"speedwork" meaning in English

{
  "etymology_templates": [
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        "1": "en",
        "2": "speed",
        "3": "work"
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      "expansion": "speed + work",
      "name": "compound"
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  ],
  "etymology_text": "From speed + work.",
  "forms": [
    {
      "form": "speed work",
      "tags": [
        "alternative"
      ]
    }
  ],
  "head_templates": [
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      "args": {
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      "expansion": "speedwork (uncountable)",
      "name": "en-noun"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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              154,
              163
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          "ref": "2009 January 19, Sam Edmund, “Roo plans second coming”, in Herald Sun:",
          "text": "He has been one of the main beneficiaries of a revamped pre-season program that has seen the Kangaroos doing more gridiron-based repeat power efforts and speedwork.",
          "type": "quote"
        }
      ],
      "glosses": [
        "physical exercise that concentrates on speed"
      ],
      "id": "en-speedwork-en-noun-YEEQciZI",
      "links": [
        [
          "physical",
          "physical"
        ],
        [
          "exercise",
          "exercise"
        ],
        [
          "speed",
          "speed"
        ]
      ],
      "tags": [
        "uncountable"
      ]
    }
  ],
  "word": "speedwork"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "speed",
        "3": "work"
      },
      "expansion": "speed + work",
      "name": "compound"
    }
  ],
  "etymology_text": "From speed + work.",
  "forms": [
    {
      "form": "speed work",
      "tags": [
        "alternative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "speedwork (uncountable)",
      "name": "en-noun"
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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          "ref": "2009 January 19, Sam Edmund, “Roo plans second coming”, in Herald Sun:",
          "text": "He has been one of the main beneficiaries of a revamped pre-season program that has seen the Kangaroos doing more gridiron-based repeat power efforts and speedwork.",
          "type": "quote"
        }
      ],
      "glosses": [
        "physical exercise that concentrates on speed"
      ],
      "links": [
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          "physical",
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        ],
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          "exercise"
        ],
        [
          "speed",
          "speed"
        ]
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      "tags": [
        "uncountable"
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  "word": "speedwork"
}