Photo

Jarell Jones, 33, who served with the Marine Corps in Iraq, leads a yoga class at the Veterans of Foreign Wars Post 1 in Denver.Credit Benjamin Rasmussen for The New York Times
Related:
- Ask Well: Why Daily Weight Lifting Can Be Dangerous
- Ask Well: Are Avocados Good for You?
- Ask Well: The Laxative Effect of Prunes
For more fitness, food and wellness news, follow us on Facebook and Twitter, or sign up for our newsletter.