Does Specific Footwear Facilitate Energy Storage and Return at the Metatarso Phalangeal Joint in Run

NewsBot · Jan 6, 2013

Members do not see these Ads. Sign Up.
Does Specific Footwear Facilitate Energy Storage and Return at the Metatarso Phalangeal Joint in Running?
Willwacher S, König M, Potthast W, Brüggemann GP.
J Appl Biomech. 2012 Dec 27.

Longitudinal midsole bending stiffness and elasticity are two critical features in the construction of running shoes. Stiff elastic materials (e.g. carbon fiber) can be utilized to alter the midsoles bending behavior. The purpose of this study was to investigate the effects of midsole stiffness and elasticity manipulation on metatarso-phalangeal (MTP) joint mechanics during running in 19 male subjects at 3.5 m/s. Midsole bending stiffness and elasticity were modified by means of carbon fiber insoles of varying thickness. Stiffening the shoe structures around the MTP joint caused a shift of the point of force application towards the front edge of the shoe ground interface. Negative work was significantly reduced for the stiffest shoe condition and at the same time a significant increase of positive work at the MTP joint was found. It seems plausible that the increase in positive work originates from the reutilization of elastic energy that was stored inside the passive elastic structures of the shoe and toe flexing muscle tendon units. Further, an increase in midsole longitudinal bending stiffness seems to alter the working conditions and mechanical power generation capacities of the MTP plantarflexing muscle tendon units by changing ground reaction force leverage and MTP angular velocity.
Click to expand...

Admin2 · Jan 6, 2013

Related Threads:
Other threads tagged with Running Shoes
Other threads tagged with Stiffness
1st MPJ range and 100m sprint times.

Simon Spooner · Jan 8, 2013

Here: http://www.podiatry-arena.com/podiatry-forum/showthread.php?t=3990

Dr. Steven King · Jan 9, 2013

Aloha,

Thanks Admin for bringing up my favorite subject!

Don't for get this important thead...

http://www.podiatry-arena.com/podiatry-forum/showthread.php?t=75087&highlight=dr. steven king&page=3

We have released alot of our testing results on our website today for your review at...

www.kingetics.com

To access please click on our M.A.R.E.N. TM tab (Medical Advancement Research Education Nexus).

We are open to students of gait mechanics around the world to add to our research nexus. Please contact us if you have an interest in this future of gait.

Mahalo,
Steve

Dr. Steven King
Managing Member Kingetics LLC
Co-Inventor Spring Orthotic Device aka Simple Spring Machine Tricorrectional Joint
Co-Principal Investigator "Advanced Composite Insoles for the Reduction of Stress Fractures."
Chief Prototester and Renagade Speller

Dr. Steven King · Jan 9, 2013

Aloha,

Here is another related thead from a year ago.

http://www.podiatry-arena.com/podiatry-forum/showthread.php?t=67426

A Hui Hou,
Steve

Sicknote · Jan 10, 2013

The potential of toe flexor muscles to enhance performance.

http://www.ncbi.nlm.nih.gov/pubmed/23106289

Goldmann JP, Sanno M, Willwacher S, Heinrich K, Brüggemann GP.
Source: a Institute of Biomechanics and Orthopaedics , German Sport University Cologne , Cologne , Germany.

Abstract.

Abstract The metatarsal phalangeal joint (MPJ) and its crossing toe flexor muscles (TFM) represent the link between the large energy generating leg extensor muscles and the ground. The purpose of this study was to examine the functional adaptability of TFM to increased mechanical stimuli and the effects on walking, running and jumping performance. Fifteen men performed a heavy resistance TFM strength training with 90% of the maximal voluntary isometric contraction (MVIC) for 7 weeks (560 contractions) for the left and right foot. Maximal MPJ and ankle plantar flexion moments during MVICs were measured in dynamometers before and after the intervention. Motion analyses (inverse dynamics) were performed during barefoot walking, running, and vertical and horizontal jumping. Athletic performance was determined by measuring jump height and distance. Left (0.21 to 0.38 Nm · kg(-1); P < 0.001) and right (0.24 to 0.40 Nm · kg(-1); P < 0.001) MPJ plantar flexion moments in the dynamometer, external MPJ dorsiflexion moments (0.69 to 0.75 Nm · kg(-1); P = 0.012) and jump distance (2.25 to 2.31 m; P = 0.006) in horizontal jumping increased significantly. TFM responded highly to increased loading within a few weeks. The increased force potential made a contribution to an athlete's performance enhancement.
Click to expand...

NewsBot The Admin that posts the news.

Admin2 Administrator Staff Member

Simon Spooner MVP

Dr. Steven King Well-Known Member

Dr. Steven King Well-Known Member

Sicknote Active Member

Does gout have a venous origin?

Does Patient-Reported Outcome Measures Use at New Foot Patient Visits Improve Patient Outcomes?

Who does research on hallux valgus?

Fatigue does not affect foot orthotic function

The abductor hallucis muscle ;what does it do ?

Does the pilgrimage increase the podiatry risk in diabetic patients?

Why does my foot hurt?

Share This Page