Per Retul:
The rider is prepared for 3D Motion Capture by marking the following eight bilateral anatomical structures with infrared markers: Head of 5th Metatarsal Head (ball of foot), Distal end of Calcaneous (heel), Lateral Malleolus (ankle), Lateral Femoral Condyle (knee), Greater Trochanter (hip), Acromion (shoulder), Lateral Epicondyle (Elbow), Dorsum (upside) of wrist joint.

You can find all these points on Google Images, but here's an overview:

Lateral Malleolus (ankle) - that big round bone on the outside of your ankle

Lateral Femoral Condyle (knee) - the outside of your knee, the bump at the end of your femur

Greater Trochanter (hip) - much harder to see than the other two (esp. since it's under clothing); basically if it's placed correctly the dot shouldn't move as you pedal

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ECMGN Therapy Silicon Valley:
Depression, Neurocognitive problems, Dementias (Testing and Evaluation), Trauma and PTSD, Traumatic Brain Injury (TBI)

Thanks a lot for this - it's very helpful and I appreciate you putting it together.

Only problem with using Retul's guidance as a means of doing Dartfish-style measurements is that finding the femoral condyle, trochanter, 5th met, and the head of the acromion require palpation. For all but the leanest of riders, you won't be able to visually use these points and get accurate measurements that fall within Retul's ranges.

Instead, use the center of the joint for the hip, knee, and shoulder.

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Trent Nix
Owned and operated Tri Shop
F.I.S.T. Advanced Certified Fitter | Retul Master Certified Fitter (back when those were things)