In this episode, researchers Daniel Plotkin and Max Coleman explore the current science behind what builds more muscle - free weights or machines.

Free weights, such as barbells and dumbbells, have long been viewed as superior for muscle growth.

But is that really the case?

Not quite. It seems like machines can be just as effective.

But it's important you know the major differences between using machines and free-weights, and what muscle groups benefit the most from either machines or free weights.

Enjoy!