Body angle revisited

Seat fairly laid back; BB 7cm above seat (bum area).

This gives a fairly open body-hip angle, as can be seen from the angle between the upper thigh and the torso which is around 110 degrees (when the pedal is in the recumbent zero degree position, where the thigh is raised its maximum).

Not so clearly shown in this photo because (a) the raised thigh is hidden by the extended leg and (b) the pedal is not in the zero degree position, but you can see that the raised torso makes for a more closed body-hip angle.

Here the seat angle is intermediate between the previous two configurations, the BB boom has been shortened, and the seat is slightly lowered in relation to the BB.  This gives a body-hip angle of around 80 degrees.  Note that body-hip angle is tricky to define and to measure; I try to use a line running down the centre of the torso, and a line joining the centre of the hip to the centre of the knee (when viewed from the side).  The hip-knee line is more readily distinguishable in this photo thanks to the seam running down the upper thigh of my thermal leggings.