Back Extension on the T-BOW® on the T-Box®
Updated: Aug 16
Summary — Back Extension Basics on the T‑BOW® on the T‑Box® (Maja Tsirimokou)
1. Overview
- Advanced posture shown: for users with high mobility/flexibility and strong, stable core, shoulder girdle and neck.
- Provide adaptations for less‑skilled participants.
2. Three fundamental elements for correct backward lying on T‑BOW® (Sandra Bonacina)
- Ensure every vertebra contacts the bow.
- Maintain a straight line between neck and head.
- Ensure the sit bones (ischial tuberosities) touch the floor.
3. Additional precautions for T‑Box elevated back extensions on T‑BOW® (S. Bonacina)
- Use a second T‑BOW® beside the T‑Box® to support and align the neck when needed.
- If one leg is extended, keep the other drawn toward the abdomen to protect against lumbar hyperextension.
- For scissor/alternating leg actions, first draw both knees to the chest, then extend a single leg.
4. Benefits of the elevated T‑BOW® on the T‑Box®
- Frees space for the upper and lower body to hang, enabling correct hip‑to‑lumbar alignment.
- Increases hip‑flexor stretch and allows more precise vertebral contact with the bow.
- Alternating leg elevation reduces rotational inertia and improves vertebral adjustment accuracy.
5. Safety
- Avoid excessive cervical hyperextension; maintain safe neck alignment (young athletes may tolerate more but caution is advised).
-Keep the pelvis neutral and pull in the abdomen so all vertebrae contact the T‑BOW®; if you can’t, skip the box variation or perform it with both knees pulled to the chest.
6. Technical & therapeutic key properties
- Arch matched to natural lumbar lordosis (Classic 40°, Wood 45°).
- Prevents spinal sinking; provides mobilizing pressure to partially blocked vertebrae.
- Enables segmental vertebral mobilization (prone, supine, lateral) and safer abdominal strengthening through greater ROM.
- Promotes rapid, precise postural adjustments via high reactivity and single axis of instability.
- Wood model features glass microspheres for enhanced barefoot tactile feedback.
7. Applications
- Useable across therapy, daily activities and sport contexts for all ages and performance levels, with appropriate progressions.
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Back Extension Basics on the T-BOW® on the T-Box®
by Maja Tsirimokou
The photo above shows an advanced posture suited to individuals with high mobility/flexibility and a strong, stable core, shoulder girdle, and neck. Adaptations for less‑skilled participants should be provided.
Sandra Bonacina (professor of physiotherapy at the University of Zurich and inventor of the T‑BOW®) identifies three crucial elements for correct backward lying on a T‑BOW® placed on the floor:
Ensure every vertebra contacts the bow.
Maintain a straight line between neck and head.
Ensure the sit bones (ischial tuberosities) touch the floor.
When performing back extensions with the T‑BOW® placed on the T‑Box®, take these additional precautions (S. Bonacina):
If the neck is not initially aligned, place a second T‑BOW® beside the T‑Box® and adjust its height to support proper cervical alignment.
If one leg is extended, bring the other leg closer to the abdomen to protect against excessive lumbar hyperextension.
When alternating leg positions (scissor action), first draw both knees to the chest, then extend a single leg.
Avoid letting the pelvis tilt forward; pull in your abdomen as much as possible to ensure all vertebrae make firm contact with the T‑BOW® mat. If you cannot, do not perform the exercise on the box — or do it only with both knees pulled to the chest (yoga child’s‑pose variation).
An extra T‑BOW® on the T‑Box® allows precise neck positioning and facilitates a healthy, full‑spine extension.
The video illustrates an advanced variation:
The elevated T‑BOW® gives space for the upper and lower body to hang, enabling proper hip‑to‑lumbar alignment and greater hip‑flexor stretch during leg lowering. Alternating leg elevation reduces rotational inertia on the spine and allows more precise vertebral contact with the bow.
Avoid excessive cervical hyperextension; although some young athletes may tolerate it, maintaining safe neck alignment is strongly recommended.
Find more options in this article (Optimizing T-BOW® training with the T-Box®):
Kinesiological Adaptation to Natural Lumbar Lordosis: the T-BOW®, Unique on the Market:
Tips of Backward Lying on the T-BOW® by Sandra Bonacina:
Arch Adapted to the Spine's Natural Anatomical Lumbar Lordosis
a. Lying backward on the T-BOW®—thanks to its high proprioceptive sensitivity—prevents the spine from sinking, allowing partially blocked vertebrae to receive mobilizing pressure that promotes natural anatomical lumbar lordosis.
b. Therapeutic segmental strengthening and mobilization of vertebrae while lying prone, sideways or supine.
c. The T-BOW® enables strengthening the abs while maintaining a stable anatomical-structural lumbar lordosis and through a greater range of motion than a flat surface.
d. Thoracic back extension, moves from kyphosis toward lordosis, staying within the T-BOW®'s 40-45-degree limit.
45-Degree Arch for the Wood T-BOW®
40-Degree Arch for the Classic T-BOW®
Typical Profiles · Cobb Method
* Thoracic Kyphosis
20-40 degree arch
* Lumbar Lordosis
40-50 degree arch
Very Quick and Precise Postural Adjustment
The T-BOW®'s curved design, high reactivity, lightweight and single axis of instability promote high proprioceptive sensitivity, enabling very quick and precise postural adjustments.
* On concavity, convexity and narrow edges.
* In stable and unstable situations.
* Barefoot and with sport shoes; and with socks on the wooden version.
* Coordination and balance applicable in therapy and daily and sport activities, for all ages and performance levels.
* Deep joint stabilization & healthy back.
* Glass microspheres in the Wood T-BOW® greatly enhance tactile precision and responsiveness for barefoot use.
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