Cross-Country Ski Training: Aerobic Base, Roller Skiing, Strength and Periodization

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July, 6 a.m., a quiet bike path. The roller skis hum, the pole tips click on the asphalt, and a junior team rolls past in a long line, double poling in rhythm. Nobody’s racing yet; the season is five months away. That’s the secret of cross-country skiing: races are won in summer and fall, in long easy hours, roller-ski sessions and strength work most people never see. This page explains how skiers train, from kids in a club program and high school racers to college skiers, World Cup athletes and adults building toward their first 50 km marathon.

General information, not a personal training plan. Young athletes, beginners and anyone with a health condition should get guidance from a qualified coach and, where needed, a doctor. Back to the cross-country skiing hub.

What cross-country skiing asks of the body

A review in the International Journal of Sports Physiology and Performance calls cross-country skiing one of the most demanding endurance sports: long races on rolling terrain, several techniques, and a mix of arm and leg work that changes with every hill. The Compendium of Physical Activities puts moderate cross-country skiing at about 8.5 METs (multiples of resting energy), brisk skiing at 11.3, skating at 13.3 and elite racing at 14 to 16. Few sports ask for that much energy for that long, which is why skiers have some of the highest aerobic capacities ever measured.

• A big aerobic engine for 10 km to 50 km races and 90 km marathons.
• Upper-body endurance and strength for double poling, which carries more and more of modern racing.
• Speed and repeated surges for sprints, mass starts and the last climb.
• Technique and balance in both classic and skating, on glide, on ice and in soft snow.

The aerobic base: lots of easy hours

The best skiers in the world train a lot, and mostly easy. A study of 11 Olympic and world champion cross-country skiers and biathletes found they trained about 800 hours a year in around 500 sessions, including about 500 hours of sport-specific training. Ninety-four percent of all training was aerobic endurance work, and roughly 90% of that was low intensity, below the first lactate threshold. The most successful female cross-country skier in history (six Olympic golds, 18 world championship titles, 110 World Cup wins) averaged 937 hours a year across her five best seasons, with about 92% of endurance time at low intensity and 65% of that easy time in sessions longer than 90 minutes.

You don’t need 900 hours. The lesson for every level is the shape: mostly easy, conversational sessions that build the engine, and a smaller amount of hard work. For adults, the U.S. Physical Activity Guidelines set a baseline of 150 to 300 minutes of moderate aerobic activity a week plus muscle strengthening at least two days a week; an adult training for a ski marathon will usually go well beyond that, building up over months. A heart-rate strap helps keep easy days easy; see our best wearables for cross-country skiers.

Roller skiing and dryland training

Most of a skier’s year has no snow. In the study of the champion female skier, training was logged as running, cycling and skiing/roller skiing, and skiers lean on roller skis to keep the movements specific through summer and fall. The Compendium shows how hard it can be: from about 5.5 METs at an easy 10–13 km/h on the flat up to 16 METs climbing steep grades. Common dryland tools:

• Roller skis (classic and skate) for technique and specific endurance. Wear a helmet and eye protection; FIS requires both in official roller-ski training and competition.
• Ski walking and bounding with poles up hills, which mimic diagonal stride.
• Running and cycling for easy volume with less upper-body load.
• Ski ergometers for double-poling work indoors.

Ease into it. Injuries in young endurance athletes cluster in pre-season, and the move from snow to pavement (or from winter to running) is when shins and knees complain. Add roller-ski and running volume gradually over several weeks.

Double-poling strength

Double poling uses the arms, shoulders, trunk and hips together, and research keeps finding that stronger is better. In an 8-week study, well-trained skiers who added upper-body strength training three times a week improved their maximal strength more than skiers who did endurance training only, and lasted about 20% longer in a double-poling test done after a long submaximal effort. In other words, strength helped them keep double poling when tired, which is exactly what the last 10 km of a marathon asks for. How do the best fit it in? A 2026 study of 17 Olympic, world championship and World Cup medalists found strength training made up about 6% of their year (around 50 hours), roughly one session every five days, mostly core and heavy strength. They did it on lighter endurance days, usually paired with an easy session, and almost never on the same day as hard intervals.

