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Table 4 Summary of findings from meta-analysis describing the relationship between external load metrics of level 1 [3] and fatigue-related markers

From: Monitoring the Athlete Match Response: Can External Load Variables Predict Post-match Acute and Residual Fatigue in Soccer? A Systematic Review with Meta-analysis

PredictorsFatigue-related markersTimeLower CLUpper CLNumber of studies/correlationsEvidencenI2chi2p
TDMuscle damagePost0.360.050.675/3Limited48662.950.09
  G + 24H0.360.190.535/6Limited8704.730.45
  G + 48H0.230.050.426/7Moderate9704.810.44
  G + 72H− 0.02  1/1No10   
 CMJPPOG + 24H− 0.16− 0.470.152/5Conflicted67417.830.10
  G + 48H0.09− 0.080.272/5Moderate6702.460.65
 CMJ performanceG + 48H0.04  1/1No10   
  G + 72H− 0.06  1/1No10   
 Leucocytes countG + 24H− 0.10  2/1No39   
  G + 48H0.21  2/1No39   
  G + 72H0.09  2/1No39   
 CortisolPostNS  1/0No    
  G + 24H0.50  1/1Limited20   
  G + 48H0.52  1/1Limited20   
 TestosteronePostNS  1/1No20   
  G + 24HNS  1/1No20   
  G + 48HNS  1/1No20   
 PT 1 HzPost− 0.19  1/1No19   
 PT 10 HzPost− 0.20  1/1No19   
 PT 100 HzPost− 0.17  1/1No19   
 DOMSG + 24H− 0.04  1/1No20   
  G + 48H0.06  1/1No20   
  G + 72H0.04  1/1No20   
 PT Concentric KEG + 24H− 0.68  1/1Limited20   
  G + 48H0.43  1/1Limited20   
  G + 72H0.42  1/1Limited20   
 PT Concentric KFG + 24H− 0.76  1/1Limited20   
  G + 48H0.65  1/1Limited20   
  G + 72H0.58  1/1Limited20   
 PT Eccentric KEG + 24H− 0.59  1/1Limited20   
  G + 48H0.40  1/1Limited20   
  G + 72H0.44  1/1Limited20   
 PT Eccentric KFG + 24H− 0.82  1/1Limited20   
  G + 48H0.58  1/1Limited20   
  G + 72H0.56  1/1Limited20   
 BAM+G + 24H0.09  1/1No35   
  G + 48H0.14  1/1No35   
TD/minMuscle damageG + 24H0.130.050.262/2Limited67   
  G + 48H− 0.060.00− 0.112/2Limited67   
 CMJPPOG + 24H− 0.03− 0.05− 0.012/2Limited67   
  G + 48H− 0.11− 0.11− 0.102/2Limited67   
 BAM+G + 24H− 0.47  1/1Limited35   
  G + 48H− 0.51  1/1Limited35   
HIRMuscle damagePost0.550.330.785/3Moderate45593.400.18
  G + 24H0.37  3/ 1Limited20   
  G + 48H0.370.210.533/2Limited3500.570.45
 MVIC DomG + 24H− 0.55  2/1Limited20   
  G + 48H0.43  2/1Limited20   
  G + 72H0.46  2/1Limited20   
 DOMSG + 24H− 0.03  2/1No34   
  G + 48H0.00  2/1No34   
  G + 72H0.04  2/1No34   
 Leucocytes countG + 24H− 0.11  2/1No39   
  G + 48H0.21  2/1No39   
 CortisolPostNS  2/0No    
  G + 24HNS  1/0No    
  G + 48HNS  1/0No    
 TestosteronePostNS  2/0No    
  G + 24HNS  1/0No    
  G + 48HNS  1/0No    
 PT 1 HzPost− 0.22  1/1No19   
 PT 10 HzPost− 0.24  1/1No19   
 PT 100 HzPost− 0.20  1/1No19   
 PT Concentric KEG + 24H− 0.69  1/1Limited20   
  G + 48H0.46  1/1Limited20   
  G + 72H0.45  1/1Limited20   
 PT Concentric KFG + 24H− 0.77  1/1Limited20   
  G + 48H0.68  1/1Limited20   
  G + 72H0.59  1/1Limited20   
 PT Eccentric KEG + 24H− 0.59  1/1Limited20   
  G + 48H0.43  1/1Limited20   
  G + 72H0.46  1/1Limited20   
 PT Eccentric KFG + 24H− 0.83  1/1Limited20   
  G + 48H0.60  1/1Limited20   
  G + 72H0.58  1/1Limited20   
VHIRMuscle damagePost0.670.400.945/3Moderate457780.02
  G + 24H0.540.350.655/6Strong8702.800.73
  G + 48H0.360.190.535/7Moderate8704.550.47
