@TerribleBPthrower and @ARCEKU21, you both nailed it with Marc Pro usage. How Marc Pro works with arm care is how it helps with any muscle recovery in the body, so putting pads where it's going to be sore is the whole point. Arm care is the trendy topic so gets all the attention (as do pitchers) but muscle recovery is a systemic thing. Even though pitchers are our most common baseball customer, in my honest opinion it should be catchers.
The premise of the unit is that safe, non-fatiguing muscle contractions, facilitate fluid movement. Basically good stuff in, bad stuff out. Everyone focuses on blood flow (oxygen and nutrient distribution) to help repair damaged tissue, but most people skip the lymphatic drainage side. Removing waste is crucial to decongesting muscles, reducing overuse injury, clearing the way for continued improved blood flow, and reducing ROM concerns. The lymphatic system doesn't have a heart muscle to drive fluid through it and relies on muscle contractions to get waste out of an area. Both good in and bad out are needed to adapt the "damage" of a workout into strength.
The idea of running poles is sound: non-taxing movement to move waste. BUT kids hate it, it's not targeted at the muscles that need it most, and it's still going to be burning some ATP and glycogen stores. The idea of the Marc Pro is to supplement active recovery without the chance of turning it into a workout, removing additional stress on tendons and joints, and doing it with other activities like driving home or doing homework.
Hope that wasn't too salesy!