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Petersham is utilized in couture sewing as a form of interfacing as way to stabilize waistbands. [2] Petersham is very similar to grosgrain ribbon in appearance: both have closely spaced horizontal ridges, but Petersham has a flexible picot edge allowing it to be shaped with an iron, whereas grosgrain cannot be shaped this way. [3]
A close-up of a piece of grosgrain ribbon. Note the ribs that go across the ribbon. Grosgrain ribbons in various colors and widths. Grosgrain (/ ˈ ɡ r oʊ ɡ r eɪ n / GROH-grayn, [1] also sometimes / ˈ ɡ r ɒ s ɡ r eɪ n / GROS-grayn) is a type of fabric or ribbon defined by the fact that its weft is heavier than its warp, creating prominent transverse ribs.
Hack squat machine. The squat is performed by squatting down with a weight held across the upper back (below the neck) and standing up straight again. This is a compound exercise that also involves the glutes (buttocks) and, to a lesser extent, the hamstrings, calves, and the lower back.
With respect to the body, the weight is instead held over the head rather than over the face [clarify]. As with all weight training movements, it is important to keep the weight under smooth control on both the way down and the way up. This exercise can be performed standing, sitting or lying on one's back.
A header is a technique that is used in association football to control the ball using the head to pass, shoot, or clear. This can be done from a standing, jumping, or diving position. [1] Heading is a common technique and is used by players in practically every match.
Open chain exercises are postulated to be advantageous in rehabilitation settings because they can be easily manipulated to selectively target specific muscles, or specific heads of certain muscles, more effectively than their closed chain counterparts, at different phases of contraction.
The exercise is completed by contracting the back (erector spinae muscles) and raising the torso so the body is in a straight line from head to heels. The exercise can be enhanced by holding weights to the chest. Lighter weights may be used to begin with to prevent straining the back muscles with over-exertion.
Closed chain exercises are often compound movements, that generally incur compressive forces, while open-chain exercises are often isolation movements that promote more shearing forces. [ 1 ] CKC exercises involve more than one muscle group and joint simultaneously rather than concentrating solely on one, as many OKC exercises do (single-joint ...