The Fixed Firm pose is a traditional seated or kneeling posture, similar to the preparatory pose Vajrasana (Thunderbolt Pose). The key difference is that in Vajrasana, you sit on your heels; in the Fixed Firm pose, you kneel on the floor with knees close together, feet apart, and sit down between your feet, keeping your spine straight and your hands on your thighs. This posture requires and simultaneously builds a very strong "fixed" foundation.

As she approached the 20-minute mark, Kateřina noticed that her breathing was getting slightly labored. She decided to pick up the pace, pushing herself to finish strong. With a final burst of energy, she sprinted toward the finish line – a large oak tree that marked the end of her route.

Whether you find the original recording or follow this reconstructed script, the principles remain sound. “With S fixed” is not a gimmick; it is an essential biomechanical concept. After performing this 45-minute routine for 4 weeks (3x/week), users report:

Hartlová’s “23 11 12” exercise likely targeted while eliminating compensations. The modifier “with s fixed” means: performing each asana with a conscious maintenance of neutral spine, engaged transverse abdominis, and fixed scapular position.

: Move only from the mid-back and neck. This isolates the thoracic spine while keeping the lumbar "fixed" and protected. 2. Stabilized Bird-Dog This is a staple of the Hartlova method.

The S-Posture, practiced consistently with attention to pelvic neutrality and core engagement, can help a 13-year-old like Katerina develop better posture, spinal mobility, and shoulder control. Emphasize slow progression and safety.

These numbers could potentially represent a date (November 23, 2012 or December 11, 2023) or a specific set sequence in a fitness routine. However, a search for "Katerina Hartlova November 23" or "Katerina Hartlova 2012 exercise" does not return significant results. It is possible that "23," "11," and "12" refer to repetition counts or durations for specific JOGA movements.

Rise to Tadasana, feet grounding like twin pillars. Raise the arms, fingertips tracing an invisible “S” above the head. The shoulders roll back, the heart opens—yet the central line of the body stays straight, unbowed.

If you would like to customize this routine further, let me know:

When a yoga or deep stretching routine incorporates a "fixed" element, the physiological focus shifts from dynamic balance to deep tissue isolation and structural decompression. This style of physical exercise yields specific biomechanical benefits: 1. Isolate Core Muscle Groups

As of 2026, Katerina Hartlova is 40 years old. She began her professional modeling career in 2004 at the age of 19. Her physical dimensions, often cited as with a height of 170 cm , have been a significant part of her public image. Interestingly, various sources list differing physical measurements; while many Chinese media sources quote the 34DD-25-37 (170cm), Western sources like Wikipedia list her height as 5 feet 4 inches (approx. 163 cm) with a 36G bra size. Nevertheless, these figures highlight a physique that is both curvaceous and athletic, lending itself well to physical activities like yoga or JOGA.