What Systematic recommends
Where to start
- A wall. A pair of shoes. Bare feet. Place the shoes with their heels against the wall, about shoulder-width apart. Stand barefoot with your heels touching the toes of the shoes.
- Place one hand gently on your stomach and one on your chest to help keep your torso neutral. Maintain a neutral spine throughout the movement. Keep full tripod-foot contact with the floor. Keep the knees slightly soft rather than fully locked. Avoid letting the knees bend excessively. Push the hips backward toward the wall as the shoulders move forward and down. Keep the torso stable as you hinge. Return to standing by bringing the hips back over the feet.
- 3 sets of 3–5 repetitions. Take a short walk between sets. If you feel discomfort, confusion, or apprehension, reassess. Keep the movement easy and comfortable.
Condensed from the published Development Pathway (The Toe Touch Screen: Wall-Supported Hip Hinge). This is a starting point, not a training program or medical advice.
What the toe touch reflects
Systematic's Toe Touch Screen is its flexibility test. It treats the toe touch as an integrated forward bend rather than an isolated hamstring test.
Three things drive the result. How the lumbar spine and pelvis share the bend with the hips. How extensible the tissues along the back of the body are. And movement strategy, meaning how you organize the motion to reach the floor while meeting the test's knee and tempo standards. Systematic also looks at whether you can complete the movement at all.
Studies of the toe touch itself found that people with shorter hamstrings move their pelvis less during the test, which changes how the bend is spread through the trunk.
How forward bending changes with age and task
A forward bend is spread from the upper back down through the lower back to the pelvis and hips. Research on this lumbopelvic rhythm shows that how much the lower back and pelvis contribute varies with age, the task, fatigue and a history of pain.
Flexibility and arterial stiffness
One cross-sectional study of 526 adults split each age group (20 to 39, 40 to 59, 60 to 83) into poor- and high-flexibility groups using a sit-and-reach test.
Middle-aged and older adults with poor flexibility had stiffer arteries than those with high flexibility. In the young group there was no significant difference. That is an association at one point in time, not cause and effect. Sit-and-reach is a different test from the Systematic toe touch, and a toe touch result is not a measure of how healthy your arteries are.
In this capacity
The evidence
Each cited source is labeled according to how it supports the particular claim on this page. Direct test evidence, underlying-capacity findings and population reference values are distinguished from Systematic-defined protocols and standards. Historical development notes are retained internally rather than presented as public evidence. A study of an underlying capacity is never presented as validation of the Systematic test itself.
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Underlying-capacity evidence New source
Yamamoto et al. (2009). Poor trunk flexibility is associated with arterial stiffening. American journal of physiology. Heart and circulatory physiology.
What it found. Among 526 adults, those with poor sit-and-reach flexibility had stiffer arteries in the middle-aged and older groups; there was no significant difference in young adults.
What it does not show. It is cross-sectional, so it does not show cause. Sit-and-reach is not the Systematic toe touch, and a toe touch score is not a vascular-health measure.
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Direct test evidence
Gajdosik et al. (1994). Influence of hamstring length on the standing position and flexion range of motion of the pelvic angle, lumbar angle, and thoracic angle. The Journal of orthopaedic and sports physical therapy.
What it found. Shorter hamstrings reduced pelvic motion and changed how the bend was distributed through the trunk during the toe-touch test.
What it does not show. It studied a toe-touch task, not the exact Systematic protocol, and does not set any Systematic standard.
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Underlying-capacity evidence
Vazirian et al. (2016). Lumbopelvic rhythm in the sagittal plane: A review of the effects of participants and task characteristics. International Musculoskeletal Medicine.
What it found. Forward bending is shared from the upper back down to the hips; the lower back and pelvis contributions vary with age, task, fatigue and pain history.
What it does not show. It does not validate a Systematic score or link flexibility to mortality.
The Systematic Healthspan Assessment is a physical baseline. It is not a diagnosis, and it does not estimate a biological age, a disease risk or a lifespan.