It's no surprise that your body would get tired after working out ○ consecutive days.
Of course your body would get tired if you worked out ○ days in a row.
ご質問ありがとうございます。
① "It's no surprise that your body would get tired"＝「あなたの体が疲れるのは当然」
"after working out ○ consecutive days."＝「○日連続に運動をした後なら」
② "Of course your body would get tired"＝「もちろんあなたの体は疲労するでしょう」
"if you worked out ○ days in a row."=「もし○日続けて運動をしたら」
ご参考に。
アメリカ合衆国 
