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Table 3 Correlation between changes in creatine kinase (CK) and movement and performance markers derived from global positioning system (GPS) data

From: Match play performance characteristics that predict post-match creatine kinase responses in professional rugby union players

 

Forwards (n = 23)

Backs (n = 22)

 

ΔCK

Δ% CK

ΔCK

Δ% CK

 

+16 hrs

+40 hrs

+16 hrs

+40 hrs

+16 hrs

+40 hrs

+16 hrs

+40 hrs

Sprint number

-0.172

-0.132

-0.149

-0.102

0.339*

0.419*

0.364*

0.332*

Small

Small

Small

Small

Moderate

Moderate

Moderate

Moderate

Sprinting (m)

-0.118

-0.060

-0.073

-0.016

0.409*

0.420*

0.447*

0.359*

Small

Trivial

Trivial

Trivial

Moderate

Moderate

Moderate

Moderate

High-speed (m)

-0.195

-0.133

-0.139

-0.079

0.239

0.434*

0.346*

0.437*

Small

Small

Small

Trivial

Small

Moderate

Moderate

Moderate

Total contacts

-0.204

-0.309

-0.146

-0.238

-0.097

0.113

0.080

0.363*

Small

Moderate

Small

Small

Trivial

Small

Trivial

Moderate

  1. Level of significance *p < 0.05.
  2. Effect Sizes <0.10 trivial, 0.10-0.29 small, 0.30-0.49 moderate, 0.50-0.69 large, 0.70-0.89 very large, 0.90-0.99 nearly perfect.
  3. ΔCK change in creatine kinase; Δ% CK percentage change in creatine kinase; m metres.