Eight months without snow are no break: how matting and roller skis carry the year — and why summer improves economy rather than the engine.
Short answer: in summer a combined athlete does exactly what they do in winter — only on a different surface. Plastic matting makes jump training and even summer competitions possible, and roller skis replace the track [1]. There are no eight months off in this sport. There are eight months of work without spectators.
And summer is not the weaker season, it is the decisive one. Seven elite combined athletes had their roller-ski economy measured in spring and again in autumn — at the start and at the end of the snow-free phase. The result: economy improved significantly at every speed tested towards the competition season, carried by the anaerobic energy contribution, while the aerobic contribution stayed unchanged [2].
Translated: over the summer the engine does not get bigger, it gets more frugal. And because Nordic combined has two engines, that happens twice in parallel — on the matted hill and on the asphalt.
Anyone who merely "stays in shape" over the summer gives away the phase in which economy is built [2]. Federation frameworks define age- and development-appropriate training for this period — a real plan, not filler [1].
On plastic matting jumping goes on all year, competitions included [1]. The benefit is not only continuity but calm: do a hundred jumps on a small facility in July and you stand on the bar far more relaxed in January. The progression stays the same — smallest hill first, next size only when ready [1].
Over 65 percent of world-class endurance training is skis or roller skis in skating [3]. Running and cycling keep you fit, but they do not train the movement that counts.
That is exactly how the elite does it: roller-ski step tests at the start and at the end of the snow-free phase [2]. On top comes jump imitation, measured two to three times per season at elite level [3]. Two numbers, two dates — nothing more is needed.
What changes in a successful summer is economy and anaerobic contribution, not necessarily the aerobic value [2]. If your endurance value is unchanged in autumn but your speed at the same effort is higher, your summer worked.
Roller skis are among the underestimated risks of summer. Most models have no brake, you are often on public roads or cycle paths, and a fall on asphalt is a different thing from a fall in snow. Helmet, gloves, visibility and a deliberately flat, low-traffic route at the start are mandatory. (Practice recommendation, not a study finding.)
For the jumping half the rule is unchanged: this page explains and motivates, it never replaces supervised training on the hill with a club and a qualified coach. On matting too, the crash landing is the most common injury mechanism on the hill [5] — the surface changes the calendar, not the risk pattern.
And because strength and jump volume rises in summer [4]: tendons adapt more slowly than muscles. Increase jump series over weeks, not over sessions.
Set up a fixed roller-ski reference loop — same route, same time of day, similar conditions — and ride it flat out exactly twice a year: once in spring, once in autumn. Note both the time and the effort, not just the time.
That is precisely the design used in the study of seven elite combined athletes, where economy improved significantly towards the season [2]. You do not need a lab to make the same effect visible — you need the same loop twice and the discipline not to ride it more often.
Both halves, continued. Plastic matting enables jump training and even summer competitions, and roller skis cover the cross-country part [1]. Over 65 percent of world-class endurance training is ski or roller-ski skating anyway [3], and much of the roughly 18.4 strength and jump hours per year falls into this period [4].
Yes, on matted hills — that is normal operation, summer competitions included [1]. The progression is identical: smallest hill first, next size only when ready, always supervised [1].
They help the aerobic base, but not the sport. Over 65 percent of world-class endurance training is done on skis or roller skis in skating [3] — the movement itself is part of the training stimulus.
By economy, not by the aerobic value. In seven elite combined athletes, roller-ski economy improved significantly at every speed between spring and autumn, the anaerobic contribution rose and the aerobic contribution stayed unchanged [2]. Same speed at less effort is the right signal.
Rarely and identically. The elite runs roller-ski step tests in spring and in autumn [2] and jump imitation two to three times per season [3]. Testing more often does not produce better information, only more noise.
The Combined Athlete's Body: Light Enough to Fly, Strong Enough for 10 K