Astronauts’ heart and blood vessel function drops during long space missions, limiting their ability to exercise. Researchers examined data gathered from nine men and women who spent about six months at the International Space Station, comparing how they did on a stationary bike exercise before liftoff and after returning to Earth. The astronauts had a 30 to 50 percent drop in their exercise capacity. Study authors say more research is needed to figure out why this happens and what can be done to prevent it.

A University of Michigan survey finds many American parents think their children are safe from drowning in pools. Investigators interviewed 1,500 parents, finding only a few would allow their children to swim unsupervised in a lake or ocean, but nearly 40 percent would allow them to swim unsupervised in a backyard, hotel or neighborhood pool. The team believes familiar places may provide a false sense of security, and they urge parents to watch their kids in the water – even if they think their child is a good swimmer.

And finally, singer Barry Manilow has postponed two shows due to sprained vocal chords. The 73-year-old singer-songwriter was due to perform at The Forum in Los Angeles and Allstate Arena in Chicago this week, but was forced to cancel both shows on “doctor’s orders.” A statement posted on Manilow’s Facebook page says the concerts have been rescheduled and tickets issued for the original dates will be honored.