It's a growing fitness trend. People say wearing a weighted vest when you exercise builds bones, strengthens muscles and improves cardiovascular health. But does research back up these claims?
Are weighted vests good for bones and muscle? Fact-checking a fitness trend
Maria Fabrizio/for NPR
It seems like you can't go anywhere without seeing someone wearing a weighted vest. They're at the gym, on hiking trails, in public parks and on social... [5670 chars]