Answer:
muscle imbalance
Explanation:
If this was actually a true statement (whch it is not because football players are very well balanced), the focus on one or two muscle groups willl neglecting others will cause a muscle imbalance.
Flexibility has to do with stretching.
<span>a person on a low-fiber diet is at increased risk for experiencing elevated rectal vein pressure leading to formation of hemorroids.
Elevated vein pressure can cause hemorrhoids. Hemorrhoid is made of enlarged veins. It's like a varicose vein but in the rectal.</span>
This would be the first choice.
I hope i helped!