There is a frustrating pattern that shows up in masters skiers who train hard and do everything else right. The sessions are consistent. The loading is sensible. The form is clean. And the strength still arrives slowly — slower than it did at 40, slower than the effort seems to justify. The work is going in. Less of it is coming back out.

Part of that is the training itself, and that is worth fixing first. But a large part of it is what happens in the hours after the session, in the part of the equation most masters skiers never program: protein intake, and the body’s diminished ability to use it.

The mechanism has a name. It is called anabolic resistance, and it is one of the more under-discussed realities of training after 50.

What Anabolic Resistance Actually Is

Muscle is not a static tissue. It is in constant turnover — proteins are broken down and rebuilt continuously, every day. Training tilts that balance toward building, but only if there is raw material available to build with. That raw material is dietary protein, specifically the amino acid leucine, which acts as the signal that switches on muscle protein synthesis.

In a younger athlete, a moderate dose of protein produces a strong synthesis response. The signal is loud. The machinery responds.

After roughly age 50, that response blunts. The same protein dose that produced a full anabolic response at 30 produces a weaker one. The muscle becomes, in effect, harder of hearing. It still responds — but it needs the signal delivered louder and more often to respond fully. That is anabolic resistance: not an inability to build muscle, but a higher threshold to trigger the building.

This is not a reason to train less or expect less. It is a specific, addressable variable. The same way recovery capacity changes after 50 without ending hard training, the protein requirement changes without ending muscle gain. You account for it, and you keep building.

Why This Matters Specifically for Skiers

A general fitness audience can treat protein as a vague wellness topic. For masters skiers, the connection is more direct, because the qualities skiing depends on are exactly the ones anabolic resistance puts at risk.

Skiing is a single-leg sport at the moment of maximum load. Edge engagement, mogul absorption, and turn finishing all run through one leg producing and controlling force. The strength that holds that position together is built in the off-season and defended through the winter. If the adaptation from your training is muffled because the building signal never fully fires, the single-leg strength you are counting on develops more slowly and erodes more easily.

The same applies to the slow-adapting tissues. Tendon and connective tissue already turn over more gradually than muscle, and they set the ceiling on how much you can load — a point worth its own discussion, covered in the post on tendon health for masters skiers. Underfeeding the recovery process narrows that ceiling further.

And there is the longer arc. The slow loss of lean muscle with age — sarcopenia — is not a cosmetic concern for a skier. It is the quiet erosion of the exact tissue that produces force on snow. Adequate protein paired with strength training is the most direct lever masters skiers have against that erosion. The physiological backdrop here connects to what is laid out in what actually changes after 50: the changes are real, they are specific, and they respond to specific action.

The Recovery Equation the Training Depends On

The CoreSkiing methodology is built on a recovery-first principle. Chapter 5 of Ski Strong for Life makes the case plainly: the best training is the training you recover from, and progress comes from consistency rather than exhaustion. That principle assumes the recovery actually happens. Sleep is part of it. Sensible loading is part of it. Protein is the part that supplies the material the recovery is made from.

Chapter 2 covers the physiological realities of training after 50 — recovery capacity, neural efficiency, connective tissue tolerance, and hormonal shifts. Anabolic resistance sits squarely inside that picture. The hormonal environment that supported easy muscle gain at 30 has shifted. The response to each protein feeding has blunted. None of that stops adaptation. It changes the inputs adaptation requires.

This is the same trap described in how smart recovery builds stronger skiers. The session is only the stimulus. What you do with the hours afterward decides how much of that stimulus becomes usable strength on snow.

What the Research Points Toward

Here the precision matters, and so does honesty about the limits of general guidance.

The research on masters athletes points consistently in a few directions. Total daily protein needs are higher for active adults over 50 than the baseline recommendations written for sedentary populations. The per-meal dose matters as much as the daily total, because anabolic resistance means a larger single feeding is needed to fully trigger synthesis. Spreading protein across the day in several meaningful servings appears to outperform loading most of it into one meal. And protein in the hours around training — particularly after a strength session — gives the building signal its best opening.

