Pedal angular velocity visualization

Pedal angular velocity visualization

One of the new features in Velogic Studio v4 is the ability to visualize how angular velocity of the pedal varies throughout the pedal stroke.
If you Lock in a single capture for review (or Compare 2 captures), and then click on the Cadence metric:
 
... you'll see a visualization graph overlaid on the Crank Angle scrubber, at the top of the Stroke Analysis video:



In this visualization:
  1. The horizontal axis represents the crank angle
  2. The small dots along the horizontal axis represent frames that Velogic Studio has included in the analysis
  3. The large dot represents the current crank angle being displayed
  4. The blue graph line is Velogic Studio's measurement of the angular velocity of the pedal at that crank angle, arranged above and below the average. 
Usually, you would expect to see a peak or "hump" in the pedal angular velocity during the power phase. In the example above, the power phase appears to be "bimodal", which might be something you would investigate during the fit.
You can use this visualization to understand how the pedal/crank is accelerating or decelerating throughout the stroke. It's particularly effective when you compare this between two captures, to understand the effects of an intervention, and may be interesting to investigate correlation with ankle flexion.


    • Related Articles

    • Ankle Flexion metrics and visualization

      Historical: Ankle Angle metrics Historically, Velogic Studio used 7 markers: wrist, elbow, shoulder, hip, knee, ankle, and toe. From those 7 markers, a range of metrics were calculated; for the foot, this was mainly "Ankle Angle" which is a simple ...
    • Knee track

      As a fitter, it's useful to know what your rider's knee is doing during the pedal stroke. For example, is the knee moving directly up & down, or is it flaring out (away from the frame) at the top of the stroke, possibly indicating hip impingement? Is ...
    • Extra tips

      If you choose to switch sides during a fit you will need to click the calibrate button below the liveview screen every time you change sides If you wish to perform a quick fit you can use this system without calibrating. It will only offer the ...
    • Reviewing and comparing fit artifacts

      As you carry out the fit, Velogic Studio records various "artifacts" for each capture. These include: Raw videos from the depth camera(s) and/or any webcams you have at different positions around the rider. Stroke analysis videos from the depth ...
    • Report options and pages

      Velogic Studio has a professionally-designed, full-featured, automatically-generated report. Our users frequently give feedback that this is the "best feature" of Velogic Studio, so let's explore! The report is generated on Step 3 of the fit process. ...