Keep Fit

How Many calories are you burning?
Hiking and backpacking
Calorie burn is calculated with a formula designed by exercise physiologists, using an activity's Metabolic Equivalent of Task (also known as its MET), or the amount of energy needed to complete the activity. Cross-country hiking, for example, has an MET of 6.0 and burns about 387 calories in one hour. Backpacking has a slightly higher MET of 7.0, and so it also burns more calories—about 451 an hour—because "the more weight you put on your back, the more you'll burn," Lance Cummings, training director at SEALFit Training Center in Encinitas, California, said.
Biking and spinning
"It's as easy as riding a bike," goes the old saying—but really, riding a bike can be as easy, or as difficult, as you want to make it. An hour-long bike ride at a leisurely 10 to 12 miles per hour, for example, burns about 256 calories. But crank up your effort to a race pace 16 to 20 mph and you'll torch around 773. A vigorous Spinning class on an indoor bike can burn nearly as many, about 741 calories an hour.
"Be sure you're using proper technique—driving through your heels and engaging your core" Paula Procida, a personal trainer at Clay Health Club and Spa in New York City, said. "If you're just flopping around on the saddle like a sack of potatoes, you won't burn nearly as many calories."
Source: Fox News