Muscle Mechanics and Movement Dynamics

The video tutorial explains muscle contraction theory, emphasizing that muscles can only pull and work in pairs. It introduces key concepts such as prime movers (agonists) and antagonists, using examples like stomach crunches and bicep curls. The tutorial also covers synergists and fixators, which assist or stabilize movements. Activities are included to help learners identify these muscle roles in various exercises.

What is the primary function of muscles in the body?

• To pull and create movement

• To stabilize and relax

• To push and pull

• To push and stabilize

In a muscle pair, what is the role of the prime mover?

• To stabilize the joint

• To relax and stretch

• To assist other muscles

• To contract and initiate movement

During a stomach crunch, which muscle acts as the antagonist?

• Biceps

• Rectus abdominis

• Erector spinae

• Triceps

In a bicep curl, which muscle is the antagonist?

• Brachialis

• Triceps

• Deltoid

• Biceps

What is the role of synergist muscles during an exercise?

• To relax and stretch

• To stabilize the body

• To assist the prime mover

• To contract statically

Which muscle acts as a fixator during a bicep curl?

• Brachialis

• Triceps

• Biceps

• Deltoid

In a triceps extension, which muscle would likely act as a synergist?

• Biceps

• Brachialis

• Deltoid

• Triceps

What is the primary role of a fixator muscle?

• To assist the prime mover

• To contract and initiate movement

• To stabilize a part of the body

• To relax and stretch

During a seated row, which muscle might act as a fixator?

• Biceps

• Trapezius

• Latissimus dorsi

• Deltoid

In a step-up exercise, which muscle is likely to be a synergist?

• Hamstrings

• Gluteus maximus

• Quadriceps

• Gastrocnemius