Question

$\huge\underline\mathbb\red{SOLVE}$ /​

Answer 1

${\huge{\underline{\mathtt{\color{pink}{1) Lactic \: Acid}}}}}$

Due to accumulation of lactic acid in muscle

During heavy exercise , the requirement of energy is more but the supply of oxygen to produce energy is low . Therefore , aenerobic respiration takes place in our body which results in accumulation of lactic acid in muscles fatigue .

HØPÈ ÏT HÊLPS ♠♦♠