Yesterday, I trained hard at boxing, so I was too tired to write a diary.
The circuit training wasn’t very good, and my whole body is sore.
I’ve been feeling sluggish since then, so I just want to relax all day today.
too～to～：～過ぎて～できない（notがなくても否定になる）
my whole body ：体全体
sore：痛い（動詞）筋肉痛などの痛み
feeling sluggish：だるい（feelとセットで使う）
Just:ただ～だけ（～だけという意味を入れると使いやすい）