For 53, I’d say I’m in pretty decent shape considering I workout 4 to 5 times a week. It takes me about 30 minutes to clear my driveway by hand but keep in mind that the snow here is a powder and not slushy at all. It makes a massive difference in the amount of effort needed.
The hardest part of shoveling snow is my fingers always freeze no matter how thick the gloves are I’m wearing. I really need to invest in some heated gloves.