{
  "abstract": "The Yo-Yo Intermittent Recovery Test Level 1 (YYIR1) is widely recognized as a reliable tool for assessing intermittent endurance and aerobic capacity in team sports athletes. This study aims to verify the association between YYIR1 and physiological markers of endurance performance in professional soccer players, as well as the relationship between metabolic buffering capacity, metabolic acidosis tolerance, and YYIR1 total distance. Twenty-six professional soccer athletes (26.3±4.98 years, 76.4±8.96 kg, 178±6.52 cm, 54.1±4.85 mL·kg-1·min-1 V̇O2max) performed the YYIR1 and underwent a cardiopulmonary exercise test (CPET) on a treadmill in order to assess their ventilatory thresholds (aerobic threshold (AT), respiratory compensation point (RCP), and maximal oxygen consumption (V̇O2max)), buffering capacity, and tolerance to metabolic acidosis. Correlation analyses revealed that the YYIR1 distance was significantly associated with maximal aerobic speed (r=0.542, P=0.006) and V̇O2max (r=0.492, P=0.015), but not with AT or RCP. Position-specific differences were observed in relative acidosis tolerance capacity, with midfielders presenting higher values than defenders (P=0.018, η2=0.294), whereas no significant differences were noted for relative buffering or YYIR1 distance across positions. In conclusion, maximal aerobic speed and V̇O2max were the strongest predictors of YYIR1 performance in professional soccer players, outperforming submaximal thresholds such as AT and RCP. Moreover, positional differences in acidosis tolerance were identified, as midfielders demonstrated greater relative acidosis tolerance capacity compared to defenders.",
  "abstract_shown": true,
  "affiliations": [
    "Find Your Pace Lab, São Paulo, SP, Brasil.",
    "Departamento de Biofísica e Fisiologia, Núcleo de Estudos em Fisiologia Aplicada ao Desempenho e è Saúde (NEFADS), Universidade Federal do Piauí, Teresina, PI, Brasil.",
    "Rede Nordeste de Biotecnologia (RENORBIO), Universidade Federal do Piauí, Teresina, PI, Brasil.",
    "Programa de Pós-graduação Multicêntrico em Ciências Fisiológicas (PPGMCF), Sociedade Brasileira de Fisiologia (SBFis), Universidade Federal do Piauí, Teresina, PI, Brasil.",
    "Laboratório de Avaliação e Condicionamento em Reumatologia (LACRE), Hospital das Clínicas, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil."
  ],
  "article_type": "research article",
  "arxiv": null,
  "author_total": 5,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "R C A Ferreira",
      "orcid": "0000-0003-1585-5311"
    },
    {
      "affs": [
        1,
        2
      ],
      "name": "V O Silvino",
      "orcid": "0000-0002-1992-5199"
    },
    {
      "affs": [
        0
      ],
      "name": "L V Vilhena",
      "orcid": "0009-0004-2910-1339"
    },
    {
      "affs": [
        1,
        2,
        3
      ],
      "name": "M A P Dos Santos",
      "orcid": "0000-0002-0755-6138"
    },
    {
      "affs": [
        0,
        4
      ],
      "name": "D M L do Prado",
      "orcid": "0000-0002-0321-2151"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/2cfyff50wzcsb.bib",
  "cited_by": 0,
  "doi": "10.1590/1414-431x2026e15230",
  "fulltext_url": "https://europepmc.org/articles/PMC13660868",
  "id": "2cfyff50wzcsb",
  "issns": [
    "0100-879X",
    "1414-431X"
  ],
  "landing_url": "https://europepmc.org/article/MED/42879639",
  "language": "eng",
  "licence": "CC-BY",
  "licence_label": "CC BY",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "2732|Sports Performance and Training"
    ]
  ],
  "openalex": "W7221538162",
  "pdf_url": "https://europepmc.org/articles/PMC13660868?pdf=render",
  "pmcid": "PMC13660868",
  "pmid": "42879639",
  "published": "2026-10-12",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/2cfyff50wzcsb.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:19:00Z",
      "native_id": "MED:42879639",
      "source": "europepmc",
      "url": "https://europepmc.org/article/MED/42879639"
    }
  ],
  "subjects": [
    {
      "field": "medicine",
      "origin": "openalex:2732|Sports Performance and Training",
      "subfield": "surgery"
    }
  ],
  "title": "Association between Yo-yo intermittent recovery test, physiological markers of endurance performance, and buffering capacity in professional soccer players.",
  "title_text": "Association between Yo-yo intermittent recovery test, physiological markers of endurance performance, and buffering capacity in professional soccer players.",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:19:00Z",
  "url": "https://research.draconitic.com/paper/2cfyff50wzcsb",
  "venue": "Brazilian journal of medical and biological research = Revista brasileira de pesquisas medicas e biologicas",
  "versions": []
}