Weegy: Researchers have concluded that there is a link between A. [ episodic
physical activity with the risk of heart attack and sudden cardiac death within one to two hours following the activity.
Episodic physical activity increased the risk of heart attack by 3.5 times
"But because the activities are relatively rare, once in a daily routine, and because their effect is transient just one to two hours, overall they cannot have a big ... (More)