Monthly archive Februar 2012
Bioenergetics: Biological Energy Transformation

Bioenergetics: Biological Energy Transformation

The 1st law of thermodynamics states that energy is not produced or created but just transferred around. In other words, the body doesn’t produce any energy but simply transfers the energy derived from foods inside the body to an external environment. According to Lord Kelvin, the 2nd law of thermodynamics can be expressed as: “No...
The Roles of Enzymes and Coenzymes in Chemical Reactions

The Roles of Enzymes and Coenzymes in Chemical Reactions

Enzymes have two functions, (1) they control the speed of cellular chemical reactions and (2) they control the metabolic pathways in cells. Enzymes do not cause a reaction but they control/regulate the speed at which the reactions occur. Enzymes (which are proteins) regulate the speed of a chemical reaction by lowering the energy of activation,...
High-Protein Diets Increase Risk for Dehydration

High-Protein Diets Increase Risk for Dehydration

Weather it is losing body weight or gaining muscle mass, many athletes go on a high-protein diet for different reasons. What they don’t realize is that they need to adjust their water consumption as well when following a high-protein diet to prohibit decreases in performance. Otherwise, the new diet becomes more harmful than beneficial! Protein...
What is Protein?

What is Protein?

Most people associate protein with strength and meat with protein. So is eating tons of meat efficient in making you stronger? Not really. Meat is one good source of protein but so are eggs, milk, and grains & vegetables. Learn about protein quality and available protein sources in your diet. Amino Acids Amino means “nitrogen...
What is Fat?

What is Fat?

Fat belongs to the group of nutrients called lipids. Stored body fat is an ideal fuel source for aerobic metabolism (long duration/low-to-medium intensity exercise) since fat has the highest energy density (9kcal/g). There are three forms of lipids: Triglycerides(fats and oils): in foods, 95% of fats are triglycerides; in the body, 99% of fats are...
What is Glycogen?

What is Glycogen?

The storage form of glucose in the body is glycogen, which is a complex carbohydrate (polysaccharide) stored in animal tissue. Glycogen is being stored in the liver and in muscle tissue. During exercise, muscle cells break down glycogen stores into glucose, called glycogenolysis, which occurs not only in muscle cells but also in the liver....
What is Glucose?

What is Glucose?

Glucose (also known as blood sugar), which is a monosaccharide that can be found in foods but not eaten directly, provides almost all the energy in the human brain and it is the body’s preferential source of energy during exercise.  The body takes carbohydrates, breaks them down, derives glucose, and converts it via glycolysis to...