Usually, after runners complete a full marathon match, their skeletal muscle, myocardium, liver, and other tissues are presented with an elevated free radical production, lipid peroxidation and disordered ion and energy metabolism, which lead to exercise-induced fatigue. The growing popularity of marathon is an intriguing phenomenon.

complete

skeletal   adj)骨格の･骨組みの

skeletal muscle 骨格筋

muscle

myocardium　心筋

liver　/'lɪvər/　n)肝臓

tissue　n)薄い織物･紙片、生物組織　　muscle tissue 筋肉組織

present

be presented with  案などを提示される、賞などをもらう

elevate

radical　adj)基本･本質的な、根幹にかかわる重要な･重大な

production

lipid

peroxidation

disorder

metabolism　n)代謝

energy metabolism  エネルギー代謝

induce

intriguing　/ɪn'triːgɪn/　adj)好奇心･興味をそそる、魅力的な

phenomenon   /fə'nɑːmɪnən/　n)現象･事象