I saw this Ben Hogan video on YouTube. He is 66 years old.

I noticed that Ben:

1. Starts the swing using the same pre-shot routine (grip the club, aim the club head, stand to the butt end of the club, and good posture “GASP”)
2. uses the same rhythm
3. finishes in balance
4. creates an efficient down swing using vertical motion

He deliberately executes slow motion swings that show the efficient release of power in the down swing (the outside of the right latissimus dorsi stretches up as the front of the right thigh stretches down.  The bottom of the back inside of the ball of the right foot snaps up, the right upper arm and the right forearm drops down, while the little fingers engage up). Great stuff.