Anatomy

Bicycle-specific requirements – Athletics

Special conditions while pedaling

Areal

Das erfüllte Bewegungsausmaß der Gelenke ist bei der Tretbewegung überschaubar. Am äußeren Ende des Kurbelarms befindet sich die Umlaufbahn der Pedalachse. Auf der dreht sich der fixierte Schuh – radial zum Drehmittelpunkt (Tretlager) – im Kreis. Bei einer 175mm Kurbel hat dieser Kreis einen Durchmesser von 35cm.

Die vorliegenden Maße, Ausmaße, Abstände und Umstände beim Radfahren sind also relativ nüchtern und überschaubar.
Es werden also wahrscheinlich keine großen Überraschungen während des Pedalierens zu erwarten sein….

Genauigkeit

Einzig das Aus- und Einrichten der Pedalplatten steht diesen repetitiven Grundvoraussetzungen im Weg, und zwar ordentlich!
Auf dieser gleichbleibenden, permanent wiederholten Tretbewegung können sich Symptome einschleichen. Vor allem, wenn die Einstellungen unsachgemäß sind. Damit sich eben keine Symptome weiterentwickeln können, ist eine mangelhafte Pedalplattenposition zu verhindern!

Cleat Setup-Einstellung der Pedalplatten

Die Cleats sollten immer perfekt installiert werden, denn mit der idealen Passung zwischen Fuß-Schuh und Pedal werden Ineffizienz und Verletzungen vermieden.
Induzierte Kniebeschwerden, ein schwammiges Trittgefühl und erhöhte Spannungen rund um das Sprunggelenk und eine Etage höher: im Knie haben somit keine Chance.

Das Optimieren vom Hot-Spot Pedal macht Sinn!

Feet shapes in Europe

Foot steps

Bigfoot

Die Fußform variiert nicht nur durch Belastung, Körpergewicht und Alterung, sondern durch ihre typische Ausprägung.

Zehenlänge und Zehengeometrie lassen den Fuß in 4 typische Formen einteilen.

Egyptian foot

The big toe is the longest, the others get evenly shorter.

The Egyptian foot shape goes in an even line from the inside (medial) to the outside (lateral)

Greek Foot

The second toe is the longest, the others are shorter.

The Greek foot shape has 2nd toe as the longest

Roman Foot

The first three toes have the same length, the two outer toes are shorter

The Roman foot shape goes in an even line from the 1st to the 3rd, each of the 4th and 5th is shorter

German Foot

Besides the big toe, all others are in the same length

The Germanic foot shape has an even, straight line – from the inside (medial) to the outside (lateral).

Or is it called a farmer’s toe or even a Celtic foot shape?

Human & Bike

HALLUX VALGUS

PEDAL AXIS

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ANATOMY

Bone structure of the foot

5 Metatarsals

The five metatarsal bones are relevant for the pedal cleat position, they deliver the central structure of the foot.
In ortopedic language they are named as “ossa metatarsalia” (Latin). The individual metatarsal bones are numbered from the inside to the outside, i.e. from the big toe to the little toe: Os metatarsale I to V.

The first and inner metatarsal bone (Os metatarsale I) is connected to the big toe, the little toe forms the fifth and outer toe (Os metatarsale V).

Each metatarsal bone has the same anatomical structure (head, body and base)

Pedal and bike

The metatarsal I+V points are in focus
The area between them defines the spot of the pedal axle

Setting by anatomical conditions.

The personal foot-fingerprint is a result by their optimum position on the pedals

MTP – METATARSOPHALANGEAL

The front center of the foot consists of 5 metatarsal bones (ossa metatarsalia). Localized in the caput, the metatarsal caput is located in the joint of the bone.

The metatarsophalangeal joints are given numbers from 1-5 for orientation.
The medical designation is given Roman numerals from I-V.

Example:
The metatarsophalangeal joint is the MTP joint (metatarsophalangeal joint) of the first toe ray, hence MTP-1.

BONES – FOOT

Together with the calcaneus, the two MTPs form a stable surface in the shape of a triangle. These 3 edges represent the points of support of the foot.

However, the real footprint has a much larger support surface which is created by the existing soft tissue.

LIGAMENT STRUCTURE

The ligament apparatus secures this foot shape. It fundamentally defines the footprint. If this apparatus is somehow overstretched, the structure will not return to its architectural shape. Permanent foot deformities will remain.

Bio-Ergo-nomy

Anatomy – Bio-Position

MTP1 and MTP5

The foot consists of 5 metatarsal bones (ossa metatarsalia) in the front center. These are localized at their so-called caput. The prominent caput of Os metatarsale 1 (on the inside of the foot behind the big toe) is the inner bony support point;
The caput of Os metatarsale 5 (on the side of the little toe) is the outer bony support point.

Together with the tuber calcanei on the heel bone (calcaneus), they form a support surface in the shape of a triangle. These are the support points of the foot skeleton. The footprint itself has a much larger support surface, which is created by the soft tissue present.

The ligamentous apparatus secures the shape of the foot, it is indefatigable and fundamentally defines the footprint.
If this ligamentous apparatus is overstretched, the foot structure can no longer return to its original shape. Foot deformities have their cause here

Einstellung der Cleats

Individuelle Ausrichtung der Cleats mittels Sablona

Das V-II-A-KONZEPT baut ganz selbstverständlich auf anatomische Grundlagen auf, es ist durch den Bezug auf die individuellen Begebenheiten und der zu erreichende Cleat-Einstellung zweifellos.

Die eingenommene Fußstellung mit der eben typischen Ausrichtung der Zehen will am Pedal eingeklickt, unbedingt wiedererkannt werden.

Anatomy - Bio-Position

V-II-A gait analysis

The natural foot position determines the alignment of the cleats. A distinction is made between three orientations – rotated outwards (V) or inwards (A) and parallel (II).

If you look at your own feet from above, you may recognize your individual anatomy

By analysing your gait, observing your own tracks in the sand, recognizing wet footprints on the tile floor, visualizing the running track in the snow or mud, the preferred foot position can be visualized.

If the heels are closer together and the toes are further apart, they are in a V-shape.

If the two imaginary lines between the metatarsophalangeal joint and the inside of the heel are almost parallel, they are in parallel style (II).

If the toes point towards each other and the heels are further apart, they are internally rotated in A-style.

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