"Easily" no: 9 stone is a lot! It's what, 54 kg? Most men would find 50kg lift a big effort. Excluding men who have injuries, frailty, disability, still a lot to heave. They can probably do it, just not "easily"
My dad is 6'4" & no way he could lift more than about 5 kg. Even that would be an effort. He's pretty old & starting to be frail. I reckon he last had ability to lift 50kg about 20 years ago.