Page 2 - Chapter_12

types of Strength levels of muscle, building hormones and
Muscular strength can be classified into the improves strength and bone density.
following:
1. Isotonic Strength
2. Isometric Strength
STRENGTH

Static Strength Dynamic Strength
or or
Isometric Strength Isotonic Strength
Examples of maximum strength
Maximum Explosive Strength 2. Explosive Strength: Explosive strength
Strength Strength Endurance can be defined as the ability to overcome
resistance with high speed. It is a combination
isotonic Strength of strength and speed abilities. It is most
It is also known as the dynamic strength because commonly used in sprint starts, weight-
it is related to the movements of muscles i.e., lifting, shot put, hammer throw, javelin
the shortening and lengthening of muscles. throw, long-jump, high-jump, triple-jump
In pull-ups and push-up, dynamic strength is and pole vault, in which the strength is used
used. While doing such work outs, there is a much like as explosion. Explosive strength
diminishing tendency in dynamic strength and also stimulates fast-twitch muscle fibres. It
as a result, after sometime, muscles refuse to do improves intramuscular coordination and
work. At this point of time, an individual is not reaction time.
able to do even the extra pull up or push-up.
Another example is pressing and squatting in
which isotonic strength is used by opening and
closing of joints. Movements are clearly visible
when isotonic strength is used. Generally, it can
be divided into three types i.e., 1. Maximum
strength, 2. Explosive strength, and 3. Strength
endurance.
1. Maximum Strength: It is the ability of a
muscle to act against maximum resistance.
It is not usually used in majority of sports. Pole vault is a examples of explosive strength
It is mostly used in those sports in which
very heavy resistance have to be tackled 3. Strength Endurance: Strength endurance
e.g., weight-lifting, shot put, hammer can be defined as the ability to overcome
throw, discus throw and javelin throw. resistance or to act against under condition
In sports like long jump and high jump, of fatigue. It is the combination of strength
in which take-off her to be powerful, and endurance abilities. It is displayed
maximum strength is required for a short in activities that require a relatively long
period. duration of muscle tension with minimal
Maximum strength activator type-II fast, decrease in efficiency. It is commonly use in
twitch muscle fibres. It increases the sports like long distance races, swimming,

2 Physical Education