noun
practice ground; training area; driving range
General term for any facility or space used for practice, training, or rehearsal. The specific type depends on context: a golf driving range, a sports practice field, a music rehearsal room, etc.
ゴルフの練習場でドライバーの練習をした。
I practiced my driver at the golf driving range.
サッカーチームは毎週土曜日に練習場で練習する。
The soccer team practices at the training ground every Saturday.
体育館 is a gymnasium, often used for indoor sports and practice, but 練習場 is a broader term that can refer to any practice space, indoor or outdoor.
Compound of 練習 (practice) + 場 (place).