Gardening burns calories. Here's a general idea of calories expended during 30 minutes of common gardening activities. You might get away with it at 20, but not at 50 and 60. It's painfully clear you've overdone the gardening thing.
Men usually lift things that are too heavy, like shoveling rocks into a wheelbarrow.
Long a proven stress-buster, gardening is fast becoming an accepted fitness activity. But there's a right way and wrong way to torch calories while bonding with your tuberous begonias. So, along with the studies, there are those who offer advice and various programs aimed at boosting fitness levels for serious digging in the dirt. You are using so many gardening muscle groups you need to keep them strong. Like plants, muscles need to be fertilized to withstand the long gardening season ahead.