What is the hardest working muscle in the human body?

Heart is the hardest working. Tongue has the possibility of being the most hurtful.

For me, my heart will have beaten 2 billion 999 million times, my wife made my heart skip a beat when I met her.

Anthony Griffin Oh, Anthony, you missed it. l didn't mean the tongue could hurt the most. I meant the tongue could CAUSE the most hurt.

My tongue surely gets me into a lot of trouble🤭

The heart may be the strongest working muscle for men, who never gave birth! For my money, it's the UTERUS!

gguttada, it's a muscle as well...

Heart act as a double pump Woww

he hardest working muscle is the heart. It pumps out 2 ounces (71 grams) of blood at every heartbeat. Daily the heart pumps at least 2,500 gallons (9,450 liters) of blood. The heart has the ability to beat over 3 billion times in a person’s life..

My girlfriend's hardest working muscle is definitely the tongue.

The brain must be the least hardest then!

I think for some folks it's a close race between the heart muscle and their tongues!

Ha ha i just love the report back comments you guys give back just so funny or very sarcastic I have a giggle every time to myself very fiseaciius

Some people have "hard hearts" and "loose tongues"

Doug Kern, awww how sweet are you

Bill Coe, couldn't agree more

It doesn't even stop working when we sleep.

Maldonado, my nemesis. Not a very good question.You failed to use Wikipedia.

I just checked, mine is still beating...like Charlie Watts drum in 'Angie'

🎉🎉

I considered the tongue but, after all, the heart is ALWAYS pumpin'.