徐々に体が動かなくなっていくって英語でなんて言うの？

「徐々に体が動かなくなっていく」は英語で「You gradually lose the ability to move your body.」と言います。でも、ALSの場合なら「You gradually lose the ability to use your muscles.」でも大丈夫です。筋肉に関する病気なのです。 徐々に体が動かなくなっていく病気は怖いですね。 A disease where you gradually lose the ability to move your body is quite scary, isn't it?

"ALS is a disease that is losing the use of mussels gradually"　⇒　"ALS is a type of disease that gradually makes you lose the use of your muscles." "lost"＝「無くす」という言葉で問題はありませんが、"rob"＝「盗む」という言い方も使えます：　"ALS is a type of disease that gradually robs you of your use of the muscles."