Golfers must alter stance width to match the slope and steepness of the lie because the contact angle between club and ground, balance demands, and the required swing path all change. Guidance from the PGA of America and biomechanics research by Dr. Stuart McGill at the University of Waterloo supports tailoring stance and weight distribution to preserve stability and reduce harmful spine loads during the swing. Player mobility, club choice, and shot intent also affect the ideal adjustment.
Steep lies: narrow and more centered
On a steep uphill or downhill lie the ground forces the club into a more vertical attack. Adopt a slightly narrower stance to allow freer vertical motion through the ball and to promote cleaner, descending contact with irons. Narrowing the feet reduces the need for exaggerated lateral weight shift and helps maintain a consistent spine angle so the upper body can hinge more easily. The consequence of failing to narrow on steep lies is increased tension, loss of balance, and thin or fat strikes. Coaches and coaches’ institutions recommend a more compact setup to keep the swing plane from becoming too flat or too steep, which can also increase compensatory torso rotation and spinal load, an effect discussed in the biomechanics work of Dr. Stuart McGill at the University of Waterloo.
Shallow lies: wider for balance and shallow attack
When the lie is shallow — for example on tight fairways or sidehill lies where the club approaches more level — a wider stance provides the base needed for a shallower swing arc and greater lateral stability. A broader foot position helps resist early extension and allows better use of ground reaction forces for a controlled shallow descent or sweeping motion with longer clubs. Titleist Performance Institute material emphasizes matching stance to the desired swing plane and to the player’s mobility profile, because wider stances can increase lateral stability but may limit hip turn for players with restricted mobility. Adaptations should be modest and tested on the practice ground; personal comfort and consistent contact matter more than rigid measurements.
Across environments — links courses with firm, sloping lies versus inland parkland — cultural shot expectations and ground conditions will influence how aggressively you adjust stance width. Work with a qualified PGA instructor or a Titleist Performance Institute professional to evaluate balance, swing path, and physical capacity before committing the change to on-course play.