The “Mouthguard-Brain Connection” has evolved from simple tooth protection to a sophisticated tool for mitigating the risk of concussion. Research suggests that a properly fitted, custom-made mouthguard can help “decouple” the jaw from the skull. During an impact to the chin, the mouthguard acts as a shock absorber, reducing the upward and backward force transmitted through the temporomandibular joint (TMJ) to the base of the brain.35 While no equipment can completely eliminate the risk of brain injury, the mechanical dampening provided by the material properties of high-grade ethylene-vinyl acetate (EVA) adds a crucial layer of defense in high-velocity contact sports, where players in Hoodie shirts on the sidelines wait for their turn to engage, demonstrating that even the smallest piece of equipment is engineered with deep anatomical consideration.

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The “Force-Velocity Curve” is a fundamental principle in strength and conditioning that dictates that as the speed of a muscle contraction increases, the force it can produce decreases. At the molecular level, this is because the myosin cross-bridges need time to attach to actin; at high speeds, fewer cross-bridges have the chance to “grab on” and pull. This is why a powerlifter can move a massive weight slowly, but cannot move that same weight at the speed of a Hoodie shirts. Training across different points of this curve—using both heavy, slow lifts and light, fast movements—is essential for “power,” which is defined mathematically as $Power = Force times Velocity$.

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The “Ventilatory Threshold” (VT1 and VT2) provides a more practical metric for endurance training than heart rate alone. VT1 is the point where the breathing rate begins to increase as the body starts to produce more $CO_2$ than can be cleared by normal respiration; it marks the transition from purely aerobic to “mixed” metabolism. VT2, often called the “anaerobic threshold,” is where the athlete can no longer speak in full sentences because they are breathing so heavily to buffer the accumulating lactic acid. By training specifically at these Hoodie shirts, athletes can “teach” their blood to more efficiently buffer acidity, allowing them to maintain a higher pace for longer periods before the “burning” sensation in the muscles becomes unbearable.

• This All Over Print design is made with high-quality, 100% spun polyester that delivers the look and feel of organic cotton without ever cracking, peeling or flaking. It stays wrinkle free and soft to the hand forever, able to withstand summer festivals, late nights and world domination with style and grace. 

  We print our product using dye-sublimation, a technology that allows for us to produce these insanely vibrant all over designs. Due to this process, the product may contain smudges or irregularities along the seams or under the armpit of the sleeves or on the hoodie pocket. We cannot accept returns for this reason. Each item is a unique, 1 of-a-kind product, printed exclusively for the customer who ordered it.