A fire burning in water—therein lies the tension of this idea. Two mutually exclusive states suddenly no longer appear as opposites, but as conditions for each other. Fire represents power, pressure, and intensity. Water represents flow, adaptation, and continuity. And yet, it is precisely this paradoxical simultaneity that allows for something else: a movement that is neither rigid nor diffuse.

In the horizontal plane, gravity loses its dominance. No structure carries more than another; muscles, tendons, ligaments, and joints cooperate in a kind of biological democracy. The lateral wave—the undulating contraction along the spine—transmits kinetic energy segment by segment. The challenge lies in giving this flowing energy explosiveness. It is as if one were trying to ignite a fire in water. An antinomy—and yet it is precisely within this tension that the key to a higher form of efficiency resides. In the end, a simple truth remains: perfect movement creates a balance between release and absorption—a fire that burns in water. Plyometric effects help generate peaks of energy by allowing elastic structures such as tendons and fascia to store kinetic energy and release it explosively without interrupting the overall flow. In this way, a system emerges that is both powerful and fluid.

Lateral Force Flow and Vertical Compression

The way humans respond to pressure on their bodies has profound biomechanical consequences. In particular, the lateral flexion of the spine as a result of segmental muscle contraction plays a central role. While horizontal force flows are efficiently transmitted in these movements, vertical muscle activity often leads to compressions that interrupt force transmission.

Lateral flexion, in the coordinated contraction of individual vertebral segments, produces an almost ideal force flow in the horizontal plane. Forces are transmitted efficiently along the spine without blocking the joints. In the vertical plane, however, each contraction leads to a closing of the joints. This interrupts the transmission, amplification, and storage of energy in the body.

Under pressure, humans instinctively tend toward vertical stiffening—a protective response that stabilizes internal structures but severely limits movement efficiency. In self-defense situations, this means that fast and efficient techniques such as strikes, throws, or evasive movements become more difficult. Vertical compression acts like a biomechanical stopper that blocks the transfer of energy from the trunk to the extremities.

Wrestlers benefit from a semi-horizontal concept of force transmission. Their movements are predominantly diagonal or horizontal, which reduces vertical compression. Joints remain open, and force can be efficiently transmitted through the entire muscular chain—hips, trunk, shoulders. Under pressure, they absorb energy without losing mobility and deliberately use lateral flexion for stability and leverage. This explains why wrestling techniques are particularly effective in situations of high physical stress.

Plyometrics and Qi

Research into the experience of Qi encounters the problem that the phenomenological experience has no direct biological correlation. At the same time, biomechanics provides clues as to how the experience of energy flow can be explained through segmental muscle activity, fascial and tendon elasticity, tensegrity potentials, and plyometric effects. Lateral flexion along the spine forms the natural engine of horizontal movement. Segmental muscle contraction generates a wave-like motion that propagates along the spine, amplified by plyometric effects.

Plyometric Effects

Plyometrics refers to the ability of muscles, tendons, and fascia to rapidly return stored elastic energy. In the horizontal wave, this results in:

Mechanical: Segment-by-segment amplification of lateral flexion.

Electrical/neuromuscular: Activation of fast stretch reflexes and increased muscle fiber recruitment.

Hormonal: Release of adrenaline, noradrenaline, and endorphins.

The horizontal lateral flexion wave along the spine forms the natural engine of an efficient movement system. Segmental muscle contractions generate a wave-like motion that propagates along the spine, while joints serve as passive connecting elements that provide stability and neutralize pressure without storing or amplifying energy. Muscles provide force, stability, and pre-tension, while tendons and fascia absorb, transmit, and amplify elastic energy. Ligaments passively limit excessive translation and rotation. In the horizontal plane, the kinetic chain remains open, allowing the lateral flexion wave to flow freely, with amplification and energy absorption occurring largely automatically.

Plyometric effects enhance this amplification. They arise through eccentric stretching, activation of fast reflexes and increased muscle fiber recruitment, as well as hormonally through the release of adrenaline, noradrenaline, and endorphins.

Joints, ligaments, capsules, tendons, and fascia together form a passive structure that distributes forces, limits translations, and provides stability. This structure can be influenced through muscle development, biomechanical understanding, and targeted movement patterns. In this way, an invisible protective wall (wall of force) can be constructed in a modular fashion. Pre-tension in muscles and fascia, centering of joint surfaces, adaptive stiffness of tendons and ligaments, and coordinated breathing and core bracing optimize force transmission, stabilize the spine, and increase the efficiency of the lateral flexion wave.

Core bracing refers to the ability to build tension in the trunk that stabilizes the spine and transmits forces between the upper and lower body. It is not rigid tension, but a finely tuned interplay of deep muscle and connective tissue layers. The diaphragm lowers slightly, the pelvic floor lifts, the deep abdominal muscles wrap the trunk like an elastic corset, and the back muscles support the vertebral joints from within. This creates intra-abdominal pressure—a kind of hydraulic support that carries the body from within.

This internal stability makes it possible for movement and force flow to occur simultaneously. Joints remain open, energy is not blocked but transmitted through the kinetic chain. In this sense, core bracing can also be understood as the vertical counterpart to horizontal wave logic. While in water the lateral flexion of the spine creates stability, on land this occurs through the conscious activation of trunk tension. The body creates within itself a kind of artificial weightlessness—a dynamic center in which movement can circulate freely.

