How to get measures for the trigonometric model?

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It is very simple. You DO NOT need any sophisticated tools. Nail it in the following 3 simple steps. All you need is to put your cycling shoes on and get a pen and meter.

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Do the following:

1. Find a door frame or wall corner you can stand next to,
2. Standing straight, use a pen to make marks on the door frame (or wall corner) at the level of the following joint centers:
   
   KNEE, HIP and SHOULDER; Make a mark on the bottom of your PALM.
3. Take a ruler/measuring tape and fill in the following measures into the model:

1. floor centre of knee joint
2. floor centre of hip joint
3. floor centre of shoulder joint
4. palm centre of shoulder joint