In the elective subject of Physical Education in class 12, there are 10 units present in the CBSE NCERT textbook. Students learn about everything ranging from biomechanics to the various ways in which one can increase body strength. Some basics of physiology are also taught which helps the students understand how the human body responds to injury and muscle fatigue. To know more, you should download the Physical Education textbook from Vedantu at free of cost. You can also download the Vedantu app to access more resources for free.