Question

1. what is the main goal of box jumps?

to improve strength and flexibility
to improve cardiovascular health
to improve grip strength, shoulder stability, and core strength
to improve explosive power, strength, and coordination

1. during the cool - down phase, how long should static stretches be held?

5 - 10 seconds
15 - 60 seconds
1 - 2 minutes
2 - 5 minutes

Explanation:

• Question 7: Box jumps are a plyometric exercise. Plyometric exercises are designed to improve explosive power. They also engage multiple muscle groups, enhancing strength. Additionally, the movement pattern requires coordination. While some strength is involved, flexibility is not the main focus (so the first option is wrong). Cardiovascular health is more associated with continuous aerobic activities (so the second option is wrong). Grip strength is more related to exercises like dead - lifts (so the third option is wrong).
• Question 8: During the cool - down phase, static stretches should be held long enough to allow the muscles to relax and lengthen. 5 - 10 seconds is too short to have a significant effect on muscle relaxation and flexibility improvement. 1 - 2 minutes or 2 - 5 minutes is too long and can cause muscle fatigue. 15 - 60 seconds is the recommended duration as it allows for proper muscle relaxation and flexibility enhancement.

Answer:

1. To improve explosive power, strength, and coordination
2. 15 - 60 seconds