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. 2023 Aug 4;5:1143393. doi: 10.3389/fspor.2023.1143393

Table 3.

Relative reliability is reported using ICC scores, CV, SEM, and MDC.

Parameter Measurement Lowest Median Highest
SmO2 (%) ICC 0.90 (0.77–0.96) 0.90 (0.76–0.96) 0.81 (0.59–0.92)
CV 11.0% (8.4–16.1%) 22.9% (17.4–33.5%) 43.8% (33.5–63.3%)
SEM 5 (3–7) 6 (4–9) 7 (5–10)
MDC 12 16 18
HR (bpm) ICC 0.91 (0.79–0.96) 0.87 (0.71–0.94) 0.92 (0.81–0.97)
CV 4.2% (3.2%–6.2%) 4.7% (3.6%–6.7%) 2.6% (2.0%–3.7%)
SEM 3 (2–4) 4 (3–6) 3 (2–4)
MDC 8 12 8
V̇O2 (ml·min−1) ICC 0.73 (0.42–0.89) 0.97 (0.93–0.99) 0.97 (0.93–0.99)
CV 13.1% (9.9–19.4%) 6.4% (4.9%–9.4%) 6.5% (4.9%–9.6%)
SEM 116 (88–172) 101 (77–148) 174 (131–257)
MDC 323 280 482
[BLa] (mmol·L−1) ICC 0.44 (0.03–0.73) 0.71 (0.40–0.88) 0.74 (0.47–0.89)
CV 39.3% (29.9–57.4%) 35.7% (27.1–52.1%) 22.8% (17.4–32.9%)
SEM 0.3 (0.3–0.5) 0.4 (0.3–0.6) 1.7 (1.3–2.4)
MDC 0.9 1.2 4.6
RPE (CR10) ICC 0.64 (0.29–0.83) 0.70 (0.40–0.86) 0.29 (−0.17–0.64)
CV 16.8% (11.7–29.5%) 16.5% (12.6–23.8%) 12.2% (9.3–17.6%)
SEM 0.2 (0.2–0.4) 0.4 (0.3–0.6) 0.8 (0.6–1.2)
MDC 0.7 1.2 2.2

95% Confidence intervals in brackets. Coefficient of variation (CV) units are in percent. Absolute reliability is reported as standard error of the measurement (SEM) and minimal detectable change (MDC) use the original units of each parameter. Muscle oxygen saturation (SmO2), heart rate (HR), systemic oxygen uptake (V̇O2), blood lactate concentration ([BLa]), and rate of perceived exertion (RPE).