Fysisk træning: muskler, principper og energisystemer

It’s very important to consider and plan physical training before starting on the exercises. Physical training is not just running, muscle training, etc. You have to have a goal with the training and also know a little about how the human body works.

In this essay I will write about how the human body’s muscle system works.

I will write about how the different muscle fibers work and what the body uses them for.

I will write about the principles of physical training, how to determine ones training heart rate and finally how the muscles use different energy systems.

Muscle structure and their function:

The three major muscle types are:

Cardiac muscles

Skeletal muscles

Smooth muscles

In this essay I will only concentrate on the skeletal muscles because they are the muscles which, by converting chemical energy to mechanical energy, produce movement. I will write about the subtypes of the skeletal muscles and also their characteristics and distribution.

In the latest years there may be found a lot of new subtypes of skeletal muscle fibers, but still skeletal muscles can be characterized into these three basic types:

Slow twitch oxidative (Type 1)

Fast twitch oxidative-glycolytic (Type 2a)

Fast twitch glycolytic (Type 2b)