Grounding represents whether and to what extent both feet are grounded. Near the maximum value, both feet are in contact with the ground, and near the minimum value, both legs are far from the ground with a large extent equals to jump and small extent equals to walk. Specifically, a peak value of 0.7 corresponds to actions like jumping, 0.9 to  actions like walking or running. 

To find the local maxima, we identify the ranges where the values reach a peak within the dataset. A local maximum is a point where the value is higher than its neighboring values. This indicates periods of high activity or dynamic movement. The detection is based on a threshold percentage (e.g., 80% of the maximum value) to focus on the most significant peaks. The output lists the frame ranges where these peaks occur and their respective values.