Typical strength work for skiers (general coaching practice, not a prescription): pull-downs and pull-ups, straight-arm pull-downs with a band or cable, triceps work, push-ups, trunk flexion and anti-rotation exercises, single-leg squats, lunges and step-ups for skating push, and hip and calf strength. For kids, focus on body-weight strength, coordination and fun. Resistance bands such as the Fit Simplify loop bands make straight-arm pulls and hip work easy at home; see our resistance band guide.

Technique: classic and skating

Technique is half the sport. Classic skiing (diagonal stride, kick double pole, double pole) and skating (V1, V2 and V2 alternate) each have their own timing, and the best skiers switch sub-techniques constantly with the terrain. A few ways to keep improving at any level:

• Take lessons or join a club. Short drills with a coach beat hours of practicing the same mistake.
• No-pole skiing (skating or diagonal) for balance and weight shift, and double-pole-only sessions on gentle terrain.
• Video yourself on a phone and compare with a coach or top skiers.
• Practice technique fresh, early in a session or as short pick-ups, not at the end of a hard day.

Periodization: how the year fits together

Elite skiers follow a classic periodized year. In the champion study, training volume and specificity followed a traditional model: big general-preparation volume in late spring and summer, more ski-specific and harder work in fall, then racing in winter, with volume about one-third lower in the peaking phase than in the preparation period. Altitude camps made up 18–25% of the champion female skier’s yearly volume.

A 2025 study of 17 world-class skiers looked at the day-to-day pattern and found three building blocks: days of high volume, days of elevated intensity every three to four days, and a reduced-load or rest day every eight to nine days. Only about 5% of days combined big volume and high intensity. That’s a useful rule for everyone: long or hard, not both on the same day, and a real easy day regularly.

Phase	Rough timing (Northern Hemisphere)	Focus
Transition	April–May	Rest, other sports, easy activity
General preparation	May–August	Easy volume (run, bike, roller ski), strength, technique
Specific preparation	September–November	More roller skiing and intervals, first snow
Competition	December–March	Racing, sharpening, recovery between races

For adults training for a ski marathon such as the American Birkebeiner (50 km skate or 53 km classic) or the 90 km Vasaloppet: build easy volume through fall, add one or two quality sessions a week (intervals on hills, tempo double poling), and get some long sessions on snow in the weeks before, practicing your fueling. For kids, the American Academy of Pediatrics recommends at least one to two days off a week and time off from any single sport during the year; games, varied terrain and other sports build better skiers than early heavy training.

Gear for training

Roller skis are the one piece of dryland gear most serious skiers own. The Barnett RSE-610 roller skis have an aluminum frame and NNN bindings; pair them with a helmet like the Giro Register MIPS. A heart-rate strap such as the Polar H10 keeps the easy sessions honest.

Keep going: what to eat for this much training is on nutrition and supplements, how to absorb it on recovery, and the overuse problems to watch on injuries. For a team-sport comparison, see soccer training; for downhill, ski training.

Cross-country ski training: FAQs

How many hours a year do elite cross-country skiers train?

Studies of Olympic and world champions report about 800 hours a year, and the most successful female skier in history averaged 937 hours in her best five seasons. Around 90% of their endurance training is low intensity.

Is roller skiing good training for cross-country skiing?

It’s the most ski-specific dryland training there is, and skiers use it through summer and fall for both classic and skating. It can be very hard work on climbs. Always wear a helmet and eye protection, and choose smooth, quiet roads.

Does strength training help cross-country skiers?

Research says yes, especially for double poling. In one study, eight weeks of upper-body strength training improved maximal strength and helped skiers keep double poling about 20% longer after a long effort.

How should I train for my first ski marathon?

Start in the fall, build mostly easy volume, add one or two harder sessions a week, practice double poling and fueling, and do a few long sessions on snow before race day. If you’re over 40, new to endurance events or have health conditions, see a doctor first.

Should I combine long and hard sessions?

Rarely. World-class skiers alternate high-volume days and high-intensity days, with intensity every three to four days and an easier day every eight to nine days; only about 5% of their days combine both.