Because most of the time they are not properly warming up the muscles necessary for the physical activity your partaking in.
Answer:alcohol
Explanation:bad for bisuness
The answer is tighten and contract.
In order for the students to pull the rope their muscles will need to tighten and contract so they are able to continuously pull with all their strength and power. Relaxed or twitched muscles will result in release of the rope.
Its just that the body is responding to it differently
