The most common answer from hikers is “A lot.”

    But, a new study published in the journal BMC Medicine found that the calories burned by a walk down a trail in Michigan may not be accurate.

    Researchers from Michigan State University, the University of Michigan and the University in Oxford found that walking along a trail for at least three hours was “a common and efficient means of weight loss.”

    In fact, the researchers found that participants walked about 50 miles each day, and that those miles were mostly covered by the use of trail shoes.

    They also found that about 20 percent of participants had to walk in snow for about two days.

    The researchers found the “energy expenditure” was lower in participants who walked in winter conditions than in those who walked on trails in spring and summer.

    The study also found there was a decrease in metabolic rate (the amount of energy you expend when you move) and a decrease of “body fat percentage.”

    “It is clear that winter walks are not the best choice for weight loss,” said study author Michael Fink, M.D., Ph.

    D. “But the important question to ask is, is there any evidence that the energy expenditure in winter is actually different from that in spring?”

    “In this case, there is no significant difference in body fat percentage, which means that winter walking in Michigan is not a better choice than summer walking,” Fink said.

    The study, “Energy expenditure in the spring versus winter: a systematic review and meta-analysis,” found that those who had been walking for at most three hours for at leas time had the lowest energy expenditure and were most likely to have high rates of weight gain.

    Those who had walked for three hours or more for at the beginning of the study were more likely to lose weight.

    “We found that there is a direct relationship between the amount of time that participants spent on the trail and their body fat,” Fisk said.

    “There was a positive relationship with energy expenditure, which is a measure of the energy that a person needs to function effectively in a day.

    The higher the energy expended, the more calories burned.

    So, if you can keep your body fat down, that’s a good thing.”

    The study did not examine the effects of walking in hot weather, such as hot summer days, or the effects that walking in the cold, such like frigid nights.

    The authors also did not explore whether or not winter walking was more effective than summer walkers.

    They also found no significant differences in physical activity, sleep, or other health factors.

    “It’s interesting to see that the winter walking exercise was associated with an increased rate of weight and body fat loss,” Finks said.

    “The more we look at this question of winter walking versus summer walking, the better we understand why we have these negative outcomes in this population.

    In addition to the direct relationship of body fat, we also have the indirect relationship between winter walking and an increased risk of diabetes and cardiovascular disease.”

    Fink said that this is an important research area that will be explored in future studies.

    “This study adds a lot of weight to the evidence of the negative effects of winter exercise in winter,” he said.

    For more on winter walking, check out our guide to winter hiking.