Step-Up Progressions for Ski Strength and Knee Resilience

The Quiet Worry

Knee confidence is the thing most masters skiers quietly worry about.

You see it on the chairlift: the skier who locks up before a steep pitch, or who feels their knee settle into a turn with a small, careful movement instead of committing to the edge. Not pain necessarily—but a sense that the knee is the limiting factor, not the lung or the leg muscles. That the joint itself is not quite there yet.

The common response is to avoid impact, reduce loading, do lighter work. The logic is understandable but incomplete. Knee resilience is not built by going light. It is built by systematically loading the structures that support the knee under the exact conditions that skiing demands: single-leg loading, deceleration under eccentric tension, rapid transitions between loaded and unloaded phases.

Step-ups—particularly the Peterson and Poliquin variations—are one of the most direct tools for building that resilience. Not by pampering the joint, but by building the neuromuscular and connective tissue structures that allow the knee to handle what skiing asks of it.

Why Single-Leg Loading Matters More Than Bilateral Strength

A 300-pound bilateral back squat does not guarantee confidence on a mogul field.

Here is why: skiing is a single-leg sport at the moment of maximum load. When you edge a ski and load the turn, the outside leg is bearing the lion’s share of your body weight and deceleration force—alone. The inside leg is contributing, but the load distribution is not balanced. Neither is the neural demand. The knee must stabilize itself under unilateral loading, which demands VMO activation (the tear-drop-shaped quad muscle on the inner thigh that controls terminal knee extension) and stabilizing co-contraction from the hamstring and calf.

Bilateral squats teach bilateral strength. They do not teach the knee how to stabilize itself when 180 pounds of load is traveling across a single edge, on a single leg, with ski boots on. The transfer does not happen automatically.

Single-leg work—step-ups, Bulgarian split squats, single-leg Romanian deadlifts—closes that gap. The nervous system learns to recruit stabilizers. The VMO learns to fire. The knee learns to handle load and deceleration on one leg. That is the work that transfers to skiing.

Bilateral work remains important as a foundation. But bilateral alone is incomplete.

Peterson Step-Up vs. Poliquin Step-Up: Two Tools, Two Purposes

Both variations use the same basic movement—stepping up onto a box. Both are single-leg dominant. But they have different mechanics and different primary training effects.

Peterson Step-Up

The Peterson Step-Up emphasizes terminal knee extension and VMO activation.

The mechanics: Step up onto a box (typically 8-12 inches to start), but do not drive through the hip. Instead, the focus is on straightening the knee fully at the top of the movement. The trailing leg stays down. Your body should nearly straighten into an upright standing position with the stepping knee fully locked out.

The loading pattern places the demand primarily on the quad, and specifically on the VMO at the moment of full knee extension. The top of the movement—that final lockout—is where the VMO works hardest. If you hold that top position for a second or two, you amplify the demand even further.

Why this matters for skiing: VMO activation and terminal knee extension strength directly support the moment when you are extending your leg to push against the ski and finish a turn. The VMO is active during edge engagement and extension, and improving its function improves knee stability and proprioceptive feedback.

Coaching cues for Peterson Step-Up:

• Step up, but do not push off the back leg. Let the front leg do the work.
• Straighten the knee fully at the top. No partial extension.
• Keep your body upright. Do not lean forward.
• Control the descent. Three seconds down. Pause at the bottom. Drive up.
• If you are holding a load (dumbbell or kettlebell), hold it on the opposite side of the stepping leg.

Common errors:

• Pushing off with the back leg rather than loading the stepping leg.
• Partial knee extension at the top. Full lockout is required.
• Forward lean. Stay upright.
• Rushing the descent. The eccentric phase is where the VMO learns to stabilize.

Poliquin Step-Up

The Poliquin Step-Up emphasizes hip extension and glute loading under single-leg conditions.

The mechanics: Step up onto a box (typically 12-16 inches), and as you step up, drive through the hip. Your goal is to create a full hip extension at the top—your hip should feel like it is being extended backward.

The trailing leg can brush or lightly tap the box on the way up, but the work comes from the hip of the stepping leg. At the top, your hips should be slightly extended, not just upright.

Why this matters for skiing: Hip extension strength and power are essential for turn initiation and mogul absorption.

Coaching cues for Poliquin Step-Up:

• Step up. Drive the stepping leg into hip extension as you rise.
• Feel your glute working, not just your quad.
• At the top, your hips should be slightly extended.
• Control the descent. Three seconds down. Do not collapse.
• Hold a load in both hands or use a weight vest.

Common errors:

• Staying too vertical. Hip extension should occur.
• Pushing primarily with the quad rather than driving the hip.
• Rushing the ascent.
• Not loading heavily enough.

The Progression: Where to Start, How to Build

The CoreSkiing progression model applies directly to step-ups: form mastery before load, volume expansion before intensity increase.

Phase 1: Form Mastery (Weeks 1-4)

Start with bodyweight. Choose a box height that allows you to complete the movement pattern cleanly—typically 8 inches to start.

For Peterson: Focus on terminal knee extension lockout. Complete 3 sets of 8 reps per leg, with full control on the descent.

For Poliquin: Focus on hip extension drive. Complete 3 sets of 8 reps per leg.

Tempo: 3 seconds down, 1 second pause at the bottom, 1 second up.

Phase 2: Volume Expansion (Weeks 5-8)

Bodyweight continues, but now you increase the reps from 8 to 12. RPE 5-6.

Tempo: Maintain 3-1-1. Do not rush.

Phase 3: Load Introduction (Weeks 9-12)

Add load while resetting reps to 8.

For Peterson: Box height 10-12 inches. Hold a single dumbbell in the opposite hand. Start with 15-20 lbs. 3 sets of 8 reps per leg.

For Poliquin: Box height 12-16 inches. Hold dumbbell or use weight vest. Start with 20-30 lbs. 3 sets of 8 reps per leg.

Phase 4: Load and Volume Cycling (Weeks 13+)

Build back to 12 reps at the same load, then increase load and reset to 8.

The Knee Under Load: What Happens, and Why It Matters

The knee is a hinge joint. Under proper load—meaning load applied with stable alignment—the connective tissue structures around the knee adapt.

The ligaments strengthen. The cartilage surface becomes more resilient to shock. The VMO and vastus medialis muscles learn to fire in a coordinated way. The hamstring and calf develop co-contraction patterns that stabilize the knee when extended under load.

This takes time. But over 8-12 weeks of consistent step-up work—done with good form, appropriate loading, and patience—the knee does adapt.

The key is progression discipline. The knee responds well to incremental increases tied to demonstrated movement quality.

Connection to Skiing and Program Sequencing

Step-ups—both Peterson and Poliquin—appear in the Fall Transition program as part of the pre-season bridge from gym strength to ski-ready movement. They are sequenced into Phase 2 (Power + Lateral Development) and Phase 3 (Ski-Specific Integration).

Step-ups demand single-leg stability, require explosive drive, and build the knee strength that allows you to commit to edge loading without hesitation.

The full progression for step-ups is in Chapter 22 of Ski Strong for Life.

What This Means for Your Skiing

A masters skier who approaches the mogul field with knee confidence approaches differently. The hips are higher. The turns are more aggressive. The rhythm is faster.

That shift—from managing the knee to trusting the knee—often starts not with more skiing, but with consistent, intelligent strength training. Step-ups, done well over 12 weeks, deliver that shift.

The work is straightforward. The results compound. Do the progression. Control the tempo. Progress when the form supports progression. Ski better.

The Fall Transition program sequences this work across 12 weeks, building from gym strength to ski-ready movement capacity.