Leg fold represents a numerical representation of the angle of the legs (ankle-knee-pelvis angle). Near the maximum value, the legs are fully extended, and near the minimum value, the legs are folded. 

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.