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. 2019 Dec 9;5:48. doi: 10.1186/s40798-019-0219-7

Table 5.

Summary of findings from meta-analysis describing the relationship between external load metrics (levels 2 and 3) [3] and fatigue-related markers

Predictors Fatigue-related markers Time ṝ Lower CL Upper CL Number of studies/correlations Evidence n I2 chi2 p
HI Acc Muscle damage Post 0.24 0.02 0.46 2/1 Limited 45
G + 24H 0.41 0.30 0.51 3/5 Moderate 52 0 0.97 0.91
G + 48H 0.30 0.15 0.45 3/6 Moderate 77 0 2.95 0.71
G + 72H 0.01 1/1 Limited 10
CMJPPO G + 24H − 0.61 − 0.79 − 0.42 2/5 Strong 46 24 4 0.41
G + 48H − 0.36 − 0.68 − 0.05 2/4 Limited 32 0 3.71 0.29
MVIC G + 24H − 0.79 2/1 Limited 34
G + 48H 0.74 2/1 Limited 34
G + 72H 0.46 2/1 Limited 34
DOMS G + 24H − 0.05 3/1 Limited 20
G + 48H 0.23 − 0.27 0.73 3/2 Limited 34 79 4.04 0.04
G + 72H 0.23 − 0.11 0.56 3/2 Limited 34 43 1.84 0.17
CMJ performance G + 24H NS 2/0 No
G + 48H 0.27 3/1 Limited 10
G + 72H 0.09 1/1 Limited 10
Leucocytes count G + 24H 0.17 1/1 Limited 20
G + 48H − 0.14 1/1 Limited 20
G + 72H − 0.02 1/1 Limited 20
PT Concentric KE G + 24H − 0.75 1/1 Limited 20
G + 48H 0.52 1/1 Limited 20
G + 72H 0.56 1/1 Limited 20
PT Concentric KF G + 24H − 0.84 1/1 Limited 20
G + 48H 0.70 1/1 Limited 20
G + 72H 0.58 1/1 Limited 20
PT Eccentric KE G + 24H − 0.64 1/1 Limited 20
G + 48H 0.51 1/1 Limited 20
G + 72H 0.41 1/1 Limited 20
PT Eccentric KF G + 24H − 0.89 1/1 Limited 20
G + 48H 0.62 1/1 Limited 20
G + 72H 0.69 1/1 Limited 20
TQR G + 24H NS 1/0 No
G + 48H NS 1/0 No
G + 72H NS 1/0 No
Mod to HI Acc Muscle damage Post 0.34 2/1 Limited 35
G + 24H 0.32 2/1 Limited 35
G + 48H 0.27 2/1 Limited 35
CMJ conc force G + 48H − 0.49 − 0.78 − 0.17 1/1 Limited 35
CMJ ecc force Post − 0.47 − 0.73 − 0.11 1/1 Limited 35
MVIC G + 24H − 0.74 1/1 Limited 35
G + 48H 0.80 1/1 Limited 35
G + 72H 0.49 1/1 Limited 35
DOMS G + 24H − 0.04 1/1 Limited 35
G + 48H − 0.02 1/1 Limited 35
G + 72H − 0.04 1/1 Limited 35
PT Concentric KE G + 24H − 0.75 1/1 Limited 20
G + 48H 0.56 1/1 Limited 20
G + 72H 0.64 1/1 Limited 20
PT Concentric KF G + 24H − 0.84 1/1 Limited 20
G + 48H 0.70 1/1 Limited 20
G + 72H 0.57 1/1 Limited 20
PT Eccentric KE G + 24H − 0.60 1/1 Limited 20
G + 48H 0.57 1/1 Limited 20
G + 72H 0.47 1/1 Limited 20
PT Eccentric KF G + 24H − 0.85 1/1 Limited 20
G + 48H 0.65 1/1 Limited 20
G + 72H 0.68 1/1 Limited 20
HI Decel Muscle damage Post 0.32 0.13 0.51 3/2 Limited 45
G + 24H 0.47 0.36 0.59 5/6 Strong 52 0 1.26 0.87
G + 48H 0.37 0.18 0.55 6/7 Moderate 67 0 4.8 0.44
