Gardeners who regularly spend time weeding, tilling and planting in the yard or greenhouse could be benefiting from the exercise.
The number of calories burned in 45 minutes of gardening is similar to those used up in 30 minutes of aerobics, according to the National Gardening Association.
Using the garden as a workout space has multi-faceted benefits, says Sue Hamilton of the University of Tennessee.
Writing for Knox News, Ms Hamilton explained that the health benefits added to the prospect of a bountiful garden, mean that it is easier to get into the habit of gardening than other forms of exercise.
"Studies have shown that gardening can actually lower blood pressure and cholesterol or prevent diabetes, heart disease, depression and osteoporosis when practiced on a regular basis," she said.
"I also like the fact that gardening provides an adequate and challenging workout, but is not as stressful to the body as other exercise options such as jogging or aerobics."
Gotriad.com recently suggested that people take up growing their own food as a hobby that will save money and help them eat well in 2009.