Produce and secrete hormones.
We get tired after exercise because our muscle fibers get tired very quickly. This is due to the major source of energy for the muscle tissue, called adenosine triphosphate, or ATP. As the muscles make use of this supply of energy, they get tired and fatigue.
Hey there!
Biomechanics studies the Movement of the human body
So this means that: MOVEMENT is most likely your answer
Good luck on your assignment and enjoy your day!
~LoveYourselfFirst:)