G + 72H 0.00 1/1 Limited 10
CMJPPO G + 24H − 0.59 − 0.78 0.40 1/4 Limited 32 0 2.49 0.48
G + 48H − 0.11 − 0.42 0.19 1/4 Limited 32 0 2.63 0.45
CMJ performance G + 24H NS 1/0 No
G + 48H 0.15 2/1 Limited 10
G + 72H 0.16 1/1 Limited 10
MVIC G + 24H − 0.78 2/1 Limited 34
G + 48H 0.70 2/1 Limited 34
G + 72H 0.46 2/1 Limited 34
DOMS G + 24H − 0.11 2/1 Limited 34
G + 48H 0.08 2/1 Limited 34
PT Concentric KE G + 24H − 0.82 1/1 Limited 20
G + 48H 0.43 1/1 Limited 20
G + 72H 0.59 1/1 Limited 20
PT Concentric KF G + 24H − 0.84 1/1 Limited 20
G + 48H 0.70 1/1 Limited 20
G + 72H 0.58 1/1 Limited 20
PT Eccentric KE G + 24H − 0.55 1/1 Limited 20
G + 48H 0.53 1/1 Limited 20
G + 72H 0.53 1/1 Limited 20
PT Eccentric KF G + 24H − 0.82 1/1 Limited 20
G + 48H 0.62 1/1 Limited 20
G + 72H 0.65 1/1 Limited 20
Leucocytes count G + 24H 0.22 1/1 Limited 20
G + 48H 0.14 1/1 Limited 20
G + 72H − 0.04 1/1 Limited 20
TQR G + 24H NS 1/0 No
G + 48H NS 1/0 No
G + 72H NS 1/0 No
Mod to HI Decel Muscle damage Post 0.14 2/1 Limited 35
G + 24H 0.03 2/1 Limited 35
G + 48H 0.25 2/2 Limited 67
MVIC G + 24H − 0.80 1/1 Limited 35
G + 48H 0.76 1/1 Limited 35
G + 72H 0.39 1/1 Limited 35
CMJ conc force G + 48H − 0.49 − 0.78 − 0.17 1/1 Limited 35
CMJ ecc force Post − 0.47 − 0.73 − 0.11 1/1 Limited 35
DOMS G + 24H − 0.14 1/1 Limited 35
G + 48H 0.06 1/1 Limited 35
G + 72H 0.10 1/1 Limited 35
PT Concentric KE G + 24H − 0.82 1/1 Limited 20
G + 48H 0.40 1/1 Limited 20
G + 72H 0.59 1/1 Limited 20
PT Concentric KF G + 24H − 0.83 1/1 Limited 20
G + 48H 0.64 1/1 Limited 20
G + 72H 0.57 1/1 Limited 20
PT Eccentric KE G + 24H − 0.54 1/1 Limited 20
G + 48H 0.53 1/1 Limited 20
G + 72H 0.42 1/1 Limited 20
PT Eccentric KF G + 24H − 0.84 1/1 Limited 20
G + 48H 0.57 1/1 Limited 20
G + 72H 0.71 1/1 Limited 20
High Impact Muscle damage G + 24H 0.19 − 0.14 0.51 2/4 Limited 47 0 3.17 0.37
G + 48H 0.15 − 0.22 0.53 2/4 Limited 47 0 4.17 0.24
CMJPPO G + 24H − 0.32 − 0.61 − 0.03 2/4 Limited 50 5 5.60 0.23
G + 48H 0.04 − 0.30 0.38 1/4 Limited 32 0 3.25 0.36

ṝ : pooled correlation from Hunter and Schmidt random-effects method, CL: confidence limit, N: number of players, TD: total distance, KE: knee extension, KF: knee flexion, CMJ: countermovement jump, CMJPPO: countermovement jump peak power, PT: peak torque, DOMS: delayed onset muscle soreness, TQR: total quality of recovery, BAM+: brief assessment of the mood, HI: high intensity, Mod: moderate, MVIC: maximal voluntary isometric contraction, conc: concentric, ecc: eccentric, Acc: acceleration, Decel: deceleration, No: no evidence, Conf: conflicted