WHAT IS PHYSICAL FITNESS?

WHAT IS PHYSICAL FITNESS?

There are all sorts of aspects of physical fitness – muscle strength, balance, flexibility to mention a few. The aspect which interests me and is the subject of my blogs is aerobic fitness otherwise known as cardio-respiratory fitness (CRF).   It is the measure...
EXERCISE AND OXYGEN

EXERCISE AND OXYGEN

The energy required by muscles to contract is produced by complex biochemical reactions. A critical contributor to the process is oxygen (O2).   Oxygen comprises about 20% of the air we breathe. It is absorbed from the lungs onto the haemoglobin molecules in the...
MORE ABOUT MUSCLES

MORE ABOUT MUSCLES

  There are two broad categories of exercise. Dynamic or isotonic exercise is that which uses the regular, purposeful movement of joints and large muscle groups, particularly their Type I fibres. Isometric exercise, on the other hand, involves static contraction...
EXERCISE AND MUSCLES

EXERCISE AND MUSCLES

The muscles are the body’s engines – all movement depends on muscular contraction and relaxation. The joints and limbs are powered by muscular contraction and the physiology of muscle action is both beautiful and elegant.   Muscle function The muscles of movement are...