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:
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Types of joints and examples:
- Immovable joints: skull sutures.
- Slightly movable joints: vertebrae.
- Freely movable joints: knee, hip, shoulder, etc.
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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.
