Britney Spears' ex Kevin Federline was rushed to Mt Druitt Hospital in Sydney yesterday after completing a challenge for Nine's new weightloss series, Excess Baggage.

According to the TV Show's facebook page a medic on set was concerned about his high pulse rate and called an ambulance.

This is the second time the 33-year old former dancer has been hospitalised in the series.

He was previously treated for heat stress when filming in the Western Australia outback.

Federline weighed 105.4 kilograms when production began nine weeks ago.