Bryan Johnson hit a new personal record: 425 lbs squat, up 20 lbs from last week. That's 2.36x his body weight. He's crossed the strength threshold needed to dunk a basketball.

Now shifting focus to explosive power metrics:
• Takeoff velocity target: 13.7 ft/s
• Time to takeoff: 0.2 seconds
• Peak power output: 13.2 hp (9.8 kW)

This is less about raw strength now and more about rate of force development—how fast he can generate maximum force. Classic transition from strength phase to power phase in athletic training.