BIOMEKANIKA LARI

Summary

This video explores the biomechanics of running, focusing on the differences between movement and motor actions, as well as key principles that enhance running efficiency and reduce injury risk. Topics include the concepts of locomotor vs. non-locomotor movements, intrinsic and extrinsic factors in running injuries, and Newton's laws applied to running mechanics. The video discusses techniques for improving performance, such as posture adjustments, minimizing resistance, and optimizing leg movement. It also covers practical exercises to strengthen muscles and improve flexibility for better running form. Ultimately, it emphasizes efficient motion for injury prevention and better athletic performance.

Takeaways

• 😀 Movement refers to external actions that are easily observed, while motor is internal and harder to observe.
• 😀 Locomotor movements cause a shift in location (e.g., running, walking), whereas non-locomotor movements do not (e.g., clapping, twisting).
• 😀 Running is a high-impact sport that can lead to injuries due to repetitive stress on the body.
• 😀 Extrinsic factors, such as changes in running volume or intensity, contribute to running injuries.
• 😀 Intrinsic factors, such as posture and running mechanics, also increase the risk of injuries.
• 😀 Understanding good biomechanics in running reduces energy consumption, improves efficiency, and prevents injuries.
• 😀 The Law of Inertia explains that the body resists changes in motion, especially during take-off and stopping.
• 😀 When turning while running, the body needs to lean inward to maintain a straight-line motion.
• 😀 Newton’s Second Law of acceleration: The more force applied (e.g., leg power), the greater the acceleration in running.
• 😀 Action and Reaction: For every action (foot pushing against the ground), there’s an equal and opposite reaction (forward motion).
• 😀 Minimizing vertical movement and lateral movements in running helps save energy and increases efficiency.

Q & A

What is the difference between movement and motor in biomechanics?

Movement refers to external motion that is easy to observe, while motor refers to internal movement that is difficult to observe. Both terms describe different aspects of motion in biomechanics.

What are the two main types of movement in biomechanics?

The two main types of movement are locomotor movements, which involve displacement (like walking or running), and non-locomotor movements, which do not involve displacement (like clapping or twisting).

How does running impact the body in terms of biomechanics?

Running places repeated impact on the body, which requires the body to absorb forces continuously. This repetitive impact can lead to injuries if proper biomechanical techniques are not followed.

What are extrinsic and intrinsic factors in running injuries?

Extrinsic factors are external influences such as sudden changes in intensity or volume of running, while intrinsic factors are related to the biomechanics of the runner, like poor posture or excessive pronation, which can increase the risk of injury.

What is the significance of inertia in running?

Inertia, described by Newton's First Law, means that a body at rest will stay at rest unless a force acts on it. In running, inertia is important because the body resists changes in its state of motion, requiring forces to move or stop the runner.

How does running in curves relate to biomechanics?

When running in curves, the body must lean inward to maintain balance. This inward lean helps control the body’s direction and keeps the runner from falling outward due to centrifugal force.

What is the relationship between acceleration and force in running?

According to Newton's Second Law, the acceleration of a body is directly proportional to the net force applied. In running, greater force applied by the lower legs results in greater acceleration, leading to increased speed.

Why is minimizing vertical movement important in running?

Minimizing vertical movement during running reduces unnecessary energy expenditure. Efficient runners aim to limit upward and downward movement, focusing instead on forward motion to conserve energy.

How does air resistance affect running performance, and how can it be reduced?

Air resistance slows down runners, but leaning slightly forward while running reduces the effect of air resistance. Additionally, tailwinds (winds from behind) can assist by reducing the effort needed to run.

What exercises are recommended to improve running efficiency and prevent injury?

The video recommends exercises such as push-ups on the wall to strengthen the arms, high knee lifts to improve thigh muscles and posture, back exercises to balance the torso, and arm swings to enhance arm motion and prevent lateral movements.