I went to the gym for the first time in 3 months last night and sweat a bit.
I went to the gym for the first time in 3 months last night and did a light workout.
こう言えますよ、
❶I went to the gym for the first time in 3 months last night and sweat a bit.
(昨夜、3ヶ月ぶりにジムに行って軽く汗をかいた)。
*昨夜 は last night
*汗 sweat、汗をかく to sweat です。
* 少し a bit/ a little.
❷I went to the gym for the first time in 3 months last night and did a light workout.
(昨夜、3ヶ月ぶりにジムに行って軽く運動をした)。
*軽い運動 light workout
3ヶ月ぶりは the first time in 3 months という言い方をします。
ちなみに、1ヶ月ぶりは the first time in a month.
一週間ぶりは the first time in a week です。
参考に!