too much of a good thing

Too much of a good thing is no good at all.

"Sometimes there is too much of a good thing," he tells BBC Newsbeat.

But studies over the past 2 decades suggest it may be possible to get too much of a good thing: Engaging in intense exercise over many years may itself tip the heart into an unhappy electrical state, giving some athletes a risk of AF as much as five times higher than nonathletes the same age.

Yet for all that breakup songs have to offer, it’s still possible to have too much of a good thing.

"It's a classic case of too much of a good thing," Kizil says.