noun
circuit training
A fitness training method where you move through a series of exercises with little rest between them.
ジムでサーキットトレーニングを始めた。
I started circuit training at the gym.
サーキットトレーニングは短時間で効果が出る。
Circuit training is effective in a short time.
Variant with interpunct; less common but still seen.
Borrowed from English 'circuit training'.