Comparison of Alternative Methods to Improve Weight-Bearing Sagittal Plane Anterior Leg Rotation

Gabriella L. vonGaza; Loren Z. F. Chiu

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Comparison of Alternative Methods to Improve Weight-Bearing Sagittal Plane Anterior Leg Rotation

Gabriella L. vonGaza ^[1] ; Loren Z. F. Chiu ^[1]
1. [1] University of Alberta
  
  University of Alberta
  
  Canadá
Localización: Journal of strength and conditioning research: the research journal of the NSCA, ISSN 1064-8011, Vol. 35, Nº. 12, 2021, págs. 3315-3321
Idioma: inglés
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Resumen
- Promoting rearfoot plantar flexion may permit greater sagittal plane anterior leg rotation in weight-bearing tasks. Anterior leg rotation, where the proximal tibia translates forward, is required for tasks such as squatting and landing from a jump. Twenty-eight individuals with less than 25[degrees] anterior leg rotation during a weight-bearing lunge test were enrolled and randomly assigned to self-massage and stretching only (n = 15; 14 subjects retained) or self-massage and stretching plus gastrocnemius exercise (n = 13). Anterior leg rotation was assessed during a weight-bearing lunge test and a partial squat; 95% confidence interval (95% CI) of the change score and Cohen's d effect size were calculated. Anterior leg rotation in the weight-bearing lunge increased in the self-massage and stretching only (left: 95% CI [2.1[degrees]-5.4[degrees]], d = 1.14; right: 95% CI [2.3[degrees]-6.0[degrees]], d = 1.22) and self-massage and stretching plus gastrocnemius exercise (left: 95% CI [2.3[degrees]-7.5[degrees]], d = 1.71; right: 95% CI [4.2[degrees]-8.6[degrees]], d = 1.48) groups. There were no changes in anterior leg rotation in the partial squat for self-massage and stretching only (left: 95% CI [-1.2[degrees] to 2.5[degrees]], d = 0.15; right: 95% CI [-0.5[degrees] to 2.6[degrees]], d = 0.24) or self-massage and stretching plus gastrocnemius exercise (left: 95% CI [-0.2[degrees] to 4.8[degrees]], d = 0.55; right: 95% CI [-0.2[degrees] to 4.0[degrees]], d = 0.59) groups. Increases in anterior leg rotation in the weight-bearing lunge may be due to decreased passive stiffness in the plantar structures.