Practical shape, without turning this into a prescription: most masters skiers training seriously are under-eating protein relative to what their training is asking for, and the fix is usually structural rather than dramatic — a real protein source at each meal, a deliberate serving after training, and attention to the total rather than guesswork. Skiers traveling for a destination trip or grinding through a heavy ski week should hold that standard, not let it slide when it matters most.

I am deliberately not putting exact gram targets in this post, for a reason worth being upfront about: individual protein needs vary, and specific numbers are better set against your own body weight, training load, and any guidance from your own medical or nutrition professional than pulled from a blog post.

Where It Fits in the Training Year

The off-season is where this lever does the most work. The Summer Strength Build is built to add strength — bilateral and unilateral work, hip extension, loaded carries — across twelve weeks. That is the block where new muscle and new strength are most actively created, and therefore the block where the building material matters most. Training hard through a strength phase while under-fueling the recovery is the most common way to blunt the return on an otherwise sound program.

In-season, the goal shifts from building to holding. Protein still matters here, arguably more, because it defends the strength you spent the summer building against the slow drain of a long season and the higher recovery cost of skiing day after day.

None of this is exotic. It is the unglamorous side of training longevity — the steady inputs that, repeated for years, let a masters skier keep skiing hard into their 60s and beyond. That is the whole point of training this way: not a single strong season, but a long run of them.

This article is general training and physiology education for healthy masters skiers, not medical or dietary advice for any individual.

Most masters skiers who train seriously have a squat in their program. Goblet squat, front squat, back squat — the variation matters less than the fact that they are loading the pattern bilaterally, with both feet on the ground, sharing the work.

The problem is that skiing does not share the work. At the moment of maximum load — edge engagement through the fall line — the outside leg is doing the vast majority of the job. The inside leg is guiding, adjusting, sometimes along for the ride. This is a single-leg sport disguised as a two-legged activity, and training it with only bilateral exercises leaves a gap that shows up as fatigue, instability, and declining turn quality across a long ski day.

The Bulgarian split squat addresses that gap directly. It is not a supplement to bilateral work. It is a primary movement for any skier who wants their gym strength to actually transfer to the mountain.

Why This Exercise, Specifically

There are plenty of single-leg options. Lunges, step-ups, single-leg squats to a box. All have value. But the Bulgarian split squat occupies a specific position in the training hierarchy that makes it particularly useful for masters skiers.

The rear foot is elevated, which forces the front leg to manage roughly 80-85% of the total load through a deep range of motion. The hip flexor of the trailing leg gets a sustained stretch under load. The front-leg hip and knee are loaded through the exact range of motion that corresponds to the low, compressed position of a ski turn — the bottom of the movement mimics the biomechanical demand of holding an edge through variable terrain.

Unlike a lunge, the Bulgarian split squat is stationary. There is no forward momentum to manage. This makes it easier to control tempo, easier to load progressively, and easier to focus on the quality of the movement rather than the logistics of stepping and recovering. For masters skiers who need to train smart and accumulate quality reps without unnecessary joint stress, that matters.

The balance demand is real but manageable. The rear foot provides just enough support to prevent the movement from becoming a balance test instead of a strength exercise, while still requiring the front leg to stabilize laterally through the hip, knee, and ankle. This is the same stabilization demand that skiing places on the outside leg during a carved turn.

What It Trains That Matters on Snow

Three specific physical qualities developed by the Bulgarian split squat have direct ski transfer.

Single-leg hip extension under load. The drive out of the bottom position is a hip extension movement — glute and hamstring producing force to extend the hip from a flexed position. This is the same motor pattern as driving through a turn initiation from the compressed position at the bottom of the fall line. Bilateral squats train hip extension, but they allow the stronger leg to compensate. The Bulgarian split squat does not.

Knee stability through range. The front knee tracks over the foot through a deep flexion angle, loaded and controlled. The VMO (vastus medialis oblique — the teardrop-shaped muscle on the inside of the knee) is heavily involved in maintaining tracking through this range. Masters skiers who struggle with knee confidence on snow often have a VMO strength deficit that bilateral squats mask but single-leg work reveals. Chapter 8 of Ski Strong for Life details the full progression from bodyweight through loaded variations, including the alignment cues that protect the knee while building strength through it.

