Zero drop — what it changes
The number you have never heard of in a shoe spec — and the one that quietly shapes your knees, hips, and lower back.
"Drop" is the height difference between the heel and the forefoot of a shoe. Most everyday shoes have 8–12 mm. Many running shoes have more. A barefoot shoe has zero: your foot lies flat, as it would on the ground.
Why the number even exists
High heels help the shoe absorb impact and "assist" the step. That sounds great in marketing. In practice it means: the shoe is doing the job the muscles of your foot and calf should be doing. They then weaken.
How a raised heel changes the body
A raised heel tilts the entire kinetic chain forward. To stay upright, the body compensates — the pelvis tilts, the lower back curves a little more, the knee takes the load. It is quiet work, but repeated with every step, every day, for years.
Zero is the default state
With zero, your foot lies flat. Ankle, knee, and hip stack vertically. The calf does its actual job — springing instead of being "propped up" by a shoe.
What to expect when you switch
Your calves will work more for the first few weeks. You may feel tightness in the Achilles — this is tissue that has been shortened for years stretching out. Stretch gently, walk gradually, and within a few weeks the muscles adapt.