Country star Brantley Gilbert has been ordered to cut down on his rigorous workout regimen after suffering an umbilical hernia.

The You Don't Know Her Like I Do singer has been hitting the gym five days a week, but his penchant for lifting heavy weights on a daily basis has resulted in a painful abdominal injury.

He tells TasteofCountry.com, "I've got four tears in my stomach."

However, Gilbert isn't convinced his physical exercise is to blame for the ailment as he has always felt a strain on his stomach when he belts out a tune.

He says, "I think I really, legitimately got it from singing."