I would like to share successful experience of active track in mavic pro. Tips are
1. Keep your done in high altitide ( drone in 10 meter altitude is better to follow you than 5 meter altitude)
2. Drone just behind your head, about 20 degree angle behind your head ..
3. Drone along the direction of wind,
Here is my cycling video with sprint up to 50km/h and it can still follow me (Luckily, I can see the shadow of moving drone in front of me though. )