DJI added to their new Osmo 4k stabilization gimbal with the Z-axis attachment. For an additional $129, you can get this for your Osmo. It adds the ability to reduce vertical shaking for a more stable video.
I took the Osmo with Z-Axis for a run and the iPhone video was very solid. Using the joystick to move the camera around, the new Z-axis can keep you moving. It also allows for re-positioning so you can run the camera across the ground or way up high.
Get the Osmo here. Z-Axis is $129.