Elastic Resistance

How the resistance behaves

A band’s tension rises with how far it is stretched. Resistance is therefore lowest at the start of a repetition and highest at the end.

For the neck this is a reasonable match. The cervical musculature is generally strongest near neutral and weaker toward end range — but the joint is least tolerant toward end range, which is where the band pulls hardest. The two effects work against each other, and the practical consequence is that band work should still be kept in the middle of the range rather than run to the end of the stretch just because the band allows it.

Bands are also portable, cheap, and safe to fail with. If you lose control of a band-loaded rep, nothing falls. That is not a trivial advantage for someone learning to train a neck alone.

The ceiling, measured twice

This is the part that matters, and it is unusually well established for a question this specific.

First measurement — what the exercise produces. Researchers used electromyography to measure what fighter pilots’ necks do during actual aerial combat manoeuvres, then measured what gym exercises produce in the same muscles.

In-flight demand: roughly 15% of maximum voluntary contraction at 1 G; 9–40% at 3 G; 16–53% at 5 G, with the sternocleidomastoid ranging as high as 83%.

Elastic band resistance produced approximately 15% MVC — regardless of grade. Green, blue or black made no meaningful difference. A resistance machine at 50% of a three-repetition maximum reproduced the 3–5 G band; at 70% it exceeded it; at 90% the cervical erector spinae reached 93% MVC.

Netto KJ, Burnett AF, Coleman JL. Neck Exercises Compared to Muscle Activation During Aerial Combat Maneuvers. Aviation, Space and Environmental Medicine, 2007;78(5):478–484.

The authors’ conclusion was that elastic band work “could be useful for initial training… or rehabilitation from Gz neck injury” — an on-ramp, explicitly.

Second measurement — what the training produces over time. Ninety-five aviation cadets were randomised to weighted helmet, progressive elastic bands, or control for twelve weeks, three sessions a week. The band group progressed through Thera-Band colours from blue to gold.

Both groups improved neck strength. Only the weighted group kept improving on endurance. The band group plateaued after week six and its effect size fell by more than half.

Luo H, Zhao D, Jia X. The effects of different neck training methods on the neck function of aviation cadets. Scientific Reports. DOI 10.1038/s41598-025-34819-1.

Two studies, different countries, different methods, different measurements — and the same conclusion arrived at independently. That is about as good as evidence gets in a literature this small.

Why “just use a heavier band” does not fix it

The intuitive response is to buy a stronger band. The Netto data suggests this does not work as well as expected: band grade made little difference to measured muscle activation.

The likely reason is geometric. To load the neck with a band you must anchor it and position yourself at a distance where the band is stretched enough to produce tension but not so far that you cannot get into position. That geometry constrains how much of any band’s tension curve you can actually use. A stronger band mostly means standing closer, which puts you lower on its tension curve.

The cadet trial did progress its band group properly — blue through to gold, on the same advancement criteria as the weighted group — and the effect still decayed. Progression was not the problem.

Where bands are genuinely the right answer

Your first weeks of loaded training, after isometrics and before anything heavier.

Rehabilitation, which is what the Netto authors explicitly recommended them for. Low activation is a feature when tissue is healing.

Travel. A band weighs nothing.

High-repetition endurance work as a supplement to heavier training rather than a replacement for it.

Warming up before loaded work.

When to move on

Roughly six weeks of consistent band training, or the point at which your top band no longer feels demanding through the middle range — whichever comes first. The cadet data puts the plateau at week six with some precision.

What to move to depends on what you are training for. Weighted headgear has the best evidence behind it. Harnesses are the most versatile and accept the largest range of load. Both accept increments a band cannot.

An honest note

This site is published by a company that sells neck-training equipment including harnesses designed to be used with elastic resistance. The evidence above sets a real limit on what elastic resistance achieves, and it is reported here because it is what the studies found.

The limit is about the resistance modality, not about any particular harness — a harness that accepts a cable or a weight is not subject to it. But if your setup is elastic-only and you have been training for more than a couple of months, the research says you are probably at the ceiling.