Toned singer Madonna only sticks to her strict fitness regime because she is terrified the men in her life would go off her is she was in bad shape.

The pop superstar admits she'd love to feel confident with a plumper physique but fears some men, including husband Guy Ritchie, would find it a turn-off.

She tells Elle magazine, "I wish I were comfortable enough to look (like that).

"But I choose men who like carved-out women, the 'Can you run for the bus?' kind of guy."