Control the swing with hips and core, not arms
Amy Cho explains shifting the main control of the swing from the arms and shoulders to the hips and core. She says that when the upper body drives the swing, the lower body will not follow through as nicely, whereas using the midsection lets the head and foot follow through naturally.
Channel: Golf with Aimee
Watch official source at 1:32Why this context matters
The core concept of the lesson: what part of the body should drive the swing.