Hip flexor length under tension. The trailing leg’s hip flexor is stretched while the front leg works. Over weeks of consistent training, this produces genuine hip flexor mobility gains — not the temporary flexibility from static stretching, but the kind of usable range that shows up as a deeper, more comfortable tuck on snow and less lower-back compensation during long ski days. If you have read the piece on why your hips are the bottleneck, the Bulgarian split squat is one of the exercises that addresses that bottleneck under load.

The Progression That Works for Masters Skiers

Chapter 8 of Ski Strong for Life lays out the CoreSkiing progression model applied to this exercise. The framework is the same one that governs all primary movements in the program: master the movement before adding the load.

Phase 1 — Bodyweight, 3 sets of 8 per side. Use a bench or box that places the rear foot 12-16 inches off the ground. The focus is alignment: front knee tracks over the second toe, torso stays upright, the descent is controlled. Most skiers need 2-3 weeks at this phase to establish consistent depth and balance. Rushing past bodyweight is where compensation patterns develop.

Phase 2 — Bodyweight, 3 sets of 12 per side. Same setup, more reps. The additional volume reveals whether balance is truly stable or whether the first few reps were clean and the last few started drifting. If the 11th and 12th reps look like the 1st and 2nd, the movement is owned. If they do not, stay here.

Phase 3 — Loaded, 3 sets of 8 per side. Add dumbbells — 10 to 20 pounds per hand for most masters skiers as a starting load. The rep count resets to 8 because the movement under load is a different challenge. The balance demand increases. The strength demand increases. The temptation to shorten range of motion increases. Resist it.

Phase 4 — Loaded, rebuild to 3 sets of 12 per side. Increase load when you can complete 12 clean reps per side with the current weight. “Clean” means full depth, controlled tempo, and no lateral drift at the knee or hip.

The tempo matters. A 3-1-X tempo — three seconds lowering, one-second pause at the bottom, explosive drive up — builds the eccentric control and bottom-position stability that have direct transfer to the absorption phase of a ski turn. If you have worked with tempo training in other movements, the same discipline applies here.

Common Errors That Reduce Transfer

Three mistakes are common enough to address directly.

Rear foot too high. If the box or bench is too tall, the hip flexor stretch becomes excessive and the front leg cannot descend to full depth without the pelvis tilting anteriorly. The result is a lower-back arch that loads the spine rather than the hip. Use a height that allows a full, upright descent — typically 12-16 inches for most skiers.

Front foot too close to the bench. This turns the movement into a quad-dominant knee exercise. The front foot should be far enough forward that at the bottom of the movement, the front shin is roughly vertical or slightly angled. This ensures the hip extensors share the load with the quads — the same co-contraction pattern that protects the knee on snow.

Rushing the eccentric. Dropping into the bottom position eliminates the balance and eccentric strength benefit. The three-second descent is the most transferable part of the exercise. It trains the same slow, controlled absorption that the outside leg performs through every turn. If you cannot control the descent, the load is too heavy.

Where It Fits in the Annual Plan

In the Summer Strength Build, the Bulgarian split squat enters in Phase 1 at bodyweight and progresses through all four phases across 12 weeks. It is a primary movement, not an accessory — programmed with the same intention and tracking as the deadlift or front squat.

In the Fall Transition program, it continues with the load established during summer and gains additional complexity: tempo variations, occasionally paired with balance challenges on the supporting surface. The goal by the end of the Fall Transition is a strong, stable, controlled Bulgarian split squat with meaningful load — evidence that single-leg strength has been developed to match the bilateral foundation.

The Summer Strength Build program sequences this work across 12 weeks — structured so the loading progression matches where you are in the season.

During the in-season phase, the Bulgarian split squat is one of the movements worth keeping. It maintains the single-leg strength and hip mobility that bilateral squats alone cannot preserve. Two sets of 8, once or twice per week, at the load established during the pre-season phase, is enough to maintain without accumulating fatigue that interferes with ski days.

The Gap It Fills

If your training program includes a squat and a deadlift but no serious single-leg work, you are building a foundation that is missing one wall. The strength is real. The transfer is incomplete. The Bulgarian split squat is one of the most efficient ways to close that gap — loading the exact movement pattern, range of motion, and stabilization demand that skiing requires from every turn.

