"interval training" meaning in English

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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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        {
          "kind": "topical",
          "langcode": "en",
          "name": "Exercise",
          "orig": "en:Exercise",
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      "glosses": [
        "Training based upon a series of high-intensity workouts interspersed with rest or relief periods."
      ],
      "id": "en-interval_training-en-noun-f6ZgW2ty",
      "links": [
        [
          "exercise",
          "exercise"
        ],
        [
          "workout",
          "workout"
        ],
        [
          "rest",
          "rest"
        ],
        [
          "relief",
          "relief"
        ],
        [
          "period",
          "period"
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      ],
      "raw_glosses": [
        "(exercise) Training based upon a series of high-intensity workouts interspersed with rest or relief periods."
      ],
      "synonyms": [
        {
          "word": "fartlek"
        }
      ],
      "tags": [
        "uncountable"
      ],
      "topics": [
        "exercise",
        "hobbies",
        "lifestyle",
        "sports"
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      "translations": [
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "Translations",
          "word": "intervalliharjoittelu"
        },
        {
          "code": "fr",
          "lang": "French",
          "sense": "Translations",
          "tags": [
            "masculine"
          ],
          "word": "entraînement fractionné"
        },
        {
          "code": "fr",
          "lang": "French",
          "sense": "Translations",
          "tags": [
            "masculine"
          ],
          "word": "fractionné"
        },
        {
          "code": "pl",
          "lang": "Polish",
          "sense": "Translations",
          "tags": [
            "masculine"
          ],
          "word": "trening interwałowy"
        }
      ]
    }
  ],
  "word": "interval training"
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  "lang_code": "en",
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      "glosses": [
        "Training based upon a series of high-intensity workouts interspersed with rest or relief periods."
      ],
      "links": [
        [
          "exercise",
          "exercise"
        ],
        [
          "workout",
          "workout"
        ],
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          "rest",
          "rest"
        ],
        [
          "relief",
          "relief"
        ],
        [
          "period",
          "period"
        ]
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      "raw_glosses": [
        "(exercise) Training based upon a series of high-intensity workouts interspersed with rest or relief periods."
      ],
      "synonyms": [
        {
          "word": "fartlek"
        }
      ],
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        "uncountable"
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        "exercise",
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  "translations": [
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "Translations",
      "word": "intervalliharjoittelu"
    },
    {
      "code": "fr",
      "lang": "French",
      "sense": "Translations",
      "tags": [
        "masculine"
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      "word": "entraînement fractionné"
    },
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      "lang": "French",
      "sense": "Translations",
      "tags": [
        "masculine"
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      "word": "fractionné"
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    {
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      "lang": "Polish",
      "sense": "Translations",
      "tags": [
        "masculine"
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      "word": "trening interwałowy"
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  ],
  "word": "interval training"
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