Experts Agree These Are the 12 Healthy Habits You Should Form in Your 30s

If you weren't big on resistance training in your 20s, now's the time to add it, says Mauro S. Maietta, AFAA Certified Personal Trainer and District Fitness Manager at Crunch. "Women especially need to be aware of the risk of osteopenia and sarcopenia as they age, and resistance training is essential to stave off these common effects of aging," says Maietta.