Tim McGraw flexes another muscle inside the pages of Men’s Health: his heart.

The country singer covers the new summer double issue of the mag and reveals what finally caused him to stop drinking and start living.

“When your wife tells you it’s gone too far, that’s a big wake-up call,” Tim says of his former battle with alcoholism (via E! Online). “That, and realizing you’re gonna lose everything you have. Not monetarily, not career-wise, but family-wise.”

Before he lost his wife Faith Hill and three daughters Gracie, 17, Maggie, 15, and Audrey, 12, Tim put down the bottle and picked up a steady workout habit.

“I’ll be the first to admit I take it to extremes,” he says of his intense exercise regimen. “I'm not one of those people who can sorta half-ass something.”

Pick up Tim on the August/July cover of Men’s Health, available now.