Form fundamentals
Back Angle
How flat or upright your back is relative to horizontal.
Healthy range: ~40–55° back angle from horizontal (endurance)
What good looks like
What it is
Back angle is your torso's tilt from horizontal: low/flat is aerodynamic and aggressive, upright is comfortable but slow. The right answer depends on your goals and flexibility.
Why it matters
Going lower than your flexibility allows overloads the lower back and neck; staying too upright sacrifices speed and can put more weight on the saddle.
How we detect it
We measure the angle of the hip-to-shoulder line against horizontal (median across the clip). ~40-55° is a comfortable endurance range.
How to fix it
Tune bar height with spacers and stem length, and build hamstring and lower-back flexibility before committing to a lower position.
Recommended drills
- •Raise bars / shorten stem if over-flat
- •Lower bars / longer stem if too upright
- •Hamstring & lower-back mobility
Run these 2-3x per week. Expect to feel a change in form 4-6 weeks in.
Common symptoms when this is off
Lower back painNeck/shoulder strain