J-Lo, Phone Home!

Biking and running and swimming, oh my!

Not too shabby for a pop star who popped out a kid less than a year ago.

According to photographers, J-Lo actually submerged under the water for a few seconds and had to be rescued by her trainer. Whoops.

McConaughey, on the other hand, suffered a mild dick fracture when he got an erection beneath his wetsuit. After several moments in the cold water, however, doctors say his wee wee was just fine.