The couple just returned from a romantic four-day trip to the Bahamas.
Jennifer Lopez and Alex Rodriguez's romance is heating up -- and getting sweaty.
The new couple was spotted working out at a private gym in Miami, Florida, on Wednesday, following their four-day trip to the Bahamas.
J.Lo and A-Rod arrived at the gym in the former baseball star's white Maybach, but entered separately.
Lopez looked ready to get her fitness on in a sexy black, while and neon ensemble, though seemingly didn't break a sweat as she left the gym appearing just as primped as when she arrived.
WATCH: Jennifer Lopez Flaunts Incredible Abs During Vacation With Alex Rodriguez
Rodriguez, meanwhile, sported all-black athletic wear, accessorizing with black Nikes and cool pair of shades.
WATCH: Jennifer Lopez Shares Photo of Her Cuddling With Alex Rodriguez
Lopez's and Rodriguez's passion for fitness isn't the only reason they make a great pair. A source told ET that the two understand each other's work commitments, both make family a priority, and obviously love Miami!
See more reasons why the couple might be in it for the long haul in the video below.