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Junior Tennis | My Child is Strong in Practice but Freezes in Crucial Match Moments
English version is here / 日本語版はこちら In the harsh competitive environment of junior tennis, there is a common wall you encounter during a specific stage. It is the period when players break out of a slump and finally start to produ... -
Junior Tennis | Analysis Log: The Fallacy of Free Fall — Active Sink via Gravity Drive, Not Relaxation
English version is here / 日本語版はこちら The Trap of Free Fall In the field of junior development, when lowering the racket, the instruction to relax your power and use the weight of the racket and arm is frequently employed. At first ... -
Junior Tennis | Analysis Log: The Truth of Ground Reaction Force — Energy Insulation via Toughness Control
English version is here / 日本語版はこちら In the field of junior development, instruction is often given to strongly kick the ground to gain power. However, this stems from a difference in interpretation caused by a difference in resolu... -
Junior Tennis | Dissecting the 48-Year-Old Physical OS: The Technique of Embodying Toughness Through Physics, Relying Not Solely on Muscle Strength
English version is here / 日本語版はこちら In the previous article, we defined tension and toughness in tennis. So, how does the body of the person advocating this—myself (48 years old/as of 2026)—actually operate on the court? This time... -
Junior Tennis | Making a Difference After the Shot: Intentional Recovery to Return via the Shortest Path Without Losing the Axis
English version is here / 日本語版はこちら In tennis, the recovery movement after the shot is just as vital as the act of hitting itself. The key to preparing powerfully for the next move is transforming the transition from the finish to... -
Junior Tennis | Define Your Own Sweet Spot (Not the Manufacturer)
English version is here / 日本語版はこちら You likely hear the phrase hitting the sweet spot often. But where exactly is this spot located? Standards of the Sweet Spot The conventional sweet spot is generally considered to be the center ... -
Junior Tennis | Dominating the Ball through Pressure Control of Felt and Core during Shot Conversion
English version is here / 日本語版はこちら In the world of Junior Tennis, heavy topspin is the current trend. While it is relatively easy to return balls with similar rotations, errors spike when attempting a Conversion of Action, such a... -
Junior Tennis | Complete Sync of Tempo to Prevent Rally Collapse: Temporal Calibration with the External Environment
English version is here / 日本語版はこちら The primary cause of form collapse during rallies is a temporal bug. This article debugs the essential concepts that must be installed into the biological OS to maintain the execution speed of o... -
Junior Tennis | The Inverse Proportion Law of Consciousness and Form: The Counter-Protocol to Eliminate Center of Mass Core Collapse
English version is here / 日本語版はこちら In the junior tennis development environment, there is a phenomenon where the player's output (shot power) suddenly attenuates or abrupt mishits are repeated. When debugging this phenomenon from... -
Junior Tennis | Purge the Illusion of Flexing: Redefining the Kinetic Chain via the Seamless Unit
English version is here / 日本語版はこちら The language of a whip-like kinetic chain or flexing the body has long been deified in the tennis world. However, when debugged from the perspective of an Architect, this functions as a fatal vi...
