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About
Nine Under Golf is a golf performance facility based in Exeter, California, founded by Dr. Joe Terrill, a Doctor of Physical Therapy and TPI Certified Golf Performance Specialist. The facility offers two primary training pathways: an independent app-based golf fitness program (The Nine Under Swing Fix) and a fully personalized 1:1 coaching system (The Nine Under Elite Performance System). Programs integrate sports medicine and sports science principles to improve distance, consistency, swing speed, and injury prevention. The facility reports an average distance gain of 41.6 yards and 12.5 mph swing speed increase within approximately 10 weeks.
Location
Amenities
TPI certification
movement assessment
golf fitness programs
flexibility training
strength training
speed training
power training
balance training
endurance training
1:1 performance coaching
swing analysis
injury prevention
recovery strategies
training app
