https://thegnomonworkshop.com/tutorials/mastering-body-mechanics-in-maya

One of the best things you can do to improve your animation workflow in Maya is to learn how to animate with the Master Control. While the Master Control is generally used for the placement of 3D characters, it can also be used to make the animation process a lot simpler — providing that you use it correctly.  This method taught in this 4-hour workshop by Senior Animator Kevin Nguyen can be implemented by animators of all levels, and can be used in both personal projects or professional production shots. It eliminates a lot of the technical hurdles in posing when animating a shot that requires a lot of movements, especially very complex character mechanics.  Kevin’s method will not only simplify the process of animation in Maya, but should ultimately save the animator a lot of time, which is a precious commodity in production. This workshop will help animators to work more freely and focus more on the artistic side of the animation process, rather than being held back by the technical side. This workshop also offers useful workflow tips and tricks to help improve the overall efficiency of any existing animation workflow.