Page 12 - Lesson 5.xps

MODULE-2 Physical and Physiological Aspects of Physical Education
Dimension of Physical
Education and Yog Accumulation of Lactate

When we do short duration high intensity activity then we experience burning
sensation in our muscle, this results due to accumulation of lactate acid in
our muscles which results in insufficient supply of oxygen.

Micro tears

In weight training, we put our muscle under stress that results in little tears
Note in muscle fibres. Micro tears in our muscle cause pressure on nerve and
never endings.

5.2.1.2 Long Term Effects of Exercise on Muscular System

Hypertrophy

Increase in size of the muscle due to increase in the size of muscle cell is
known as hypertrophy. Continuous weight training results in increasing the
size of muscle and strength.

Increased tendon and ligaments strength

Tendons are those connective tissue bands which connect bone to muscles
and ligaments are those bands which connect one bone to another. Regular
strength training activity increases the strength as well as flexibility of both
and it has a positive impact on cartilages.
Increase in number and size of mitochondria

As you know continuous weight training leads to hypertrophy, size of muscle
fibres also increase. In muscle fibres there are mitochondria which are also
known as power house, they produce energy because of increase in fibres.
Their space also becomes bigger and their size also increases which leads
to better aerobic and anaerobic performance.

Increase in myoglobin stores

Myoglobin is protein is found in muscle tissue which is responsible for
caring and storing of oxygen in skeletal muscles. Continuous and intensive
activity increase the quality and quantity of myoglobin stored in your
muscles. Myoglobin transports oxygen to mitochondria which produce
energy.

Increase in storage of glycogen

Long duration activity like running done continuously for several days can
improve the storage of glycogen in your muscles. Muscle glycogen does
not need oxygen to give energy. It means that if you have good storage of
glycogen then you can do long term and intensive activity.

Physical Education and Yog
70