No, you don’t need any weights to perform weight and resistance training workouts in our Inspire functional trainer. This is because our SF3 functional trainer has both trainers with the red smith bar and it’s connected directly to the weight stacks. There is a resetting pin in the weight stacks that helps to adjust the weight. At the same time, the weight multiplier in the smith bar doubles the weight of the heavy lifters. Thus, you can double the weight with our SF3’s weight multiplier feature.