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That daily five-mile run might be your mental sanctuary and the cornerstone of your fitness routine, but it could also be secretly undermining your health goals. While we’ve had “cardio is king” ...

You’ve seen them at the gym – the cardio bunnies who spend hours on the treadmill but never touch a weight, and the muscle-obsessed lifters who break into a cold sweat at the mere mention of running.

A cardio-only routine can transform your heart, brain, and mood faster than you think, but experts warn it may not be the full fitness solution.