Jinder didn't get jacked until earlier this year, he was flabby as shyt when he came back.
He got hired back to be a jobber to fill out the cards after the split, got in shape and now is a 3 month reigning WWE Champion with wins over Randy Orton and Nakamura. Had he not gotten in shape, he'd be in the same spot he was when he got cut the first time.
Also, saying he was flabby as shyt is a little misleading. He was in better shape when he was rehired than when he was fired. Then he kept getting in better shape until it was like holy shyt we gotta push this guy.
Hard work and clean diets