11-12-2017, 09:42 AM
postoak, my mistake. I didn't give it enough thought. I've looked again more closely this morning and I can't figure it either.
My first thought, like yours, is that the hip angle is the angle between the top of the thigh and either the front or back of the body. I thought it's actually most likely to be the angle between the femur and the spine. On any of those premises, with my 5'8" and 30" inseam, when I look closely, any of those angles are greater than 90º.
I did a whole lot of Google searching about what hip angle means. It seems to be important in bicycle and horse riding, but I couldn't find a decent definition without delving into detailed academic papers which I couldn't find the motivation for.
So then I played around with the arm straightness function on cycle-ergo. As you'd expect, as the arms bent more and the angle got smaller, the hip angle also decreased. But I couldn't see any angle on the representation that explained it.
All of which left me wondering exactly what they're measuring. Of course, the explanation may lie in the nature of the graphic, but I somehow doubt that. So, I've written to them to ask how they calculate hip angle. I'll report back.
My first thought, like yours, is that the hip angle is the angle between the top of the thigh and either the front or back of the body. I thought it's actually most likely to be the angle between the femur and the spine. On any of those premises, with my 5'8" and 30" inseam, when I look closely, any of those angles are greater than 90º.
I did a whole lot of Google searching about what hip angle means. It seems to be important in bicycle and horse riding, but I couldn't find a decent definition without delving into detailed academic papers which I couldn't find the motivation for.
So then I played around with the arm straightness function on cycle-ergo. As you'd expect, as the arms bent more and the angle got smaller, the hip angle also decreased. But I couldn't see any angle on the representation that explained it.
All of which left me wondering exactly what they're measuring. Of course, the explanation may lie in the nature of the graphic, but I somehow doubt that. So, I've written to them to ask how they calculate hip angle. I'll report back.