Real-time Feedback with Naos

Benedikt, October 4 2022

Naos measures accelerations, angular velocity, speeds, and positions and instantly transmits this raw data to our cloud servers for performance analysis. Our customers can access the results from anywhere and give feedback to athletes while they are training. What’s common-place in cycling sports is a novelty for most sports we are covering. In this post I explain how to use this new real-time analysis feature for ski jumping and rowing.

Photo of the Naos sensor with the sensor shirt


Switch on the sensor and wait until it connects to the 4G networks (20 – 30 seconds). Then leave the sensor static for about 15 minutes and with good view to the sky to allow finding enough satellites. In normal conditions we receive around 25 satellites, in excellent conditions we can receive over 30 satellites (remember, as a rule of thumb: the more satellites a sensor sees the higher the position and speed accuracy). Put the sensor in the shirt and give it to the athlete.

Screenshot of the list of the recordings of one sensor, with an ongoing recording

The real-time interface on the web lists all connected sensors and shows the current state of each sensor: whether it's off, on, and if it has GNSS signal reception. For each sensor, click on the plus sign to assign it to an athlete, training group, and discipline. This can be any time after the sensor has GNSS reception.

Ski Jumping Analysis

Open the measurement page. It shows the data recorded until the last refresh, or, if you open it for the first time, until you assigned the sensor to the athlete.

Screenshot of the recording in the beginning

Once the athlete has performed a jump, click the refresh button to obtain the new data. Do the smart segmentation to detect the new jump and save it. When you refresh the page, the jump statistics will appear.

Screenshot of the ongoing measurement after the first jump has been processed

The athlete continues his training and after his/her next jump click the refresh button again to receive the performance of this new jump. The updated display contains multiple graphs comparing the jumps. The first one shown below shoes the continuous-time speed differences between the two jumps. The longer jump is taken as the reference. Green colours indicate zones where the current jump was faster than the longest jump and purple colours where the current jump was slower than the longest jump.

Screenshot of the ongoing measurement after two jumps have been processed

Our customers use this data to better understand what factors contribute most to a long jump in a given situation. They are able to provide better and targeted feedback to the athlete, increasing the training efficiency.

Rowing Analysis

Screenshot of the real-time app for rowing performance analysis

For rowing we provide "true" real-time feedback. Optimized for the smartphone, our customers can track from anywhere the instantaneous performance of a boat. Because of the 4G data transmission there is no distance limitation, unlike Bluetooth- (BLE) or WiFi-based systems have. I could sit in my office in Düdingen and follow a boat on the other side of the world.

The real-time app detects each stroke and reports the 500 m split time, distance per stroke, average boat speed and total distance covered. The app’s display is automatically updated each stroke and allows tracking multiple boats at the same time. Moreover, any number of coaches can simultaneously watch the performance.


Other Sports

Other sports, such as athletics, ski-cross, snowboard-cross, or alpine skiing can be tracked as well in real time. A specialized app for ski / gliding tests is in preparation. Of course, instant video feedback with automatic data synchronization is also possible. But all this will be presented in future posts.

You want to improve your training with instant feedback? Write us an e-mail!