The study demonstrates that activating the vitamin D receptor (VDR) with calcitriol suppresses cell proliferation in pulmonary arterial smooth muscle cells, potentially reducing disease severity in pulmonary arterial hypertension (PAH).

Adding an extra hour every week of physical activity may lower the chance of developing the most common type of irregular heartbeat (arrythmia) by 11 percent, a new study shows.

Heat stroke is primarily classified into exertional and non-exertional forms. Exertional heat stroke results from strenuous physical activity in high heat, while non-exertional heat stroke typically affects those exposed to extreme heat without engaging in significant physical exertion.

The team found that engaging in physical activity between 2.5 and 5 hours per week -- the minimum amount recommended by the American Heart Association, showed a 60 per cent lower risk of developing atrial fibrillation. ​