That is exactly what they&#x27;re trying to find out. From the article:<p>&quot;My question has always been, how much exercise do you need to do to injure the heart?&quot; Levine says. &quot;Since Ben was planning to swim across the Pacific Ocean, we thought, hey, this might be a good opportunity.&quot;<p>It could go on to show that extreme (exercising at low intensity for 8 hours a day for 5-6 months) isn&#x27;t &quot;dangerous for your health&quot;.