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10 p.m. Badtime May Help Your Heart Health

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Vocabulary
-cardiovascular (adj.)心血管の
-stroke (n)発作、脳卒中
-leading (adj.)主要な、首位にいる
-link (v)つなぐ、関連づける、結びつける

Abstract
Researchers in the UK found that people who sleep between 10 p.m and 11 p.m have lower rates of heart disease due to looking at data from about 88,000 people. They had followed the participants’ heart health for an average of almost six years and when they went to sleep and woke up for seven days. Participants also answered questions about their health and lifestyles.
They found people who went to bed between 10 p.m and 10:59 p.m had the lowest rates of cardiovascular disease. Going to sleep after midnight was linked with a 25% higher risk of developing heart disease. On the other hand, Going to bed before 10 p.m was linked with a 24% increase.

What are your thoughts on the findings of this study?
I understand going to bed after midnight has higher heart disease risks than sleeping between 10 p.m and 11 p.m. Because I have often felt that I hurt my heart after working the night shift. I am sure that sleeping is one of the most important elements for our health. However, I wonder why even the people who slept before 10 p.m were linked with an increase in heart disease. If it is possible, I want to know why it brings disadvantages due to going to bed before 10 p.m.
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