QSFMS, Breath Frequency (BF), Heart Rate (HR) and parameters of heart rate variability (HRV): distribution of values across the ‘no-fatigue’ and ‘fatigue’ states.

No F = No Fatigue state n = 891. F = Fatigue state n = 172.Min = minimum; 10e, 25e, 75e, 90e = respectively tenth, twenty-fifth, seventy-fifth and ninetieth percentiles; QSFMS score = number of negative items (i.e.); SU = supine; ST = standing; BF = breath frequency (breaths per minute); HR = heart rate (beats per minute); LF = spectral power in the low frequency band; HF = spectral power in the high frequency band, TP = total spectral power; nu = normalized units.*Multilevel analysis.†The modeling was conducted on Log transformation.The table describes pooled data of every athlete of the study. Thus, the differences between ‘fatigue’ and no-fatigue states are not directly comparable to statistical differences issued from the multilevel analysis in Table 3, which assessed intra-individual changes.