 CMJPPOG + 24H− 0.52− 0.64− 0.402/5Strong6702.210.70
  G + 48H− 0.25− 0.48− 0.022/5Limited6704.630.33
 MVIC DomG + 24H− 0.57  1/1Limited20   
  G + 48H0.45  1/1Limited20   
  G + 72H0.43  1/1Limited20   
 Leucocytes countG + 24H− 0.12  2/1No39   
  G + 48H0.19  2/1No39   
 BAM+G + 24H− 0.21  1/1No35   
  G + 48H− 0.17  1/1No35   
 CortisolPostNS  2/0No    
  G + 24HNS  1/0No    
  G + 48HNS  1/0No    
 TestosteronePostNS  2/0No    
  G + 24HNS  1/0No    
  G + 48HNS  1/0No    
 CMJ performancePostNS  1/0No    
  G + 24HNS  1/0No    
  G + 48HNS  1/0No    
 DOMSG + 24H0.07  1/1No20   
  G + 48H0.07  1/1No20   
  G + 72H− 0.10  1/1No20   
 PT Concentric KEG + 24H− 0.69  1/1Limited20   
  G + 48H0.51  1/1Limited20   
  G + 72H0.51  1/1Limited20   
 PT Concentric KFG + 24H− 0.78  1/1Limited20   
  G + 48H0.72  1/1Limited20   
  G + 72H0.61  1/1Limited20   
 PT Eccentric KEG + 24H− 0.59  1/1Limited20   
  G + 48H0.51  1/1Limited20   
  G + 72H0.48  1/1Limited20   
 PT Eccentric KFG + 24H− 0.83  1/1Limited20   
  G + 48H0.63  1/1Limited20   
  G + 72H0.62  1/1Limited20   
VHIR dist/minMuscle damageG + 24H0.370.110.552/5Limited67   
  G + 48H0.130.050.312/5Limited67   
 CMJPPOG + 24H− 0.22− 0.48− 0.032/5Limited67   
  G + 48H− 0.25− 0.530.052/5Limited67   
 BAM+G + 24H− 0.44  1/1Limited35   
  G + 48H− 0.40  1/1Limited35   
VHIR runs/minMuscle damageG + 24H0.240.060.422/5Limited67   
  G + 48H0.11− 0.050.292/5Limited67   
 CMJ peak powerG + 24H− 0.22− 0.49− 0.052/5Limited67   
  G + 48H− 0.20− 0.41− 0.022/5Limited67   
 CortisolPostNS  1/1No    
 TestosteronePostNS  1/1No    
 BAM+G + 24H− 0.55  1/1Limited35   
  G + 48H− 0.49  1/1Limited35   
SprintMuscle damagePost0.12  2/1Limited35   
  G + 24H0.40  2/1Limited35   
  G + 48H0.38  3/2Limited45   
  G + 72H− 0.02  1/1Limited10   
 MVICG + 24H− 0.51  2/1Limited20   
  G + 48H0.35  2/1Limited20   
  G + 72H0.35  2/1Limited20   
 Leucocyte countG + 24H− 0.10  1/1Limited20   
  G + 48H0.17  1/1Limited20   
  G + 72H− 0.23  1/1Limited20   
 DOMSG + 24H0.31  2/2Limited20   
  G + 48H0.05  2/1Limited20   
  G + 72H− 0.37  2/1Limited20   
 PT Concentric KEG + 24H− 0.58  1/1Limited20   
  G + 48H0.55  1/1Limited20   
  G + 72H0.58  1/1Limited20   
 PT Concentric KFG + 24H− 0.70  1/1Limited20   
  G + 48H0.70  1/1Limited20   
  G + 72H0.56  1/1Limited20   
 PT Eccentric KEG + 24H− 0.45  1/1Limited20   
  G + 48H0.64  1/1Limited20   
  G + 72H0.45  1/1Limited20   
 PT Eccentric KFG + 24H− 0.68  1/1Limited20   
  G + 48H0.63  1/1Limited20   
  G + 72H0.61  1/1Limited20   
 CMJ performancePostNS  2/0No    
  G + 24HNS  2/0No    
  G + 48H0.27  3/1No10   
  G + 72H0.27  3/1No10   
 TQRG + 24HNS  1/0No    
  G + 48HNS  1/0No    
  G + 72HNS  1/0No    
  1. : 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, BAM+: brief assessment of the mood, HIR: high-intensity running (> 4 m s−1), MVIC: maximal voluntary isometric contraction, VHIR: very high-intensity running (> 5.5 m s−1), conc: concentric, ecc: eccentric, Acc: acceleration, Decel: deceleration, No: no evidence, NS: not specified, PT 1–100 Hz: peak torque induced by single (1 Hz) and paired electrical stimuli (10 and 100 Hz)