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Table 5 Statistical comparison of the measures for PRE and POST conditions respectively

From: Fractal correlation properties of HRV as a noninvasive biomarker to assess the physiological status of triathletes during simulated warm-up sessions at low exercise intensity: a pilot study

 

Rec

[0–6]

Stress

[0–6]

DFA a1

HR

(bpm)

CMJh

(cm)

CMJf

(N kg−1)

FTc

FTf

(Hz)

Statistical reference data

        

TE (absolute)

0.57

0.64

0.18

6.58

7.75

4.11

7.20

0.57

CV (%)

18

43

25

11

10

11

15

13

SWC (absolute)

0.37

0.44

0.12

7.33

1.18

0.69

5.50

0.38

PRE-POST change light running exercise session

        

Mean difference

(90% CI)

− 0.07 ± 0.12

(− 0.19–0.05)

− 0.34 ± 0.47

(− 0.81–0.13)

0.02 ± 0.18

(− 0.16–0.20)

0.51 ± 3.67

(− 3.16–4.18)

1.04 ± 1.03

(0.00–2.07)

0.85 ± 0.56

(0.30–1.41)

3.55 ± 2.93

(0.62–6.47)

0.33 ± 0.22

(0.11–0.55)

p value

0.291

0.223

0.866

0.805

0.099

0.020

0.053

0.021

Cohen's d

− 0.20

− 0.25

0.05

0.08

0.40

0.84

0.66

0.82

Cohen's d descriptor

Small

Small

Trivial

Trivial

Small

Large

Moderate

Large

% change

Negative/trivial/positive

(descriptor)

00/100/00

Most likely trivial

35/64/01

Possibly trivial

10/74/16

Possibly trivial

00/100/00

Very likely trivial

00/60/40

Possibly positive

00/30/70

Possibly positive

00/87/13

Likely trivial

00/65/35

Possibly positive

PRE-POST change heavy running exercise session

        

Mean difference

(90% CI)

− 0.28 ± 0.24

(− 0.53–0.04)

− 0.04 ± 0.08

(− 0.11–0.04)

− 0.28 ± 0.11

(− 0.38-(− 0.17))

− 1.40 ± 2.89

(− 4.30–1.49)

0.86 ± 1.65

(− 0.79–2.51)

0.26 ± 0.45

(− 0.19–0.71)

2.27 ± 6.08

(− 3.81–8.35)

0.25 ± 0.35

(− 0.09–0.60)

p value

0.063

0.414

0.001

0.400

0.366

0.318

0.514

0.214

Cohen's d

− 0.51

− 0.08

− 1.44

− 0.27

0.30

0.33

0.20

0.40

Cohen's d descriptor

Moderate

Trivial

Large

Small

Small

Small

Small

Small

% change

Negative/trivial/positive

(descriptor)

26/74/00

Possibly trivial

00/100/00

Most likely trivial

99/01/00

Very likely negative

00/100/00

Most likely trivial

03/61/36

Unclear

00/94/06

Likely trivial

02/80/18

Likely trivial

00/74/26

Possibly positive

  1. rec, mean score for recovery; stress, mean score for stress; DFA a1, short-term scaling exponent alpha 1 of Detrended Fluctuation Analysis; HR, heart rate; CMJh, mean jump height; CMJf, mean vertical peak force normalized to body mass; FTc, Foot Tapping contacts; FTf, Foot Tapping frequency; TE, typical error; CV, coefficient of variation; SWC, smallest worthwhile change. Data is expressed as mean differences (90% confidence intervals (90% CI), p value, standardized mean difference (Cohen’s d and descriptor) and as the percentage change with clinically relevance (percentages and descriptor)