)Structure of muscular system (p.172)

Connective TissueConnective Tissue CartilageCartilage TendonsTendons LigamentsLigaments

TYPES OF SKELETAL TYPES OF SKELETAL MUSCLE CONTRACTIONSMUSCLE CONTRACTIONS

Three types of muscle contractions.

ISOTONIC CONTRACTIONSISOTONIC CONTRACTIONS

Most common muscle contractions. Muscle length changes. A constant weight. Push-ups, lifting free-weights, throwing

kicking etc….. Two types of ISOTONIC

CONTRACTIONS.

ISOTONIC CONTRACTIONSISOTONIC CONTRACTIONS

Concentric isotonic contraction – muscle shortens (contracts) during effort – bicep curl.

Eccentric isotonic contraction – muscle lengthens during effort – recovery phase in a push-up.

ISOMETRIC ISOMETRIC CONTRACTIONSCONTRACTIONS

Exercises performed against immoveable objects.

No change in muscle length Pushing against a wall, holding a cricket bat

(forearm muscles holding bat up).

ISOKINETIC ISOKINETIC CONTRACTIONSCONTRACTIONS

Force is developed through out entire range of motion.

The amount of force applied by machine equals amount of force applied by muscle. “The harder you push the greater resistance offered by the machine.

BEST way to develop strength as works the muscle through the whole range of movement.

THE ENDTHE END