Senior uses pulley exerciser at the West Hill retirement home, West Orange, New Jersey/AP
Your health roundup:
Exercise and memory: Evidence that exercise might offer some protection from Alzheimer's disease and other forms of memory loss continues to grow. Three new studies suggest the aging brain benefits from walking, weight training and exercises for strength and balance, HealthDay reports. Meanwhile, researchers have new evidence that changes in gait -- the way a person walks -- can be an early sign of Alzheimer's, reports USA Today's Janice Lloyd.
Kids' sports and obesity: Teens who play two or more sports or who walk or bike to school are less likely to be overweight or obese than other teens, new research shows. The study doesn't prove, though, that the sports, walking and biking make the difference.
PTSD screening: Soldiers back from Iraq and Afghanistan should get annual screening tests for post-traumatic stress disorder (PTSD), says a new report from the Institute of Medicine. The report also calls for more research on how well PTSD treatments are working.