Prospective Study and Results From the German Sports University of Cologne Biomechanics and Orthopedics Institute Professor Peter Brueggemann November.

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Presentation transcript:

Prospective Study and Results From the German Sports University of Cologne Biomechanics and Orthopedics Institute Professor Peter Brueggemann November 2003 to April 2004

1. To demonstrate possible benefits. 2. To quantify effects on Flexibility, Strength and Performance.

Rationale: Results in more intensive use of biological structures Use of biological systems: Makes them stronger Hypothesis: Barefoot / Nike FREE training: Does get the system

(Intervention Through Nike FREE Footwear) subgroup EG-A: master athletes subgroup EG-B: PE students (No Intervention, Conventional Footwear) subgroup CG-A: master athletes subgroup EG-B: PE students

30 males, 27 females (57) 22 males, 21 females (43) Total number of subjects under study: 100

Use of Nike FREE footwear for 30 minute warm-ups 3 – 4 times per week. Use of conventional training shoes Nov-03March-April-04

Flexor strength, left ExperimentalControl p: 0.001n.s. N PREPOSTPREPOST Statistically significant difference

Flexor strength right ExperimentalControl p: 0.01n.s. N PREPOSTPREPOST Statistically significant difference

Flexor strength left & right ExperimentalControl p: 0.01n.s. N PREPOSTPREPOST LRLRLRLR Statistically significant differences

10 50 Change of MPJ flexor strength through intervention ExperimentalControl p: N leftrightleftright Statistically significant differences

Plantar flexion strength, left ExperimentalControl p: 0.01 n.s. N PREPOSTPREPOST Statistically significant difference

Change of plantarflexor strength through intervention ExperimentalControl p: N left Statistically significant difference

Change of dorsiflexor strength through intervention ExperimentalControl N leftrightleftright Statistically significant differences

Minimum MPJ angle ExperimentalControl p: 0.01 deg PREPOSTPREPOST n.s. Statistically significant difference

Pressure Distribution Platform Marker Start / Finish Sidesteps as fast as possible 4 times back and forth (20m) Performance criterion: Total running time

Flexor strength, left ExperimentalControl p: 0.001n.s. N PREPOSTPREPOST Statistically significant difference

Shuttle run performance, time ExperimentalControl p: 0.01sec PREPOSTPREPOST Statistically significant difference

ExperimentalControl p: sec PRE Change of shuttle run performance time through intervention Statistically significant difference

ExperimentalControl p: 0.01sec PREPOSTPREPOST Statistically significant difference Shuttle run contact time

Shuttle run performance, time ExperimentalControl p: 0.01sec PREPOSTPREPOST Statistically significant difference

ExperimentalControl p: sec PRE Change of shuttle run performance time through intervention Statistically significant difference

ExperimentalControl p: 0.01sec PREPOSTPREPOST Statistically significant difference Shuttle run contact time