Patent Application
20160021942
This application claims the benefit of priority under 35 U.S.C. § 119 of French patent application no. 1457061, filed Jul. 22, 2014, the entire content of which is hereby incorporated herein by reference, in its entirety and for all purposes.
The present disclosure relates to a type of athletic wear, in particular clothing for downhill skiing, and more specifically competitive downhill skiing. To be more particular, it is a form-fitting or nearly form-fitting type of clothing, intended to cover the lower limbs and designed to optimize muscular performance.
Generally, the practice of the sport can be improved in certain aspects by using appropriate clothing.
Thus, it is common knowledge that muscular effectiveness can be increased by using clothing which includes zones that provide specific compression for the muscles that they cover. Examples of such clothing are described in documents US 2013/0111646 and WO 2012/114209.
The clothing described in these documents has the advantage of putting the muscles in a state of pre-stress, which limits the risk of injuries, particularly those caused by rapid elongation of the muscles. However, when practicing downhill skiing and in particular competitive downhill skiing, the skier's position is such that his knees are folded at an extreme angle, which corresponds to a highly specific configuration for which the clothing described in the above mentioned documents does not provide any particular advantage.
There is thus a specific requirement for clothing that provides pre-stress for practicing downhill skiing and particularly competitive skiing.
Thus, the Applicant has designed a type of clothing for practicing downhill skiing which covers the lower part of the torso and the lower limbs and which includes various zones made of textiles with different elasticities.
This type of clothing is characterized in that it includes a pair of bands of the first type with a lower level of elasticity. Both these first type of bands extend from the interior of a thigh and pass above the anterior part of the thigh, approximately at the level of the iliac crests, and up to the area in the proximity of the lower lumbar vertebrae. These bands are symmetrical in relation to the median plane of the clothing.
In other words, the disclosed embodiments involve the creation of a piece of clothing which includes a special zone where the elasticity is lowest, thus ensuring compression, and which has a specific geometry. To be precise, this zone begins on the anterior surface of the thigh and extends straight upwards, partially covering the sartorius muscle. This zone then extends along the external surface of the thigh, above the iliac crests, and then envelopes the pelvis up to the lumbar region. In a first form of embodiment, these bands do not reach the spinal column, but are separated by a region of stronger elasticity. In another form of embodiment, both bands can connect at the spinal column and form a continuous band following a symmetrical configuration from one thigh to the other.
Thus, during the specific movements that are observed in downhill skiing in which the legs are highly bent, and the torso is inclined towards the front, this characteristic zone comprised of two bands of the first type is placed under stress, and thus exerts a high level of pressure on certain muscles of the thigh, particularly the Sartorius muscle, as well as the gluteus medius and multifidus muscle in the lumbo-pelvic area.
This additional applied pressure improves proprioception, as well as the balance between the stresses observed in the lumbo-pelvic area and in the thighs, when the skier is in his or her characteristic position. These bands also limit the lateral rotary movements of the thigh muscles.
To ensure the full effectiveness of this low elasticity zone, in particular during the flexion of the knees, this band of the first type may extend to above the knee. In a particular stance, it can bend below the kneecap. Similarly, the effectiveness can be improved via a configuration for this band of the first type in which the aforesaid band is wider at its ends, near the lumbar vertebrae zone, so as to distribute the stress in this region during the flexion of the torso.
In an advantageous method of execution, the clothing may also include bands of a second type, which are even less flexible, which extends downwards from the top of the anterior zone of the thigh, passing over the antero-external part of the thigh. Thus, this band of the second type covers the external part of the quadriceps, which is subject to more intense stress when the skier experiences vibrations or impacts due to the trajectory on surfaces that are not perfectly flat. To be more precise, this band of the second type may pass straight from the vastus lateralis muscle and thus reduce the balancing movements of this muscle; this results in the improvement of balance and control in the legs during the curves in the track. This band of the second type may extend below the kneecap, where it may join the band of the first type on the same thigh in a particular form of execution. Advantageously in practice, this band of the second type can start at the top straight from the upper part of the sartorius muscle on which the band of the first type already passes. The zone marked by these bands of the first and second type at the level of the thigh encircles and assures the compression of the rectus femoris muscle which acts to extend the knee and bend the thigh, during the repeated phase of repetitive curves that occurs when the skier is moving on the snow.
