Biomechanics: How to Perform the Single Leg Functional Reach Correctly

Biomechanics: How to Perform the Single Leg Functional Reach Correctly

Single leg exercises reveal movement flaws quickly.

If your knee collapses, your lower back arches, or your balance feels unstable, it is rarely just a “strength problem.” It is often a biomechanics issue.

At Function Thru Fitness in Green Bay, WI, the single leg functional reach is one of the movements we use to assess and improve lower-body control.

Why Single Leg Control Matters

Most athletic movements — walking, running, climbing stairs, golfing — happen on one leg at a time.

Poor single-leg mechanics can lead to:

• Knee discomfort
• Low back tightness
• Hip instability
• Glute weakness
• Compensation patterns

When the body lacks control, it finds another way to complete the task. That compensation eventually creates pain.

How to Set Up the Single Leg Functional Reach

In this video, John Blaser walks Kim through proper setup and execution.

Start position:

• One foot planted firmly on stable ground
• Opposite foot placed on a sliding surface
• Hands lightly holding support handles
• Knee aligned over the laces of the shoe

Before moving, engage the core and sit tall. Posture matters.

Execution Focus

As you descend:

• Drop the back knee under control
• Keep the torso upright
• Avoid arching the lower back
• Maintain knee alignment

The key cue is to “pull yourself up through the ceiling” using the planted leg rather than simply pushing back up.

This prevents excessive lumbar extension and keeps the glute in an optimal position to work.

Common Mistake: Arching the Back

One of the most common errors we see in Green Bay clients is excessive low back arching during descent.

When you:

• Push too far outward
• Overextend through the spine
• Lose core engagement

You shift tension away from the glute and into the lower back.

That changes the entire biomechanics of the movement.

Instead of strengthening hip stability, you reinforce compensation.

Why Glute Positioning Matters

The glute functions best when the pelvis and rib cage are stacked properly.

If the lower back arches:

• The glute loses mechanical advantage
• The hamstrings overcompensate
• The lumbar spine absorbs unnecessary stress

Proper biomechanics ensures the glute closes the hip effectively and supports knee alignment.

Who Benefits from This Exercise?

The single leg functional reach is excellent for:

• Athletes improving unilateral strength
• Golfers needing better lower-body control
• Adults with knee discomfort
• Clients rehabbing from lower-body injury
• Individuals with low back tightness

This movement is often programmed inside personal training plans in Green Bay when restoring hip stability and movement efficiency.

Why Biomechanics Assessment Matters

At Function Thru Fitness, we do not assign single leg work randomly.

As the only Certified Biomechanics Specialist in Green Bay, John evaluates:

• Pelvic control
• Rib cage positioning
• Knee tracking
• Hip stability
• Core engagement

Then corrective exercises are programmed intentionally.

The goal is not just to strengthen — it is to restore optimal function.

Watch the full video to see proper execution of the single leg functional reach and learn what to avoid.

If you want a personalized biomechanics assessment in Green Bay, WI, schedule a consultation to evaluate your movement patterns.

FAQ SECTION

Q - What is a single leg functional reach?

A - It is a unilateral exercise that improves hip stability, knee alignment, and core control.

Q - Why does my lower back arch during single leg movements?

A - Arching often occurs when the core is not properly engaged or when hip mechanics are compromised.

Q - Is this exercise good for knee pain?

A - When performed correctly and programmed appropriately, it can support improved knee alignment and reduce compensation patterns.

Looking for a better way to stay strong, mobile, and pain-free as you age?

At Function Thru Fitness, we go beyond big-box gyms. As one of the established fitness centers green bay wi, our focus is on restoring how the body moves, reducing pain, and building long-term strength through a proven function fitness approach.

We help people move better at every stage of life through personalized training, corrective exercise, golf fitness, neuromuscular therapy, and athlete recovery.

Download our free guide:
Essential Exercises for Lifelong Mobility and Independence
www.ftfpt.com/essential-exercises

Visit us at 801 Hoffman Rd. Suite 103, Green Bay, WI
Book online at www.ftfpt.com