Right leg extremity angular velocity represents the angular velocity value of right leg. Near the maximum value, the larger the angular velocity value of right leg, indicating fast rotation, near the minimum value, the slower the rotation. 

To find the local minima, we identify the ranges where the values reach a low point within the dataset. A local minimum is a point where the value is lower than its neighboring values. This indicates periods of less activity or reduced movement. The detection is based on a threshold percentage (e.g., 20% above the minimum value) to focus on the most significant dips. The output lists the frame ranges where these dips occur and their respective values.