What does the RowP App measure? What immediate feedback is there?

You can swipe between a number of screens showing metrics or graphs showing boat, oar or seat data.

Main Rowing Screen

This is the default screen showing eight (or four if you prefer less) tiles with traditional metrics such as SPM, speed and distance but most interesting from rowing performance point of view are the metrics from the oar or seat sensor: You can see the arc length of your oar work in real time, or, the maximum seat speed during the drive. Each tile can be freely configured by long pressing the tile.

Boat acceleration curve

The first graph shows the acceleration of the boat during the previous stroke. When rowing, the boat velocity fluctuates in rhythm with the strokes. The oars propel the boat forward during the drive and this accelerates the boat. The movement of the rowers back and forth relative to the boat accelerates and decelerates the boat and the RowP App gives instant feedback on when and by how much the boat is speeding up or slowing down during the previous stroke.The shape of the curve as well as the max and min values depend very much on the rowing technique and gives information on the rowing efficiency. The y-axis shows the acceleration in m/s^2 whereas the x-axis shows the normalized time without units, the x-axis is auto-scaled to fit one entire stroke cycle from catch to finish no matter what the stroke rate is. If the y-value is positive it means that the boat is speeding up, and you can easily see during which part of the stroke this happens by having a look at what part of the curve is above the x-axis.

If you’ve strapped the RowP pod to an oar the following screens show feedback on how you are moving the oar. The first graph shows the path of the blade during one full stroke. The pod measures the rotation in all three directions to calculate the full path of the oar both horizontally and vertically.

 

Blade flight path

This graph visualizes how the oar is moving up and down as well as back and forth. The shape of the blade flight path reveals how the rower is handling the oar at catch, during the drive, at finish as well as during the recovery giving valuable insight into technique. On both axes’ we have degrees. All values are relative, not absolute. In fact each curve starts from 0/0, continues counter clock wise, and returns to starting point. The vertical axis represents how high or low (from 0/0 starting point) the blade goes and horizontal axis tells how far the blade goes in front/back-directions.

The Performance curve

This curve shows the angular velocity of the oar in the horizontal direction. The values and especially the shape of the performance curve reveal a lot about the rowing technique. The higher the angular velocity of the oar is when the oar is in the water the higher the force that is applied to the boat is, in other words the performance curve is related to the power curve but is different in that it is useful also for analyzing not only the drive phase but also the recovery.

If the performance curve has very steep sides when it crosses the x-axis it means that the rower is changing the direction of the motion very fast. Also you can see how even the distribution of power is during the drive and whether recovery is smooth or whether there is speeding up towards the catch. The location of the maximum angular velocity during drive and recovery can be analyzed in detail in the web portal (read more below), this is especially helpful for crews who want to row in synchrony.

If you’ve attached a pod to the seat the RowP App doesn’t show any oar graphs (the blade flight path and performance graphs above) but shows the velocity of the speed during one full stroke instead:

Seat speed curve

The seat speed is positive during drive and negative during recovery, of course the speed is 0 when the seat is stationary. You can see the maximum seat speed during drive on the right.

You need to press record to store data from your rowing for uploading to our web portal for more detailed analysis. Stop recording when you’re finished with your piece. Short recordings are enough to see the signature rowing style of a rower. When you’re finished with your rowing you can go to Sessions to upload all sessions you want to store. The sessions remain locally on your phone until they are uploaded or until you delete them. Remember to finally close the App in order to disconnect from the sensor. Remember to charge you sensor once in a while.

All recorded data can be uploaded to the Rowing Performance web portal which can be accessed with your Rowing Performance account login. Sessions are uploaded from the Rowing Performance App in the Sessions tab.