9.8 Knowledge Check

1. Which of the following systems is NOT involved in maintaining balance?
   • Visual system
   • Respiratory system
   • Vestibular system
   • Proprioceptive system
2. What is the primary purpose of a lunge exercise?
   • To isolate the quadriceps only
   • To challenge upper-body coordination
   • To work the lower body muscles unilaterally
   • To increase ankle flexibility
3. During explosive activities like sprinting or powerlifting, what breathing technique is commonly used?
   • Shallow breathing throughout
   • Holding the breath during exertion, then forcefully exhaling
   • Deep breathing through the nose only
   • Fast breathing throughout the movement
4. What is the difference between isolated and compound exercises?
   • Isolated exercises use multiple joints, compound uses one
   • Compound exercises focus only on aesthetics
   • Isolated exercises target one muscle group, and compound exercises involve several
   • There is no difference
5. What is a key form cue for performing a proper squat?
   • Allowing the knees to move far past the toes
   • Keeping the shoulders raised and tight
   • Maintaining a neutral spine and controlled motion
   • Holding your breath throughout the movement
6. Which modification would help improve balance for someone performing calf raises?
   • Using a resistance band
   • Performing the movement faster
   • Holding onto a wall or stable surface
   • Jumping instead of lifting heels
7. What does ROM stand for, and why is it important in exercise?
   • Rest over muscle; important for recovery
   • Range of motion; it ensures safe and effective joint movement
   • Rate of movement; it improves cardiovascular health
   • Resistance of muscle; it builds muscle tension

Correct Answers: 

1. Respiratory system
2. To work the lower body muscles unilaterally
3. Holding the breath during exertion, then forcefully exhaling
4. Isolated exercises target one muscle group, and compound exercises involve several
5. Maintaining a neutral spine and controlled motion
6. Holding onto a wall or stable surface
7. Range of motion ensures safe and effective joint movement