also: トレイニー
noun
A person undergoing training, often in a corporate or professional setting. A straightforward loanword from English.
新入社員はまずトレーニーとして研修を受ける。
New employees first undergo training as trainees.
noun
gym rat; bodybuilding enthusiast; exercise addict
Slang term for someone who is obsessed with working out, especially bodybuilding. Often used in fitness communities.
彼は完全にトレーニーで、週6日ジムに通っている。
He's a total gym rat; he goes to the gym six days a week.