Lever Systems in Human Movement

This video tutorial covers the basics of lever systems, focusing on the fulcrum, resistance, and effort components. It explains the FRE123 concept and provides examples of first, second, and third class lever systems in sports. The video also discusses mechanical advantage and disadvantage, offering insights into how these principles apply to exercises like calf raises and bicep curls. The tutorial concludes with exam tips and encourages viewers to ask questions.

What are the three main components of a lever system?

• Joint, Weight, Muscle

• Pivot, Load, Force

• Fulcrum, Resistance, Effort

• Axis, Load, Effort

In a first-class lever system, where is the fulcrum located?

• At the resistance end

• In the middle

• At the end

• At the effort end

Which of the following is an example of a first-class lever system?

• Calf raise

• Tricep extension

• Running

• Bicep curl

In a second-class lever system, what acts as the fulcrum during a calf raise?

• The hip

• The ball of the foot

• The ankle

• The knee

Which muscle provides the effort in a second-class lever system during a calf raise?

• Biceps

• Gastrocnemius

• Hamstrings

• Quadriceps

In a third-class lever system, what is the role of the bicep during a bicep curl?

• Fulcrum

• Resistance

• Effort

• Load

Where is the fulcrum located in a third-class lever system during a bicep curl?

• Shoulder

• Wrist

• Hand

• Elbow

Which lever system is used when performing a bicep curl?

• First-class

• Second-class

• Third-class

• Fourth-class

What is the mechanical advantage of a second-class lever system?

• Short resistance arm

• Long resistance arm

• Short effort arm

• Equal effort and resistance arms

Why does a third-class lever system have a mechanical disadvantage?

• Long effort arm and short resistance arm

• Equal effort and resistance arms

• Short effort arm and long resistance arm

• No fulcrum