EVERYDAY SCIENCE

Detailed explanation-1: -Because it can be easily broken down to release glucose, it’s the main way we store it. An average man (70 kg) contains about half a kilo (480 g) of glycogen. That’s just under a day’s supply of energy for someone using 2000 to 2100 Calories (8400 to 8700 kJ).

Detailed explanation-2: -The minimum energy output during a routine daily activity is about 1.800-3.000 kcal/24hours which is roughly equivalent to 7.600-12.600 kJ/24 hours. This is, however, influenced by a number of factors including sex, age, body build and overall fitness of a person in question.

Detailed explanation-3: -Moderately active men between 26–45 years need 2, 600 calories/day. Active men (who walk around 5 kilometers a day) need about 2, 800 to 3, 000 calories/day. Men between 19 to 25 years need approximately 2, 800 calories/day.

Detailed explanation-4: -The energy output of the resting adult human body is equal to the power of a 100 W electrical light bulb. With a hard physical load, it could be up to seven times larger.