Validity and reliability of two NIRS devices to measure resting hemoglobin in elite cyclists

  1. Gandia-Soriano, Alexis 4
  2. Salas-Montoro, José-Antonio 1
  3. Javaloyes, Alejandro 3
  4. Lorente-Casaus, Carlos 4
  5. Zabala, Mikel 1
  6. Priego Quesada, Jose Ignacio 445
  7. Mateo March, Manuel 23
  1. 1 Universidad de Granada
    info

    Universidad de Granada

    Granada, España

    ROR https://ror.org/04njjy449

  2. 2 BMX, Spanish Cycling Federation, Alicante, Spain
  3. 3 Universidad Miguel Hernández de Elche
    info

    Universidad Miguel Hernández de Elche

    Elche, España

    ROR https://ror.org/01azzms13

  4. 4 Universitat de València
    info

    Universitat de València

    Valencia, España

    ROR https://ror.org/043nxc105

  5. 5 Consejo Superior de Deportes (CSD), Red Española de Investigación del Rendimiento Deportivo en Ciclismo y Mujer (REDICYM), Madrid, Spain
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Revista:
International Journal of Sports Medicine

ISSN: 0172-4622,  1439-3964

Any de publicació: 2022

Tipus: Article

DOI: 10.1055/A-1828-8499 GOOGLE SCHOLAR lock_openAccés obert editor

Altres publicacions en: International Journal of Sports Medicine

Resum

A new method to monitor internal training load from muscle oxygen saturation using near-infrared spectroscopy could be of practical application for research and training purposes. This technology has been validated in different scientific fields, including sport science, and Humon Hex and Moxy are two leading brands. However, its relationship with hemoglobin has not been studied. Forty-eight professional cyclists, 19 men and 29 women, underwent a blood test to measure hemoglobin in the early morning. Immediately afterwards, hemoglobin and muscle oxygenation were monitored at rest by Moxy and Humon Hex on their right quadriceps (where the skinfold was measured). Venous blood hemoglobin was higher than the measurement for both devices (p < 0.001). Both hemoglobin (p < 0.001) and muscle oxygen saturation measurements (p < 0.05) were higher in Humon Hex than for Moxy, and there was a reasonable reproducibility (ICC=0.35 for hemoglobin and 0.26 for muscle oxygen saturation). Skinfold had an inverse relationship with hemoglobin measurement (r = –0.85 p < 0.001 for Humon Hex and r = –0.75 p < 0.001 for Moxy). These findings suggest that resting hemoglobin data provided by these devices are not coincident with those of blood sample, and skinfold has an inverse relationship with blood hemoglobin measurement.