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
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