If you are already doing step-up progressions for knee resilience and VMO activation, the Bulgarian split squat is the natural complement — it trains the same leg through a deeper range of motion with greater hip extension demand. Together, they cover the full single-leg strength spectrum that serious ski performance requires.

The kettlebell swing is the most efficient way to train explosive hip extension for skiing. It trains the hip hinge pattern under load, at speed, with a power output profile that matches what skiing actually demands.

Most skiers who include swings in their training underuse them. They treat the swing as a conditioning tool — high reps, moderate weight, accumulated fatigue. That approach builds endurance but misses the primary benefit: training the hip extensors to produce force rapidly and repeatedly without metabolic degradation.

Why Hip Power Matters for Skiing

Every ski turn involves a hip extension moment. The transition from the absorption phase (flexion) to the drive phase (extension) determines edge engagement, turn completion, and the ability to redirect into the next turn. This hip extension must happen quickly and forcefully — it is a power event, not a strength event.

After 50, power declines faster than strength. A masters skier may maintain or even increase their deadlift, but the speed at which they can produce force through the hips declines measurably if it is not trained directly.

The AGT Swing Protocol

The anti-glycolytic training approach programs swings for power quality rather than metabolic stress.

Protocol: 10 swings every 30-45 seconds, for 10-15 rounds. Every rep is explosive. When the reps lose crispness, the set ends regardless of the count.

Load selection: Heavy enough that the hip snap is forceful, light enough that every rep is fast. For most masters male skiers, 24-32kg. For most masters female skiers, 16-24kg.

Rest: Complete between sets. The goal is not accumulated fatigue. The goal is repeated high-quality power output — which is exactly what a mogul field or a sustained run of demanding terrain requires.

Common Mistakes

Squatting the swing. The swing is a hip hinge, not a squat. The knees bend slightly; the hips do the work. If your quads burn more than your glutes and hamstrings, you are squatting.

Using the arms. The arms are ropes. They guide the bell. The power comes from the hip snap. If your shoulders are sore after swings, the arms are doing too much.

Going too light. An underloaded swing becomes an arm exercise. The bell should feel heavy enough that you must use your hips aggressively to move it.

Programming Across the Training Year

Off-season: Swings as a secondary hip power exercise, 2 sessions per week.

Pre-season: Swings become a primary power and conditioning tool, AGT protocol.

In-season: 1 session per week, 6-8 sets, maintaining power without adding fatigue.

There’s a common assumption among masters skiers who train seriously: if you keep your strength up, you keep your performance up. The deadlift stays heavy. The squat stays deep. The body is still capable of producing force.

What this framing misses is the distinction between force production and force production rate — between strength and power. They are not the same variable. They do not decline at the same rate. And for skiing, they do not have the same on-snow relevance.

After 50, power — the ability to produce force quickly — declines measurably faster than maximal strength. The mechanism is well established: type II muscle fibers (fast-twitch, responsible for explosive output) are preferentially lost after middle age. Motor unit recruitment slows. The nervous system requires more time to achieve peak activation.

Ski performance is profoundly time-dependent. When you need power on snow, you need it in that instant.

The Physiology, Plainly

Maximal strength is the peak force a muscle can produce, regardless of how long it takes to get there. In testing, this is your 1-repetition maximum.

Power is force multiplied by velocity — how much force you can produce in a given time window. An explosive jump, a fast barbell snatch, a reactive lateral hop: these are power outputs.

After 50, type II muscle fiber cross-sectional area decreases. The remaining type II fibers fire more slowly. The nervous system’s ability to recruit large motor units quickly becomes less efficient without targeted training. Meanwhile, type I fibers (slow-twitch) are relatively preserved.

This is why a 60-year-old masters skier might still squat 250 pounds but feel noticeably less explosive on snow than they were at 45. The strength is there. The rate of force development has slipped.

What Power Means on Snow

Edge recovery from unexpected terrain: You’re cruising a blue run when a patch of variable snow loads the outside edge at the wrong angle. The recovery requires rapid hip abduction and weight shift — a brief, explosive stabilizing contraction in under 200 milliseconds. If the rate of force development through the hip stabilizers is slow, the body compensates by falling into the fall line and making a broader recovery.

