Center velocity represents the speed of movement of the center of gravity of the body. Near the maximum value, the faster the center of the body moves, the closer to the minimum value, the slower the center of the body moves. Specifically, a peak value of 1 corresponds to actions like jumping, 0.6 to jumps within specific actions like ballet jumps or cartwheels, 0.4 to sitting, and 0.2 to walking. 

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.