While Gardening?

I read a story in Variety with the headline :

Queen's Brian May Hospitalized After Ripping Glutes to Shreds while gardening.
    (for those too young to know, Brian played in a band called Queen - look it up you should know this music!)

So many questions here.
How does one rip their butt muscles to shreds from the very easy task of gardening? When I bend over my flower beds or planters I have never planted so hard or pulled weeds so hard to have "shredded my glutes"  Your abs may get a workout as well as your glutes I suppose but ripped to shreds?

The article doesn't tell us how, only that he is in a lot of pain and can't sit.
I really wish they had asked him how the hell he gardens? Does he use his hands? Why isn't his butt just bent over? If on his knees how do his knees withstand all this yet his butt is in shreds. What exactly was used in this overzealous gardening incident? Fake news? fake excuse?

I'm sorry I laughed. I am certain this is painful.
Did he mean to say his gardener did this to him & not gardening did this to him?
I am just not getting this at all.

Anyone care to educated this dumb ass? Yes, pun intended