Turn initiation in bumps: In a mogul field, turn initiation is a rapid unweighting and redirection that must happen on the skier’s terms. The explosive hip extension and abdominal bracing that initiates a quick turn through bumps are power outputs, not strength outputs. If these are slow, the skier is always slightly behind the terrain.

What to Train: The Power Development Toolkit

Power training after 50 is not the same as power training at 30. The explosive intent is the key variable — you are training the nervous system to recruit motor units quickly.

Kettlebell Swings (Ballistic Hip Extension Power)

The two-arm kettlebell swing is the most efficient ballistic hip extension exercise for masters skiers. The hip extension power and rate of force development trained by the swing corresponds directly to turn initiation and mogul absorption.

How to program after 50: the anti-glycolytic approach fits naturally. Short sets (5-10 swings), complete rest, repeated many times. A typical AGT swing session: 10 sets of 10 swings, 60-90 seconds rest between sets. This is not conditioning work. It is nervous system training.

Starting load: 16-20 kg for most masters skiers.

Box Jumps and Jump Training (Lower-Limb Explosive Output)

The box jump trains the full lower-limb power chain. More importantly, the landing trains rapid deceleration and absorption, which directly mimics the demands of landing a mogul or absorbing an off-piste impact.

After 50, the box should be modest in height (18-24 inches). Five sets of 3-5 jumps, with full rest between sets. The key modification for masters skiers: step off the box rather than jumping off. The Achilles tendon and connective tissue are more vulnerable to high-impact eccentric loading after 50.

Explosive Step-Ups (Unilateral Power Development)

The concentric phase is performed as rapidly as possible while maintaining control. This trains single-leg explosive hip extension — the specific power demand of turn initiation from the outside ski.

Programming Power Work: Where It Fits

Power training requires a recovered nervous system. It should not be programmed after heavy strength work, at the end of a long session, or on days with accumulated fatigue.

The best position for power work: at the beginning of a training session, after a thorough warm-up but before significant fatigue.

In the off-season phase, power work can begin in Phase 3 of the Summer Strength Build (weeks 9-12), after the strength foundation is established. The Fall Transition program moves power development into a central training emphasis.

The full power development framework — including load selection, session structure, and how to integrate power work within the annual training cycle — is covered in Chapter 20 of Ski Strong for Life.

The Counterintuitive Case for Power Training After 50

Avoiding power training after 50 because it “seems risky” leaves masters skiers with exactly the quality deficit that most affects their on-snow performance and their resilience in the situations that cause ski injuries. The skier who cannot produce rapid hip stabilization under unexpected load is the skier most vulnerable when the terrain loads them unexpectedly.

Power training done intelligently — short sets, complete rest, intent-driven reps, appropriate loading — is not a high-risk activity. When the protocols match the biology, power training after 50 is accessible, sustainable, and more important than most training programs acknowledge.

The question is not whether to train power. The question is how to train it in a way that matches your recovery capacity and respects your connective tissue. That is a programming question, and the answer is available.

Most skiers who spend weeks training for endurance are actually training glycolytic capacity. They run intervals until they burn. They do metabolic conditioning circuits. They chase the lactate and call it preparation for the mountain. Then they ski three hard days and wonder why they’re cooked on day four.

This is the wrong training pathway for how your body actually skis.

The Energy System Reality

Skiing draws power from three energy systems. Understanding which one matters — and which one doesn’t — changes everything about how you train.

The alactic system handles short, maximal efforts: a hard set of turns, a mogul absorption, the explosive drive out of a transition. It lasts roughly 10 seconds before depletion.

The aerobic system sustains longer efforts at moderate intensity: cruising groomers, linking turns down a wide pitch, recovering between runs. It is highly efficient and produces minimal fatigue byproduct.

The glycolytic system bridges the gap. It activates during efforts between 30 seconds and a few minutes of sustained high intensity. It produces power, but it also produces lactate and hydrogen ions that slow muscle contraction and accumulate in the bloodstream and muscle tissue.

Here is the problem: skiing does not primarily demand glycolytic work. A single run might last 15 minutes, but it is not 15 minutes of continuous intensity. It is a series of turns, each lasting 2-5 seconds of hard effort, separated by recovery moments between turns. Over a full ski day — particularly a multi-day trip — you need the alactic system to produce power on demand and the aerobic system to recover between efforts.

