interval trainingnoun [ U ]
uk/ˈɪn.tə.vəl ˌtreɪ.nɪŋ//ˈɪn.t̬ɚ.vəl ˌtreɪ.nɪŋ/a form of physical training that consists of short periods of exercise of varying intensity (= difficulty) with short periods of rest in between
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