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Guys, it may be time to get off the couch and hit the treadmill — especially if you want to have kids.

Okay, we all know that exercise is good for us. It can reduce the risk of obesity, diabetes and heart disease, to name a few benefits. Now researchers say physical activity may also help keep sperm healthy and happy.

Our friends at On Point had a fascinating discussion today with the author of a new book about ninjas.

Here's what Sam Gale Rosen, On Point's producer, told us:

President Obama will make his first presidential visit to Israel this spring, the White House announced this afternoon.

White House Press Secretary Jay Carney did not give an indication of date, but he said that Obama will also visit the West Bank and Jordan during the trip.

As The Washington Post points out, the trip comes at a time when Israeli-Palestinian peace negotiations have stalled. The Post reports:

Looking to cut back on the calories in your cocktail by mixing, say, diet soda and rum? Well, get ready for the buzz.

According to the results of a new study, this combination will leave you drunker than if you'd mixed the liquor with a sugary, caloric mixer.