Because muscles have such a hard task. The only muscle in your body that does not get tired is your cardiac muscle also known as your HEART
The heart
Lactic acid causes muscle fatigue because it accumulates in muscles during intense exercise, leading to a decrease in pH levels. This decrease in pH interferes with muscle contractions and energy production, ultimately causing the muscles to feel tired and fatigued.
When a muscle is exercised, lactic acid is formed in the muscle, and that is what makes the muscle feel tired. With a short rest, the lactic acid is carried away by the blood stream and the tired feeling goes away.
A flexor is a muscle that causes a joint to bend. In contrast, an extension is a muscle that straightens a joint.
Plz
Heart problems muscle weakness tired confusrd
is it true your cardiac muscle tires
cutaneous muscle
Your brain.
cause it gets tired
Your cardiac muscle never gets tired, and it is the only muscle in it's category. Your skeletal muscle gets tired many times, and it has many other skeletal muscles in it's category. Your cardiac muscle is also a lot stronger than you skeletal muscle.Sorry, also your heart is an involuntary muscle. We have no control over it. Whereas skeletal muscles are voluntary, we decide to move them or not.
nothing old the muscle tissue is bad for a muscle