Training the glycolytic system trains capacity you do not need and produces fatigue you cannot recover from quickly.

Why Glycolytic Training Fails for Multi-Day Skiing

Recovery capacity decreases with age. This is not conjecture; it is measurable. Masters skiers recover more slowly from high-lactate efforts, and the fatigue from glycolytic training persists into the next day. Train hard glycolytically on Monday, and your power output on Tuesday suffers.

Now extend this across a ski week. Day one is strong. Day two is fine. Day three, the glycolytic load accumulates. By day four or five, you are not skiing poorly because you are out of shape. You are skiing poorly because your body has not recovered from the accumulated metabolic byproduct of training.

The HIIT-trained skier feels strong on day one and two. The AGT-trained skier skis well on day one through day five — and beyond.

What Anti-Glycolytic Training Actually Is

Anti-glycolytic training (AGT) is a conditioning approach that keeps work in the alactic and aerobic energy systems. It is not low-intensity. It is not easy. It is specific.

In an AGT session, you perform work intervals at high intensity — RPE 6-7, smooth, powerful, sustainable — followed by full recovery. The recovery is the key. Unlike traditional intervals where you rest 30-45 seconds and return to work while still fatigued, AGT uses longer rest periods so that you complete each work interval feeling fresh and powerful.

The intensity is high. The recovery is complete. The result is adaptation in the alactic and aerobic systems without glycolytic accumulation.

An AGT Session in Practice

Here is what an actual AGT session looks like. This example uses kettlebell swings, a tool that develops hip extension power while fitting neatly into the alactic/aerobic window.

Kettlebell Swing AGT Session (20 minutes total)

• Warm-up: 5 minutes (light movement, mobility prep, no lactate accumulation)
• Work intervals: 15 kettlebell swings, performed with explosive hip extension and controlled descent. Each set takes roughly 30-40 seconds.
• Rest: 90-120 seconds complete recovery between sets.
• Sets: 6-8 rounds
• Target: Power output remains consistent across all sets.
• Heart rate guidance: Work intervals should reach 75-85% of max heart rate. Rest periods should drop to 60-65% of max.
• Intensity check: Nasal breathing during work intervals should be possible but challenging.

The entire session is 20 minutes. The next day, your power is undiminished.

Other effective AGT tools: sled push (30-40 yards, walk back to recovery), assault bike intervals (20-30 seconds of hard effort, 2 minutes of easy spinning), rowing machine intervals (500 meters with full recovery between sets).

The common thread: high intensity, complete recovery, consistency of power output across all sets.

The Ski-Day Translation

Here is where AGT proves itself: on the mountain.

A skier who has trained glycolytically feels strong on opening day. They have trained work capacity. But by mid-week, that accumulated lactate debt compounds. Their legs feel heavy. Their turn initiation slows.

A skier who has trained with AGT skis hard on day one and day five with the same edge sharpness and power. The alactic and aerobic adaptations transfer directly. Recovery between runs is complete.

The CMH heli-skiing trips — 144,000 vertical feet in a week — are the upper end of this: a 64-year-old can absorb 50-60 runs across challenging terrain in a week because the training system built for that has prioritized recovery capacity and sustainable power, not glycolytic threshold.

The Role of HIIT — And Why AGT Comes First

HIIT has legitimate uses. Glycolytic capacity matters for certain sports. It produces rapid fitness gains in younger athletes with higher recovery capacity.

But for masters skiers, especially those who ski multi-day trips, AGT produces better outcomes. Build your conditioning base — especially in the off-season — with AGT.

What You Need to Know Before Starting

AGT requires discipline in a different way than traditional conditioning. The challenge is not the intensity of effort. It is the restraint to rest fully and stop when power output drops.

Track your power output across sessions. Over 6-8 weeks, you will notice that ski days feel less demanding and that a full week of skiing no longer requires an extra recovery day.

Chapters 18 and 19 of Ski Strong for Life cover the full AGT methodology. The Fall Transition program integrates AGT conditioning into weeks 5-12.

The Takeaway

Endurance for skiing is not built by training until you burn. It is built by staying aerobic and alactic, recovering completely, and repeating that contrast over weeks.

Train the energy systems you actually use. The difference is felt on the mountain.