I HAVE NO IDEA. I have never worked out.
I would bet I can work circles around most of the people who have claimed they do though.
It doesn't matter whether it is with a shovel , moving large items , or just moving small items for really long periods of time.
I am fairly well built , but it comes from hard work , not a weight bench.
FTR , I am 6"1' and about 215 lbs. 15 of it is from getting old and bad habits over the last 6-7 years , but the rest was earned the hard way over the previous 30+ years.
I have been challenged by much younger and bigger guys many times, and seldom ever lost in either endurance or strength efforts such as moving large volume of material or large bulky items.
In the real world , as well as in the weight room , it is the attitude that gets it done.
I personally refuse to quit , whether in a contest with someone or in a fight.
Can't isn't in the dictionary.