"marathoning" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "marathon",
        "3": "ing"
      },
      "expansion": "marathon + -ing",
      "name": "suffix"
    }
  ],
  "etymology_text": "marathon + -ing",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "marathoning (uncountable)",
      "name": "en-noun"
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
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          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms suffixed with -ing",
          "parents": [],
          "source": "w"
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      ],
      "examples": [
        {
          "ref": "1988 July 29, Lawrence Rand, “Body Work: training for the triathlon”, in Chicago Reader",
          "text": "Farrell[…] says that compared to marathoning, the triathlon \"is a breeze--just because of the variety of the training and in the race itself.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "The act of running a marathon"
      ],
      "id": "en-marathoning-en-noun-NFqYZH7x",
      "links": [
        [
          "marathon",
          "marathon"
        ]
      ],
      "tags": [
        "uncountable"
      ]
    }
  ],
  "word": "marathoning"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "marathon",
        "3": "ing"
      },
      "expansion": "marathon + -ing",
      "name": "suffix"
    }
  ],
  "etymology_text": "marathon + -ing",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "marathoning (uncountable)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English terms suffixed with -ing",
        "English terms with quotations",
        "English uncountable nouns"
      ],
      "examples": [
        {
          "ref": "1988 July 29, Lawrence Rand, “Body Work: training for the triathlon”, in Chicago Reader",
          "text": "Farrell[…] says that compared to marathoning, the triathlon \"is a breeze--just because of the variety of the training and in the race itself.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "The act of running a marathon"
      ],
      "links": [
        [
          "marathon",
          "marathon"
        ]
      ],
      "tags": [
        "uncountable"
      ]
    }
  ],
  "word": "marathoning"
}