expression, godan verb (-ru)
get excited; get hyped up; get in a good mood
Colloquial expression for a rise in excitement, mood, or energy, often in response to something fun or anticipated. The English loanword テンション here means 'emotional state' or 'mood', not physical tension.
See also: テンション
明日の旅行を考えたら、テンションが上がってきた。
Thinking about tomorrow's trip, I got excited.
好きなアーティストの新曲を聴くと、いつもテンションが上がる。
Listening to my favorite artist's new song always gets me hyped up.