Repeatability decides, not maximal strength: how to build upper-body muscular endurance, when heavy lifting pays off and how much you actually need.
Strength training in biathlon is 80 percent upper-body muscular endurance and only a small remainder maximal strength — because on the track you are not carried by one strong pole push, but by a thousand equally clean ones. That is the whole difference between a plan that works and one that merely exhausts.
The evidence for it is unspectacular and therefore convincing: in skating, peak pole forces lie between 18.9 and 31.5 percent of body weight [2]. That is far from what you can move in the gym. The pole push is not a maximal strength task. It is a repeatability task.
Fittingly, training research in cross-country skiing shows: upper-body muscular endurance training improves performance after 50 minutes of double poling in well-trained skiers [1]. And in female skiers, upper-body sprint-interval training raises both strength and endurance capacity [1].
Why sacrifice time for it at all? Because pure skiing time explains 84 percent of the time differences between athletes [4]. Strength is not a side show in biathlon — it is work on the variable that dominates the race.
An honest note up front: the studies cited come from cross-country skiing. The transfer is admissible because biathlon is skied in exactly this free technique [3] — but it is a transfer, not biathlon-specific proof.
Before you do a single repetition: skiing time makes up 86 percent of total race time and explains 84 percent of the time differences [4]. Everything that keeps your propulsive output stable across a full race duration pays directly into that variable.
That is also your filter: exercises that never find their way onto the track are cut.
Pole forces in skating sit at 18.9 to 31.5 percent of body weight [2] — at 75 kilograms that is roughly 14 to 24 kilograms per push. No feat of strength. But you repeat it across kilometres, uphill, with rising fatigue.
Translated to the gym: many repetitions in the correct movement direction, clean through to the last set. The V1 gear places one double-pole push on every second leg push, the V2 gear one per leg push [2] — both live off the same repeatable pulling movement.
The best-documented effect: upper-body muscular endurance training improves performance after 50 minutes of double poling [1]. Not performance in the first sprint — performance once it has been going on for a long time. That is exactly where races are decided.
In practice that means sets in the high repetition range, short rests, focus on technique rather than load. If your last set looks worse than your first, it was too heavy.
Heavy strength training up to around 12 repetition maximum is the common model for developing double-poling performance — but with very heterogeneous effect sizes, from large to trivial [1]. Honestly: it can do a lot, but it does not have to.
Upper-body sprint-interval training is the second documented option and raises strength and endurance capacity [1]. Take one of the two as a supplement, not both at once as your core.
Your endurance structure stays as it is: around 80 percent below the first threshold, 20 percent above the second [5]. Strength sessions belong on hard days or straight after them — not in the easy ones, otherwise those are no longer easy.
Uphill double poling already costs you noticeably more: energy cost plus 18 percent, heart rate plus 9 percent compared with the leg-driven variant [3]. Anyone who lifted beforehand is no longer doing a base session.
In the Swedish cross-country national team, 75 percent of all injuries were overuse injuries [6]. Strength work for core, hips and ankles is therefore not only performance work but durability work.
Strength training is the part of biathlon training with the greatest injury potential from poor technique — particularly in heavy pulling and pressing. Have the basic lifts shown to you properly once before you add load.
Do not increase volume and intensity at the same time. And if shoulder, elbow or lower back complain for days: get it checked instead of training through it — 75 percent of injuries in the cross-country squad were overuse injuries [6], and that is exactly how they develop.
For combination sessions with shooting, nothing changes: shooting happens exclusively at supervised ranges under supervision. Fatigue from strength training is no reason to alter that order.
Test your strength gains where they count: with a fatigue test instead of a maximum test. Ski 40 to 50 minutes easy in double poling on roller skis and add a short, hard section at the end — always the same climb, always the same length.
The information is not the time on that final section but the difference to the same section done fresh. If that gap narrows over the months, your muscular endurance training is doing exactly what it should [1].
Upper-body muscular endurance. It demonstrably improves performance after 50 minutes of double poling in well-trained cross-country skiers [1] — precisely when races are decided. The reason lies in the forces: peak pole forces in skating are only 18.9 to 31.5 percent of body weight [2].
Sometimes markedly, sometimes barely. Heavy strength training up to around 12 repetition maximum is the common model for double-poling performance, but reported effect sizes range from large to trivial [1]. Treat it as a supplement with outcome checks, not as your foundation.
Two fixed sessions per week are a good frame — the key is that they do not eat your polarised endurance structure: around 80 percent of training belongs below the first threshold, 20 percent above the second [5]. So place strength on hard days, not inside easy sessions.
Yes. What matters is the movement direction of the double-pole push and its repeatability, not the equipment — pull stations, elastic cords and bodyweight work cover the core [2]. The documented formats are muscular endurance and sprint intervals for the upper body [1], both feasible without heavy barbells.
It at least addresses the right category. In the Swedish cross-country national team, 75 percent of all injuries were overuse injuries [6] — consequences of repeated load, not single accidents. Core, hip and ankle work therefore belongs firmly in the plan, but it is no substitute for sensible volume management.
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