In regions that have had the time to reach isostatic equilibrium without being disturbed by other geological effects, such as the south-western United States, very good correlation exists between the local elevation and Bouguer gravity anomalies, providing compelling evidence for isostasy [4].he waxing and waning of ice sheets, erosion, sedimentation, and extrusive volcanism are examples of processes that perturb isostasy. The physical properties of the lithosphere (the rocky shell that forms Earth's exterior) are affected by the way the mantle and crust respond to these perturbations.
How It Works. Burn up to 400 calories in 20 minutes: That's what you'll get from a kettlebell workout. A kettlebell looks like a cast-iron cannonball with a handle on top. They come in various weights. You'll use them as you do things like lunges, lifts, and shoulder presses.
Calories Burned. Your body constantly burns calories at a slow rate regardless of your level of activity, but when you perform a challenging exercise such as the plank, you burn calories at a faster rate. A person who weighs 150 pounds will burn 221 calories in an hour of performing a plank, according to FitClick. Given that you're unlikely to perform planks for an hour, consider the calories you'll burn in a shorter duration. If you weigh 150 pounds, a plank will help you burn between three and four calories per minute.