Core bracing is the means by which the body reconstructs the buoyancy of water within itself. It is the biomechanical translation of ancient horizontal intelligence into the vertical—the attempt to give the elastic, breathing lightness of the wave a form that does not fight gravity but integrates it. In this tension between uprightness and fluidity, movement becomes efficient, expressive, and effortless.

In the vertical plane, the principles that evolved in the horizontal are not automatically effective, as each contraction in upright locomotion narrows joint spaces, fragments force flow, and reduces amplification and storage. In addition, significant energy losses arise in the struggle against gravity for balance. Transferring horizontal principles to the vertical requires control, breath integration, and neuromuscular precision. Horizontal movement enables experiences of lightness, unimpeded force flow, and remarkable amplification. The specific form of exercise is secondary; what matters is biomechanical understanding. Awareness and controlled breathing are integral to the process.

To optimize the system, three biomechanical components work synergistically: muscles generate force, stability, and pre-tension; stretching reduces local overload; and cultivated fascia stores, distributes, and amplifies elastic energy particularly effectively. This collaboration stabilizes the passive structure, maximizes force flow, and enables efficient use of the lateral flexion wave. The horizontal wave thus forms the foundation of an integrative movement system that is mechanically, electrically, and hormonally modulated—and whose principles must be consciously transferred into the vertical.

Intuition Discovers the Principles, Consciousness Anchors Them

Only the conscious control of fascial and muscular pre-tension makes the body’s spontaneous intelligence reproducible. What was once a moment of lightness and power becomes a state that can be generated at any time.

This is the transition from talent to mastery. Intuition is the gateway, consciousness the structure, and practice the glue that binds them together. True mastery emerges in clarity. Conscious control and intuitive body intelligence merge. The body becomes once again what it originally was: a vibrating, resonant system that does not produce force, but allows it to circulate.

The Inner Framework – From the Horizontal Wave to Conscious Mastery

The movement of life began in the horizontal plane. Fish, early tetrapods, and worms used waves along their spine to move. This lateral wave, the rhythmic side-to-side motion of the body, was a masterpiece. Muscles, tendons, fascia, bones, and joints worked together in a dynamic tension unit that stored, transmitted, and amplified energy. In this original state, force flowed unhindered. Movement was a continuum, not a sequence of isolated actions.

In the vertical plane, conditions changed. Gravity demanded stability, the kinetic chain became segmented, and the freedom of horizontal movement transformed into a system of supports and counter-tensions. The ease with which force once flowed gave way to the necessity of balance. Yet the principles of the horizontal wave remained embedded—not merely as a memory, but as an architecture in which continuous force flow is still possible.

Verticality in the Horizontal Body – The Evolutionary Foresight of Joints

The idea that verticality is something entirely new, introduced only when the body rose upright on land, is a common misconception. In fact, the foundation for vertical force lines was already embedded in the horizontal body plan. Even early tetrapods, whose bodies were still horizontally oriented, possessed joints—elbows, knees, shoulders, and hips—aligned along vertical axes.

Joints did not only enable lateral flexion and fin movement; they simultaneously prepared the body for the load of gravity it would later have to bear in an upright posture. The vertical alignment of joints allowed forces to be transmitted efficiently along bone axes, even when the primary movement of the body was still horizontal and wave-like.

Only with the migration of fins beneath the body, their transformation into limbs, and the transition onto land—where body weight had to be fully supported—was this potential fully activated. But it did not need to be invented. The necessary axes and levers were already present. Lateral flexion of the spine remained, and the musculoskeletal and fascial architecture could continue to store, transmit, and amplify energy, while joints now also functioned as primary axes of support and compression.

Verticality is inherent within us; it is not a later construction but the logical continuation of a system that was, from the beginning, prepared to utilize gravitational forces without losing the dynamics of the horizontal wave.

Evolution moved toward verticality from the moment gravity became a relevant factor. And it is precisely this potential embedded in horizontal architecture that allows us today, through conscious alignment, skeletal control, and muscular integration, to reproducibly experience weight, stability, and amplification—a living testimony to the biomechanics inherent within us.

From the Horizontal Operating System to Verticality

Verticality is anchored in the horizontal body plan. Even the earliest vertebrates carried within their joints, bone axes, and musculo-fascial structures the prerequisites for vertical acceptance of gravity. This potential initially existed only as a seed, preserved over millions of years, yet it made it possible for the body one day to stand upright, bear weight, and distribute forces efficiently.

Aquatic tetrapodomorphs were fish-like animals that still lived in water but already exhibited characteristics of later terrestrial vertebrates. Individual bone axes were vertically aligned, joints structurally optimized, and tendons and fascia transmitted forces—without the need for a conscious control system. Lateral flexion, plyometric effects, and elasticity developed under partial unloading due to buoyancy. Movement was efficient, fluid, and resource-conserving.

When the first tetrapods began their amphibious transition onto land in the late Devonian period (around 370–360 million years ago) on Euramerica, their horizontal operating system was already prepared for verticality. Verticality was an evolutionary potential rooted in the horizontal operating system.