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Impact reduction during running

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  #31  
Old 5th September 2012, 08:25 AM
Blaise Dubois Blaise Dubois is offline
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Default Re: Impact reduction during running

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I presume this study has a prospective design and you used monozygotic twins Blaise?
Close to... see some point of our study. I'm waiting your critics... that I will transmit to the coauthors for improvement of the next study

Also you can send me the clinical study you produce to improve practice of clinicians (I want to learn)

Comparison of two types of running shoes for preventing injuries in recreational runners: a pilot study.

- Prospective
- Randomized control
- Population: Recreational runners subscribing to a structured 16-weeks training program towards a half-marathon.
- Inclusion criteria are the following: (1) Age between 18 and 45, (2) no past medical history of injury during the 6 months preceding the start of the 16-weeks training program, (3) be able to run at least 20 minutes continuously.
- Exclusion criteria are (1) the presence of an underlying or suspected degenerative musculoskeletal pathology in the lower limbs such as osteoarthritis, (2) a past medical history of lower limb injury or surgery potentially altering running biomechanics, (3) use of foot orthotics in the last 6 months, (4) the presence of any neuromusculoskeletal symptomatic problem in a lower limb or in the lumbo-pelvic region.
- Intervention. One group will wear modern absorbing running shoes with or without stabilization technologies (TS group) and another group will wear minimalist shoes (MS group). Subjects will go to a pre-determined specialized running shoes store where an expert in shoes fitting will propose a choice of 6 pre-determined shoe models from different brands for each group. Personal preference among the 6 models proposed and optimal fitting for every subject will determine the final choice by each participant.
- The individualized training program will be sent and running sessions will be recorded by subjects using the online system TotalCoaching.com. This online tool will enable the research team to follow every subject’s training via their running log. If a subject
modifies a run, he can write the change and the reason. An automated alert will be sent to the research team when subjects will miss a training session. We will also be able to see if subjects felt any pain during or after their activity using visual analog scales (VAS), which will be completed for every training. The number of missed training sessions will be recorded as well as trainings that were reduced by 50% or more because of pain limitation.
- Subjects will be contacted by phone or email if their log shows irregularities or recurrent pain to orientate them towards a sports physician (PF). This doctor will be blinded to the type of shoes used and his role will be to establish a diagnostic, pain sites and affectation levels by filling out a pre-conceived evaluation sheet and to recommend appropriate actions to the subject
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  #32  
Old 16th April 2013, 02:58 PM
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Default Re: Impact reduction during running

Impact reduction through long-term intervention in recreational runners: midfoot strike pattern versus low-drop/low-heel height footwear
Marlène Giandolini, Nicolas Horvais, Yohann Farges, Pierre Samozino, Jean-Benoît Morin
European Journal of Applied Physiology; April 2013
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Impact reduction has become a factor of interest in the prevention of running-related injuries such as stress fractures. Currently, the midfoot strike pattern (MFS) is thought as a potential way to decrease impact. The purpose was to test the effects of two long-term interventions aiming to reduce impact during running via a transition to an MFS: a foot strike retraining versus a low-drop/low-heel height footwear. Thirty rearfoot strikers were randomly assigned to two experimental groups (SHOES and TRAIN). SHOES progressively wore low-drop/low-heel height shoes and TRAIN progressively adopted an MFS, over a 3-month period with three 30-min running sessions per week. Measurement sessions (pre-training, 1, 2 and 3 months) were performed during which subjects were equipped with three accelerometers on the shin, heel and metatarsals, and ran for 15 min on an instrumented treadmill. Synchronized acceleration and vertical ground reaction force signals were recorded. Peak heel acceleration was significantly lower as compared to pre-training for SHOES (−33.5 ± 12.8 % at 2 months and −25.3 ± 18.8 % at 3 months, p < 0.001), and so was shock propagation velocity (−12.1 ± 9.3 %, p < 0.001 at 2 months and −11.3 ± 4.6 %, p < 0.05 at 3 months). No change was observed for TRAIN. Important inter-individual variations were noted in both groups and reported pains were mainly located at the shin and calf. Although it induced reversible pains, low-drop/low-heel height footwear seemed to be more effective than foot strike retraining to attenuate heel impact in the long term.
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Old 16th April 2013, 03:10 PM
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Default Re: Impact reduction during running

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Impact reduction through long-term intervention in recreational runners: midfoot strike pattern versus low-drop/low-heel height footwear
Marlène Giandolini, Nicolas Horvais, Yohann Farges, Pierre Samozino, Jean-Benoît Morin
European Journal of Applied Physiology; April 2013
Is impact really that important of a factor for running injuries. May want to look at Benno Nigg's study!
Attached Images
File Type: jpg Nigg Prospective Study.jpg (284.5 KB, 27 views)
File Type: jpg Nigg Impact Data.jpg (111.2 KB, 26 views)
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  #34  
Old 22nd April 2013, 07:39 PM
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Default Re: Impact reduction during running

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Impact reduction through long-term intervention in recreational runners: midfoot strike pattern versus low-drop/low-heel height footwear
Marlène Giandolini, Nicolas Horvais, Yohann Farges, Pierre Samozino, Jean-Benoît Morin
European Journal of Applied Physiology; April 2013
I just blogged about this study:
http://www.runresearchjunkie.com/imp...drop-footwear/
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