If I was only allowed to choose one exercise to help any golf athlete significantly improve their overall strength, I would choose the deadlift.
While the deadlift does not incorporate as much muscle tissue as the squat, it trains the most muscle groups.
This exercise literally trains you almost from head to toe.
Most importantly, it engages the hamstrings, quads, glutes, lower back, abdominals, lats, traps, forearms and even the pectorals.
Given that many golfers have difficulty maintaining their spine angle in the golf swing due to lack of strength in the hamstrings and back, this is a critical exercise.
To learn how to perform the deadlift properly, check out the tutorial I pulled from the Starting Strength Youtube channel below.