Running a marathon can be bad for the heart, especially in less prepared runners, say experts

Running a marathon can be bad for the heart, especially in less prepared runners, say experts Discuss Running a marathon can be bad for the heart, especially in less prepared runners, say experts https://www.superhumanradio.net/running-a-marathon-can-be-bad-for-the-heart-especially-in-less-prepared-runners-say-experts Sat, 20 Jun 2026 00:41:17 -0500 JComments