Quote Originally Posted by dsuprak View Post
I am trying to use a triaxial accelerometer to calculate vertical velocities during a resistance training exercise done both in a slow, controlled manner, and then in the same movement done quickly. When I integrate the acceleration data using the equation vf = at + vi, the velocities come out strangely. I have attached an Excel file with the data and a graph showing the accelerations collected and the velocities calculated based on these data. These velocities don't make sense, so can anyone offer some guidance as to how I need to treat the data in order to properly calculate velocities?

Any advice would be much appreciated.
Dear Sir,

You solve this problem? How do you do if you solve it?
You are assuming that the accelerometer moves without any rotation no?