Health
Heart study flags dangerous rhythm risk for endurance athletes over 50
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Years of high-intensity exercise may come with an unexpected heart risk for male endurance athletes over the age of 50, according to new research from the University of Leeds.
The study, published earlier this month in the European Journal of Preventive Cardiology, found that some endurance athletes over the age of 50 experienced potentially dangerous heart rhythm disturbances during or shortly after exercise, particularly those with scarring in the heart muscle.
Researchers followed 106 healthy male runners and cyclists using wearable activity trackers and implantable heart monitors.
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About one in four experienced episodes of ventricular tachycardia, a rapid heart rhythm that can become life-threatening if sustained. Three in four of the athletes who had these episodes showed evidence of myocardial scarring.
A new study found that some endurance athletes older than 50 experienced potentially dangerous heart rhythm disturbances during or after exercise. (iStock)
“Our study shows that exercise was only associated with a risk of developing abnormal heart rhythms in those who were already high risk due to heart scarring,” lead author Wasim Javed said.
Researchers note that about 90% of exercise-related sudden cardiac deaths occur in males over 40, often without warning signs.
According to the American Heart Association, regular physical activity — even as little as 30 minutes most days — can significantly lower the risk of cardiovascular disease and stroke.
Cardiologists at the Cleveland Clinic also say exercise strengthens the heart, improves circulation and supports overall cardiovascular health.
Researchers followed 106 healthy male runners and cyclists using wearable activity trackers and implantable heart monitors. (iStock)
The findings suggest that while long-term endurance training may carry risks for a small subset of older athletes, exercise itself remains overwhelmingly beneficial.
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“Athletes who developed abnormal heart rhythms were not exercising more or harder than athletes without abnormal heart rhythms,” Javed said.
Experts say regular physical activity and exercise can significantly lower the risk of cardiovascular disease and stroke. (iStock)
“This suggests that exercise itself is not the cause but could act as a trigger for dangerous heart rhythms in those athletes already with an underlying heart issue.”
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Researchers say older male athletes, especially those with long competitive histories, should consider regular cardiovascular screening and discuss symptoms like unexplained dizziness, palpitations or breathlessness with a doctor. Wearable heart-monitoring devices may also help detect irregular rhythms early.
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“Exercise is safe and has immense benefits, but athletes in this group should have regular health checks to make sure they stay healthy,” Javed said.
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Chronic back pain may have met its match with hormone treatment, scientists say
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A hormone traditionally used to treat bone loss may hold the key to stopping chronic back pain at its source, according to a new study.
Chronic back pain is often linked to the deterioration of spinal discs and vertebral end plates, which are the thin layers of tissue separating the discs from the vertebrae, according to medical sources.
When these break down, they become porous, allowing nerves that aren’t usually impacted to enter the spinal center, leading to frequent discomfort.
GREATER WEIGHT LOSS PROMISED BY HIGHER-DOSE WEGOVY SHOT, NOW APPROVED BY FDA
Research led by Dr. Janet L. Crane at Johns Hopkins University found the parathyroid hormone (PTH) could prevent and even reverse the growth of pain-sensing nerves into damaged areas of the spine.
Parathyroid glands naturally produce PTH, which experts say plays a key role in regulating calcium levels and bone remodeling.
Research suggests a parathyroid hormone can prevent the growth of pain-sensing nerves into damaged areas of the spine. (iStock)
These findings could shift the focus of back pain treatment from managing symptoms to modifying the underlying issue, according to scientists.
“During spinal degeneration, pain-sensing nerves grow into regions where they normally do not exist. Our findings show that parathyroid hormone can reverse this process by activating natural signals that push these nerves away,” Crane said in a press release.
HIDDEN SIGNS YOUR BONES MAY BE WEAKER THAN YOU THINK, ACCORDING TO DOCTOR
Synthetic versions of PTH are already used to treat osteoporosis. Earlier research hinted that these treatments might also reduce bone-related pain, but the underlying biological mechanism was not well understood.
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Using animal models, the Johns Hopkins researchers found that one to two months of PTH treatment led to denser, more stable vertebral endplates.
More significantly, the treatment triggered bone-building cells, known as osteoblasts, to produce a protein called Slit3, the study detailed.
These findings could shift the focus of back pain treatment from managing symptoms to modifying the underlying issue, according to scientists. (iStock)
The study found that this protein repels growing nerve fibers, preventing them from infiltrating sensitive regions of the spine.
When the researchers removed Slit3 from mice, the hormone’s pain-relieving effects disappeared, confirming the protein’s critical role in the process.
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PTH is already approved by the Food and Drug Administration to treat osteoporosis. Some patients receiving the hormone for bone density have reported unexpected relief from back pain, a phenomenon this study could help explain.
This study lays a foundation for future clinical trials to explore the efficacy of PTH as a disease-modifying and pain-relieving treatment for spinal degeneration, the researchers say. (iStock)
“Our study suggests that PTH treatment of [lower back pain] during spinal degeneration may reduce aberrant innervation (abnormal nerve growth),” Crane concluded.
The doctor said this research lays the foundation for future clinical trials that will explore PTH’s effectiveness as a disease-modifying and pain-relieving treatment for spinal degeneration.
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Researchers noted several limitations, including the possibility that PTH treatment could affect the central nervous system in ways not fully explored in this study.
Because the study focused specifically on the Slit3 protein, further research is needed to determine how other genetic factors and bone-forming processes might influence spinal nerve growth and pain relief.
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The study was published in the journal Bone Research.
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