Then, between the hours of 10 a.m. to 2 p.m., our digestive functions get stronger and metabolism reaches its peak. Like nature, when the sun is highest in the sky, our body temperature is at its highest point of the day. This is when your body digests foods and burns fuel most efficiently.

Here are some examples of ways that different types of energy become mechanical energy.

• Gasoline converts chemical energy to mechanical energy in cars.
• Steam engines convert thermal energy into mechanical energy in a train.
• Your body converts chemical energy from nutrients to mechanical energy for movement.

At rest, fat constitutes as much as 85 percent of calories burned. That figure shifts to about 70 percent at an easy walking pace. If you transition to a moderate-effort run, the mix becomes about 50 percent fat and 50 percent carbohydrates, and it moves increasingly toward carbohydrates the faster you go.

Too much fat in your feces is called steatorrhea. It can be a sign of malabsorption. This means your body either isn’t absorbing nutrients properly or isn’t making the enzymes or bile needed to digest food effectively.

While you might feel lighter after pooping, you’re not actually losing much weight. What’s more, when you lose weight while pooping, you’re not losing the weight that really matters. To lose disease-causing body fat, you need to burn more calories than you consume. You can do this by exercising more and eating less.

When your body uses fat for fuel, the byproducts of fat metabolism are often excreted through urine. While peeing more frequently is unlikely to lead to weight loss, increasing your intake of water may support your weight loss goals.