NASM Training – Human Movement System

NASM Training : Human Movement System

Form Function and Stability is the foundation to any strength conditioning program. Flexibility training is a crucial addition to any strength program. Knowing how the Human Movement System works is critical knowledge.

According to NASM, the biggest source of injury from training comes from repetitive movements.

Key Terms to understand in the Human Movement System

Golgi Tendon Organ – Part of muscle tissue, tendons and ligaments. Where the joints intersect that control the relaxation of the antagonist movers.

If you are flexing the arm in a curl, the bicep contracts while relaxing the tricep to allow for flexion of the arm.

Autogenic Inhibition – When our subconscious mind takes more effort in contracting muscle vs actual signals sent from the CNS into the PNS for movement. This is usually inhibitory movement to prevent injury.

If the Nervous System senses a defect in neuromuscular efficiency, or a weakness in an outlying area of the body part in movement it will automatically inhibit motion to prevent injury.

Also if the soft tissue in the given area are deconditioned this will cause autogenic inhibition.

Sliding Filament Theory – Concentric muscle action occurs when the contractile force is greater than the resistive force. This Results in the shortening of the muscle and the visible movement in joints.

As the muscle shortens during contraction the actin & myosin cross bridges move closer and interlap together

Motor Behavior –The Human Movement System response to internal and external movement and or outside stimulus.

  • Balance
  • Stabilization
  • Coordination
  • Reaction to Stimulus

Motor Control – How the nervous system integrates internal and external stimulus to produce motor responses.

Motor Learning – The nervous system integrates internal and external stimulus to produce motor responses.

Motor Development – The integration of the Motor Recruitment Process – Teaching the nervous system how to efficiently contract  synergistic agonist kinetic chains, while relaxing synergistic antagonist kinetic chains.

Muscle Synergies – Groups of muscles, or kinetic chains recruited to produce movement

Proprioception – The cumulative sensory input to the Central Nervous System CNS from the mechanoreceptors of the given limb or joint.

Sensorimotor integration – The ability for the Nervous system to gather correct information from the environment, and body to produce correct and efficient movement.

Feed Back – The nervous system’s ability to provide information to aid the Human Movement System in the development of Motor Learning

Other Key Terms in HMS Science : 

Muscular Force – The interaction between muscles that produces acceleration and deceleration

Force Couple Relationships – Synergistic Muscle Groups working together to produce force

Length Tension Relationships – The resting length of a given muscle and the amount of force it can produce from a resting state

Force Velocity Curve – A Given muscles ability to produce peak force from different resting positions


Movement Science Terms

  • Agonist – Prime movers
  • Synergyst – Assists Prime Movers
  •  Stabilizer – Stabilises Prime Mover and Synergystic Chains
  • Antagonist – Oppose Prime mover or Relax during movement

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