Skip to main content

Table 2 Responses to drop-jump protocol and impact on power output, running economy, and time trial performance

From: The Psychophysiological Regulation of Pacing Behaviour and Performance Fatigability During Long-Distance Running with Locomotor Muscle Fatigue and Exercise-Induced Muscle Damage in Highly Trained Runners

  Control (n = 22) Intervention (n = 22) p value Effect size
Drop-jump protocol
 Perceptual responses
  Muscle discomfort pre* 1.0 ± 0.9 0.7 ± 0.6 n.s.
  Muscle discomfort post* 0.8 ± 0.8 2.4 ± 1.7 < 0.001 Large
  Unpleasantness pre* 0.8 ± 0.7 0.8 ± 0.8 n.s.
  Unpleasantness post* 0.8 ± 0.7 2.3 ± 1.6 < 0.001 Large
 Isokinetic power output test
  Knee extension pre* (W) 152 ± 40 150 ± 45 n.s.
  Knee extension post* (W) 150 ± 40 133 ± 45 < 0.001 Large
 Running economy test
  Oxygen cost (ml kg−1 km−1) 199 ± 11 205 ± 14 0.005 Small
  Energy cost (kcal kg−1 km−1) 0.99 ± 0.05 1.03 ± 0.07 0.002 Medium
  Carbohydrate usage (g min−1) 2.74 ± 0.78 3.17 ± 0.96 0.013 Small
  Heart rate (bpm) 158 ± 11 164 ± 11 0.001 Small
 Perceptual responses
  Perceived physical strain 12.3 ± 1.9 13.5 ± 1.9 0.001 Medium
  Perceived mental strain 6.2 ± 1.5 7.7 ± 1.6 < 0.001 Medium
  Valence 2.9 ± 1.3 1.5 ± 1.6 < 0.001 Medium
  Felt activation 3.8 ± 1.0 4.0 ± 0.7 n.s.
 Time trial times
  TT time (h:min:s) 1:23:11 ± 0:10:25 1:26:37 ± 0:11:36 < 0.001 Small
  2nd-half/1st-half split 0.1 ± 1.1 1.4 ± 2.2 0.003 Medium
  1. * = simple (main) group effects (using partial eta squared as effect size measure) of two-way repeated measures ANOVA after significant treatment * time interaction effect. TT = time trial. Data represented as mean ± SD