Shortcut Methods

Numerical Based Concepts#

1. Muscle Contraction:

• Typical time for muscle contraction: few milliseconds to hundreds of milliseconds.
• Force generated during contraction: several times the object’s weight lifted.

2. Skeletal System:

• Percentage of body mass attributed to the human skeleton: approximately 10-12%.
• Number of bones in the human body: 206 bones.
• Length of the longest bone (Femur): around 45-55 cm.

3. Joints:

• Types of joints and examples:

  • Immovable joints: skull sutures.
  • Slightly movable joints: vertebrae.
  • Freely movable joints: knee, hip, shoulder, etc.

• Range of motion: Varies for different joints.

4. Ligaments and Tendons:

• Tensile strength: Can withstand significant force, ensuring joint stability.

5. Muscle Fatigue:

• Lactic acid accumulation during intense exercise: Can cause muscle fatigue and reduced performance.

6. Body Mechanics and Ergonomics:

• Center of gravity’s impact: Balance, posture, and movement efficiency.
• Importance of proper body mechanics: Preventing strain and injuries.