Assessing the feasibility of near-infrared spectroscopy for
evaluating physiological exercise thresholds

J 2025

Assessing the feasibility of near-infrared spectroscopy for evaluating physiological exercise thresholds

ISKRA, Simon a Armin PARAVLIĆ

Základní údaje

Originální název

Assessing the feasibility of near-infrared spectroscopy for evaluating physiological exercise thresholds

Autoři

ISKRA, Simon a Armin PARAVLIĆ

Vydání

Scientific Reports, NATURE PUBLISHING GROUP, 2025, 2045-2322

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

30306 Sport and fitness sciences

Stát vydavatele

Velká Británie a Severní Irsko

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Impakt faktor

Impact factor: 3.900 v roce 2024

Označené pro přenos do RIV

Ano

Kód RIV

RIV/00216224:14510/25:00142346

Organizační jednotka

Fakulta sportovních studií

Klíčová slova anglicky

NIRS; Ventilatory threshold; Cycling; Gas-exchange; Incremental test

Štítky

rivok

Změněno: 2. 3. 2026 15:09, Mgr. Pavlína Roučová, DiS.

Anotace

V originále

To examine the feasibility of using near-infrared spectroscopy (NIRS) for physiological threshold detection and whether NIRS-derived parameters differ between highly-trained and less-trained cyclists. Twenty-seven male cyclists were divided into: highly trained endurance cyclists (EA) and recreational cyclists (RA). Participants performed a step-incremental cycling test to exhaustion. Ventilatory thresholds (VT1 and VT2) were determined using gas-exchange variables. NIRS sensor was placed on the vastus lateralis muscle to identify breakpoints corresponding to ventilatory thresholds. No significant differences were observed between NIRS-derived thresholds, compared to VT1 and VT2 (F = 1.04-1.33, p = 0.26-0.36). Moderate to strong correlations were found between NIRS-derived thresholds and ventilatory thresholds (r = 0.65-0.9, p < 0.01). A moderate correlation was found between maximal oxygen uptake and minimal tissue saturation index (TSI) value during the test (r = - 0.411, p = 0.037). EA group showed tendency towards lower minimal TSI values compared to RA group (MD = 5.46% TSI, p = 0.081). NIRS is a feasible tool for non-invasive assessment of ventilatory thresholds during incremental exercise. TSI, in particular, showed lower variability compared to other NIRS-derived parameters, and may therefore be more suitable for practical applications in sport science. Highly trained athletes demonstrated distinct physiological responses compared to recreational athletes, suggesting enhanced peripheral oxygen extraction.

Citovat

ISKRA, Simon a Armin PARAVLIĆ. Assessing the feasibility of near-infrared spectroscopy for evaluating physiological exercise thresholds. Scientific Reports. NATURE PUBLISHING GROUP, 2025, roč. 15, č. 1, s. 1-11. ISSN 2045-2322. Dostupné z: https://doi.org/10.1038/s41598-025-14920-1.

@article{2527906,
   author = {ISKRA, Simon and Paravlić, Armin},
   article_number = {1},
   doi = {https://doi.org/10.1038/s41598-025-14920-1},
   keywords = {NIRS; Ventilatory threshold; Cycling; Gas-exchange; Incremental test},
   language = {eng},
   issn = {2045-2322},
   journal = {Scientific Reports},
   title = {Assessing the feasibility of near-infrared spectroscopy for evaluating physiological exercise thresholds},
   url = {https://www.nature.com/articles/s41598-025-14920-1},
   volume = {15},
   year = {2025}
}

TY  - JOUR
ID  - 2527906
AU  - ISKRA, Simon - Paravlić, Armin
PY  - 2025
TI  - Assessing the feasibility of near-infrared spectroscopy for evaluating physiological exercise thresholds
JF  - Scientific Reports
VL  - 15
IS  - 1
SP  - 1-11
EP  - 1-11
PB  - NATURE PUBLISHING GROUP
SN  - 20452322
KW  - NIRS
KW  - Ventilatory threshold
KW  - Cycling
KW  - Gas-exchange
KW  - Incremental test
UR  - https://www.nature.com/articles/s41598-025-14920-1
N2  - To examine the feasibility of using near-infrared spectroscopy (NIRS) for physiological threshold detection and whether NIRS-derived parameters differ between highly-trained and less-trained cyclists. Twenty-seven male cyclists were divided into: highly trained endurance cyclists (EA) and recreational cyclists (RA). Participants performed a step-incremental cycling test to exhaustion. Ventilatory thresholds (VT1 and VT2) were determined using gas-exchange variables. NIRS sensor was placed on the vastus lateralis muscle to identify breakpoints corresponding to ventilatory thresholds. No significant differences were observed between NIRS-derived thresholds, compared to VT1 and VT2 (F = 1.04-1.33, p = 0.26-0.36). Moderate to strong correlations were found between NIRS-derived thresholds and ventilatory thresholds (r = 0.65-0.9, p < 0.01). A moderate correlation was found between maximal oxygen uptake and minimal tissue saturation index (TSI) value during the test (r = - 0.411, p = 0.037). EA group showed tendency towards lower minimal TSI values compared to RA group (MD = 5.46% TSI, p = 0.081). NIRS is a feasible tool for non-invasive assessment of ventilatory thresholds during incremental exercise. TSI, in particular, showed lower variability compared to other NIRS-derived parameters, and may therefore be more suitable for practical applications in sport science. Highly trained athletes demonstrated distinct physiological responses compared to recreational athletes, suggesting enhanced peripheral oxygen extraction.
ER  -

ISKRA, Simon a Armin PARAVLI$\backslash$'C. Assessing the feasibility of near-infrared spectroscopy for evaluating physiological exercise thresholds. \textit{Scientific Reports}. NATURE PUBLISHING GROUP, 2025, roč.~15, č.~1, s.~1-11. ISSN~2045-2322. Dostupné z: https://doi.org/10.1038/s41598-025-14920-1.

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