Kai MATSUBA

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Leg Lowering【Explanation】

Within the Performance Treasure Map (PTM) and its Original K-Map, this article explains the rationale behind selecting leg lowering as a method to achieve core co-contraction and a neutral pelvic position. We will unpack the principles of joint mechanics and core stabilization to provide a comprehensive understanding of this approach.
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Front Squat 【Explanation】

This is an introduction to the strength training component of the Original K-Map, the first model created using the concept of the Performance Treasure Map. In this blog, we highlight the importance of the front squat, its proper procedures, and key points to consider when performing it.
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Dead Bug【Explanation】

What is the dead bug exercise? It is an exercise designed to increase intra-abdominal pressure and enhance stability in the sagittal plane, ultimately contributing to improved performance in activities such as jumping and sprinting. By unraveling the principles of joint and core mechanics, we will explain the correct technique and key points with accompanying video demonstrations.
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Draw-In【Explanation】

What is drawing-in? It refers to an exercise where you gradually pull in your abdomen while exhaling, increasing intra-abdominal pressure. This article unpacks the principles of breathing and the core (inner unit), explaining the differences between drawing-in and bracing, as well as its connection to lower back pain.
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Crocodile Breathing【Explanation】

Our most primitive and foundational movement pattern is breathing. This article delves into the principles of breathing and examines its connection to compensatory movements often observed during squats, known as ECSS (External Core Stabilization Strategy), as well as its relationship with Open Scissors Syndrome. We also provide a detailed explanation of the correct techniques, supported by video demonstrations.
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90/90 Breathing【Explanation】

"Those who master breathing, master movement." Breathing, our most primitive and foundational movement pattern, holds the key to understanding the principles of human motion. This article explores the connection between breathing (bracing) and performance, unraveling the mechanics of increasing intra-abdominal pressure. We will also provide a detailed explanation of the correct techniques, accompanied by video demonstrations.
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Back Squat (Low Bar / High Bar)【Explanation】

This is an introduction to the strength training component of the Original K-Map, created using the concept of the Performance Treasure Map. In this blog, we delve into the importance of the back squat, its procedures, and key points to keep in mind when performing it.
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Movement Preparation【General Principle④】

What is Movement Preparation? It refers to exercises aimed at building a foundation for improving movement quality, such as activating muscles, proprioception, and the nervous system, as well as mastering movement patterns. Since "movement" is a key determinant of good performance and conditioning, this article will introduce the principles and fundamentals of exercises that serve as preparation for it.
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Respiration【General Principle③】

What is proper breathing? Diaphragmatic breathing? Thoracic breathing? Drawing in? Bracing? Various breathing methods are being discussed these days, but understanding how the ribcage and diaphragm move during breathing is key to comprehending correct breathing techniques. In this article, we will introduce the functions of the joints and muscles involved in breathing.
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Core【General principle②】

In training instruction, terms like "core," "inner unit," and "outer unit" are frequently mentioned. While there are various definitions, this blog defines them as the Lumbo-Pelvic-Hip Complex (LPHC), encompassing the lumbar spine, pelvis, and hip joint.
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