warm-up

noun
1
a short practice or a series of gentle exercises that you do to prepare yourself for doing a particular sport or activity
گرم کردن, تمرین سبک, تمرین نرمشی, تمرین مقدماتی
2
a short performance of music, comedy, etc. that is intended to prepare the audience for the main show
مقدمه, پیش‌درآمد, پیش‌نمایش
a warm-up act