Cross-country skiing training: endurance and upper body

If your arms gave out before your legs did on the last long ski of the winter, that is the normal pattern, not a personal failing. Cross-country skiing is one of the few sports where the upper body genuinely drives you forward, and it is the part most recreational skiers train least. What follows is a framework where endurance and upper-body strength grow side by side instead of cancelling each other out.

Why the arms fade first

In classic technique the poles do a large share of the work, and on flats and gentle descents, where you double pole, they do effectively all of it. Skating shifts more of the load onto the legs, but the poles still supply a meaningful chunk of your speed, especially on climbs.

The shoulder girdle and arms carry a smaller aerobic engine than the legs: less muscle mass, a thinner blood supply, less reserve. The same overall effort therefore turns unpleasant up top long before it does down below. That burning in the triceps and forearms after twenty minutes is untrained local endurance, nothing more.

The third point matters most for technique. Double poling is not an arm movement. Force starts at the feet and hips, travels through a braced trunk, and only then leaves through the shoulders and poles. When the trunk gives way, the arms work alone and burn through their reserve twice as fast.

The base: how many hours, at what pace

For a recreational skier who wants to ski two hours at a time all winter, 4 to 6 sessions a week totalling 5 to 8 hours is a realistic target. Roughly 80 per cent of that time should be easy — a pace where you can speak in full sentences, somewhere around 65 to 75 per cent of maximum heart rate.

Make one session a week long: 90 to 150 minutes on skis, roller skis, or hiking and running uphill with poles. It is not meant to be fast. Its job is capillary development in the working muscles and the habit of holding technique together once you are tired.

Through summer and autumn the base comes from running, cycling and pole hiking. If part of your winter mileage stays on foot, remember that footwear and pacing change the moment the ground turns icy, and an easy run quietly becomes something harder.

Intervals: two types, no more

The remaining 20 per cent goes into one, at most two, hard sessions a week. Two formats cover almost everything a recreational skier needs.

• Threshold work: 3 x 10 minutes or 2 x 20 minutes at a comfortably hard pace, with 3 to 5 minutes easy between. Breathing is quick but controlled.
• Short, sharp intervals: 5 to 6 x 3 minutes hard with equal recovery. These are easiest uphill, where technique stays honest and the heart rate climbs without any risk of a fall.

A hard session only works if the day before it was genuinely easy. Two demanding days back to back tends to produce a fatigue that lingers for weeks.

Double poling as its own session

The quickest way to stop your upper body being the bottleneck is to give it dedicated work. Spend 20 to 30 per cent of your time on snow double poling only, with no help from the legs.

• 3 x 10 minutes of steady double poling on the flat, 3 minutes recovery between blocks.
• 10 x 1 minute fast, 1 minute easy, as short-endurance work for the arms.
• With no snow: a poling ergometer or a resistance band anchored high, 6 to 8 x 2 minutes through the full range.

Watch two things. The push should finish behind the hip rather than at waist height, and you should come back upright using the abdominal wall, not a snap of the lower back.

Gym work that transfers

Two sessions a week of 30 to 45 minutes is enough even in the build-up period. Once the season starts, drop to one or two short maintenance sessions; anything more eats into time on snow.

• Vertical pulling (pull-ups or lat pulldowns): 3-4 sets of 6-10.
• Rowing, barbell or cable: 3 sets of 8-12.
• Triceps and parallel-bar dips: 3 sets of 8-15.
• Hip hinge: Romanian or conventional deadlifts, 3 sets of 5-8, for the posterior chain that holds your position through the pole push.
• Anti-extension trunk work: loaded planks, ab wheel or strict press-ups, 3 sets of 30-45 seconds.
• Hip flexors: hanging knee raises, 3 sets of 10-15 per leg.

Rest 2 to 3 minutes between strength sets and keep the technique clean. Finish with one or two long band-pulldown sets of 20 to 30 reps as a bridge towards endurance. Scapular control is worth training deliberately, on the same principles used in sports where the shoulder repeats one movement plane.

Fitting it into a week

One balanced example: Monday off, Tuesday 60 minutes easy plus strength, Wednesday intervals, Thursday 60 minutes easy, Friday strength, Saturday a 2-hour long session, Sunday easy or rest.

When strength and endurance start competing, put the gym on the same day as an easier session rather than the day before the long one — the same logic applies to lifting alongside triathlon training. If resting heart rate creeps up, sleep goes ragged and easy pace suddenly feels hard, those are early signs the load has gone too far, and the answer is less volume, not more.

In cold weather stretch the warm-up to 15 to 20 minutes and start slower than you would in summer. On anything over 90 minutes take 30 to 60 grams of carbohydrate an hour and a warm drink, because thirst is unreliable below freezing. Mittens keep hands warmer than gloves.

When to see a doctor

Wheezing, chest tightness, or a cough that hangs around for weeks after training in the cold is not the normal price of the sport. Airway problems are common in skiers and worth having checked. The same goes for chest pain, dizziness, or a heart rate that will not settle after effort.

Fingers or toes that stay white and numb after you have warmed up need urgent attention. Shoulder pain that lasts more than two or three weeks and changes how you pole should be looked at by a physiotherapist or doctor before it costs you the winter.

The short version

• Arms and trunk supply much of the propulsion and tire first, because their aerobic reserve is smaller than the legs'.
• Aim for 5 to 8 hours a week, roughly 80 per cent easy, including one long session of 90 to 150 minutes.
• Add one or two hard sessions: 3 x 10 minutes at threshold, or 5-6 x 3 minutes hard uphill.
• Spend 20 to 30 per cent of snow time double poling only; use a band or poling ergometer when there is no snow.
• Two gym sessions a week: pulling, rowing, triceps, deadlifts and anti-extension trunk work, 3-4 sets of 6-10.