Alex Rodriguez celebrates a very special ex – just not his youngest, Jennifer Lopez.

The MLB star, who split from J.Lo in April, took to his Instagram story on June 12 to share and exercise pictures of himself Cynthia Scurtis, with whom he was married from 2002 to 2008. The couple share their daughters Natasha, 16, and your, 13.

One picture shows Cynthia helping Alex with a knee problem. He captioned the photo: “Cynthia is a world class mom for our girls … but ice cream wrapping?!?!?! LOL.”

The couple reunited for Rodrigo Garduño‘s popular fitness program 54D from Miami. Alex is a longtime fan of the high-intensity group fitness program, as are stars like Adriana Lima.

It wasn’t just Alex and Cynthia who were breaking a sweat, however. According to an Instagram post from Alex, he was celebrating the end of a nine-week fitness trip that included 22 classmates. Cynthia’s husband, Miami real estate agent Angel Nicolas, has also joined the exes to take the intensive regimen, as has Alex’s sister Susywho he said “lost 20 pounds and looks and feels better than ever before.”