We can respect Kevin Federline for working out so hard to lose weight that he passes out, but he may want to scale back, having been hospitalized twice now.

The ex-Mr. Britney Spears was rushed to the hospital a SECOND TIME since filming Excess Baggage, an amusingly-named Australian Celebrity Fit Club spinoff.

Apparently he was in the midst of an AFL training session with the Greater Western Sydney Giants on Monday afternoon when he complained of chest pains.

A spokesperson for the network airing the show said:

"Kevin was at Doonside with the [Giants], completing an AFL-related challenge. He did his challenge, which was running and catching the ball, then while his [in-series weight-loss partner] was taking the same challenge, he reported chest pains and a racing heart."

"We have a lot of paramedics on standby and they treated him for the first signs of a minor cardiac arrest, called an ambulance and had him taken to hospital."

Fortunately, tests revealed he did not have a heart attack.

Still, don't fight the good fight too hard, Kev.

[Photo: WENN.com]