In practice, the compression effect exercised by the characteristic bands is measured by a differential pressure of at least 25% compared to the more elastic zones of the clothing. This pressure at the characteristic bands is measured at between 12 and 15 mm Hg, while the pressure exercised in the other regions of higher elasticity is rather lower at 8 mm Hg. The different parts of the fabric can be juxtaposed with each other by sticking or sewing. It is also possible to attach characteristic bands in superposition on a more elastic piece of clothing that covers the entirety of the thighs and the pelvic region.
The textiles used are more elongated in the warp direction than the weft direction, in order to preferably allow elongation of the clothing width-wise more than its elongation length-wise.
The presently disclosed embodiments, as well as the resulting advantages, shall be made clear through the following description of the method of manufacturing the fabric, as well as through the figures.
As shown in
Naturally, the clothing can extend to the lower part of the legs. Insofar as this region does not directly concern the disclosed embodiments, it will not be described in detail. It may also extend upwards, covering the chest, and include braces if required.
The clothing is made by assembling parts and allows the body of the skier to be effectively covered.
In accordance with the presently described embodiments, the clothing includes bands (10) and (20) which present a lower level of elasticity than the rest of the clothing. To be precise, the different textiles used for the clothing can be polyamide-based or in particular nylon®-and spandex-based, with a global mass of, for example 200 g/m
The elasticity measurements carried out on the least flexible textile, in accordance with the standard UNI EN 14704-1, resulted in elongation at 3.6 kg force between 85 and 115%, typically 100% in the transversal direction. The elongation at a force of 3.6 kg means a value between 51 and 69%, typically 60% in the longitudinal direction. Similarly, the measured shape, at 40% elongation is between 455 and 845 gram-force (gf), and typically in the vicinity of 650 gf in the transversal direction, and between 840 and 1660 gram-force (gf), and typically in the vicinity of 1200 gf in the longitudinal direction.
As regards the most elastic textile, the same tests show transversal elongation between 208 and 282%, typically in the vicinity of 245%, and in the longitudinal direction between 187 and 253%, typically in the vicinity of 220%.
Equivalent tests show a force measured at 40% of elongation in the transversal direction for a value between 210 and 390 gf, approximately 300 gf, and in the longitudinal direction for values between 175 to 325 gf and typically approximately 250 gf.
As shown in
This band (10) extends upwards and widens; it then passes from near the iliac crests, as shown in
In a particular method of execution which is not shown here, the path of the band of the first type may then be extended by a symmetrical band and reach the lower part of the opposite knee, and thus form a continuous band from one knee to the other.
Additionally, the clothing also includes a band of the second type (20), which starts, as shown in
Naturally, the two legs of the clothing each have one band of the second type (20). The bands of the first type are connected by at least one polymer film band (3133), which is typically polyurethane-based superposed and stuck to the most elastic textile, which allows limiting the transversal spreading between the two bands (10, 20), and thus helps better contain the muscles. A similar band of film (35) can be used to connect the two bands of the first and second type below the knee.
Additionally, the clothing can include zones (40) which are made using different textiles and present a higher rate of transition, thus allowing the diffusion of heat in the fold of the knee.
Similarly, the zone (50) covering the kneecap can be made using a different part, helping it adjust to the shape of the knee.
As a consequence of the above, the clothing, in accordance with the disclosure, presents multiple advantages, in particular that of containing the thigh muscles, which are heavily used when the skier is in a bent position.
These thigh muscles are joined to the muscles of the lower back and in particular to increase the support to the lumbar area. They help improve the sensation of responsiveness and ensure the rapid contraction of the muscle. This results in better traversing of the curves in the track, and thus an improvement in the skier's performances. Similarly, such support to the muscles allows better recovery from fatigue and limits the risk of muscular injuries.
| Number | Date | Country | Kind |
|---|---|---|---|
| 1457061 | Jul 2014 | FR | national |
