Why do some athletes in running sports experience abdominal distress

There are a number of various reasons. Here are a few: 

1. Not enough core conditioning, need more training
2. Experiencing cramps due to disorder or illness 
3. Muscles are fast twitch, not for endurance sports
4. Breathing techniques 

Some athletes in running sports experience abdominal distress because jolting movements are involved in their activity. The pain is caused by a strained visceral ligament in the abdomen connected to the diaphragm. Abdominal pain is common to the younger ones and amateur athletes.

Depends on which disease, but as a general rule eat healthy. many vegetables.                                                        hope my answer has come to your . you for posting your question here in we hope to answer more of your questions and inquiries soon. have a nice day ahead! : )     (p.s mark as brainliest if )