How Zen Master Coach, Liam Mucklow uses the Zen Swing Stage to Improve GRF
Overview
Most golfers practice on perfectly flat surfaces.
Yet fewer than 5% of golf shots on the course are played from level lies.
This mismatch between practice and performance environments is one of the most overlooked problems in golf coaching.
In golf, the swing does not exist in isolation. Movement emerges from the interaction between the golfer and the environment.
Every movement in the swing depends on how a player interacts with the surface beneath their feet. Balance, pressure shifts, and rotational forces emerge from this interaction.
When this interaction becomes inefficient, even technically strong swings struggle to produce reliable ball striking.
This idea sits at the center of the work of Zen Master Ambassador Liam Mucklow.
Liam is a PGA coach, a TPI certified instructor, and founder of The Golf Lab in Toronto.
His coaching blends biomechanics, ground reaction force measurement, and applied motor learning principles to help players understand how movement emerges from the ground up.
The Zen Swing Stage forms a key part of that work.
It allows Liam to change the environment beneath a player’s feet and observe how movement reorganizes in response.
Written by: Will Stubbs, Head of Education, Zen Golf
Last Updated: 29/04/2026
What Are Ground Reaction Forces in Golf?
Ground reaction forces are the forces created between a golfer’s feet and the ground during the swing.
These forces allow golfers to generate rotational speed, stability, and power through the body.
Three key forces influence the golf swing:
- Vertical force – pushing against the ground
- Horizontal force – controlling pressure shifts
- Torque force – generating rotational acceleration
TPI biomechanics data notes that some elite players generate around 150% of bodyweight in vertical force during the downswing, with PGA Tour averages in its database reported as even higher.
These forces allow the body to create rotational acceleration and clubhead speed. Yet most golfers practice on flat surfaces that rarely exist on the course.
Introducing slopes into training environments allows coaches to observe how players adapt pressure shifts, balance, and force timing under realistic conditions.
Liam Mucklow on Data-Driven Coaching
At The Golf Lab, Liam combines the Zen Swing Stage with force-plate and motion-analysis tools, alongside principles informed by his Titleist Performance Institute certification.
Modern data-driven environments give coaches, like Liam, the ability to measure how golfers interact with the ground during the swing.
The Zen Swing Stage adds another dimension to the data.
Instead of measuring a swing on a flat mat, coaches can observe how the movement system adapts when the slope changes.
This reflects a constraints-led approach, where movement adapts to the task and environment rather than being treated as a fixed pattern.
For Liam, this creates a more realistic training environment.
Golf is played on uneven ground. Practice should reflect that reality.
Why Slope Changes Movement
When a golfer stands on a slope, movement organization changes immediately.
- Balance adjustments occur.
- Pressure distribution shifts between the feet.
- Force production patterns reorganize.
These adaptations reveal information about the player’s movement strategy.
Slope often exposes inefficiencies that remain hidden on flat surfaces.
For coaches, studying ground reaction forces becomes valuable.
It shows how the body produces stability, rotation, and force through the ground.
The Zen Swing Stage allows these conditions to be introduced deliberately during training.
Case Study: Improving Ground Force Efficiency
One example from Liam’s work involved an NCAA Division I player working to improve ball striking consistency.
Initial analysis revealed strong upper body mechanics but inefficiencies in lower body movement patterns.
Swing Catalyst force data highlighted several issues.
- Pelvic over rotation created instability in the backswing.
- Ground reaction force peaks occurred late in the downswing.
- Vertical force production dropped near impact, creating instability.
This pattern reduced the efficiency of energy transfer through the swing.
Liam described the movement pattern simply.
“Shooting a cannon from a canoe.”
Without a stable lower body platform, upper body movement cannot transfer force efficiently.
Using the Zen Swing Stage
To address the player’s issue, Liam introduced Stage as an environmental constraint.
The Zen Swing Stage was set to an eight percent incline.
This slope forced the player to stabilize the trail leg during the backswing and apply horizontal force earlier in the motion.
The environment demanded a different movement solution.
Players cannot maintain the same sway patterns on an incline. They must stabilize earlier and organize force production more efficiently.
These additional adjustments supported task performance.
The stance width increased by four inches to improve the base of support.
Swing Catalyst provided real time feedback showing how ground reaction forces changed as the player adapted.
The intervention focused on the environment first.
Movement reorganized in response.
What Changed in the Swing
The results were measurable.
Horizontal and rotational forces increased.
Vertical force output rose by sixteen percent and occurred earlier in the swing sequence.
Visual analysis showed improved stability through the lower body and reduced pelvic over rotation.
The unstable “cannon from a canoe” pattern disappeared.
The player produced a more stable and explosive movement pattern.
The key factor was not a verbal swing change.
It was the task environment.
Slope exposed the movement problem and guided the athlete toward a more efficient solution.
Representative Learning in Full Swing Practice
Golf is played on variable terrain, not flat mats.
Research on shots from different lies shows that slope changes launch conditions, while biomechanics data shows elite players generate substantial ground reaction forces to create speed and stability.
For coaches, that makes the training surface part of the skill, not just the setting.
Liam’s approach reflects principles from the constraints-led approach in skill acquisition.
Movement solutions emerge from the interaction between the athlete and the environment.
When the environment changes, the movement solution adapts.
The Zen Swing Stage allows coaches to manipulate this environment deliberately.
Slope becomes a design tool.
It reveals movement inefficiencies.
It encourages athletes to explore alternative force production strategies.
And it creates practice conditions closer to those found on the course.
The case study demonstrated how slope-training helps players develop movement stability and efficient ground force usage.
Why This Matters for Coaches
Many golfers practice on flat surfaces.
Yet the course rarely presents flat lies.
When practice removes sloped conditions, players learn one movement pattern.
When practice includes slope, players learn adaptability.
Coaches gain insight into how players organize movement under different constraints.
For Liam Mucklow, slope serves two purposes.
It reveals movement problems.
It accelerates the development of more efficient movement solutions.
The Role of the Zen Swing Stage
The Zen Swing Stage supports this coaching process by allowing controlled manipulation of slope beneath the player’s feet.
Coaches can introduce:
- Uphill lies
- Downhill lies
- Ball above feet
- Ball below feet
- Diagonal slopes
These conditions allow players to explore different ground force strategies while maintaining a realistic training environment.
Combined with systems like Swing Catalyst, the Stage becomes a research and coaching tool.
It connects environmental constraints with measurable movement outcomes.
Takeaway
Liam’s coaching highlights a key principle of golf performance.
Movement begins with the ground.
When the interaction between golfer and ground improves, force production, stability, and ball striking improve.
The Zen Swing Stage allows coaches to study and train this interaction by introducing realistic slopes into practice.
Slope changes the environment.
The environment shapes the movement, and movement adaptation leads to more reliable performance on the course.
Explore What the the Swing Stage Could Do for You
For Players
Train in environments that reflect real golf and build confidence that transfers to the course.
For Coaches
Understand how players think, adapt, and perform under realistic constraints.
For Indoor Facilities
Deliver a premium experience that connects entertainment with performance.
For Universities and Colleges
Prepare players for competition through representative practice environments.
Explore the Trackman x Zen Integration Overview.
Explore Zen Swing Stage, Zen Green Stage, and Zen Golf Stage.
Book a call to discuss how the next evolution of sim golf could support your players, program, or facility.
