By Nicolas Desjardins, PhD in Natural Medicine · DBA(c) · Master’s in Neuroscience (in progress), designer of the Q-Technology system. Nicolas Desjardins is not a medical doctor. October 2026.
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The short answer. At the gym, you check your load and your program, almost never the body that’s going to carry it all. In many sport settings, athletes are monitored with a wellness questionnaire, a measured jump, or both. Questionnaires track training load better than commonly used objective measures (review of 56 studies, Saw et al., 2016), and the countermovement jump is commonly used to monitor neuromuscular status (meta-analysis of 151 articles, Claudino et al., 2017). Neither tells you whether your right arm holds when someone pushes on it while your left gives way. That’s what the 120-second demo looks at, as a pre-workout test: two people, no equipment, ten tests that hold or give way, side by side.
At the gym, you check everything except the body carrying the load
You walk in, open your app, check what’s planned: squat, 5 sets of 5, so many kilos. You load the bar. Everything is under control except one thing: how the body about to get under it is organized.
Nobody taught you to look at it. The load is written on the plates, the program on the screen; your body’s organization isn’t displayed anywhere. So you assume it’s the same as yesterday, and when a session goes off the rails, you blame motivation or the program. How your body was organized that day, nobody looked.
What pre-training monitoring can do, and what it can’t DOCUMENTED
This is called readiness monitoring. Two families of tools dominate.
- Questionnaires. Saw, Main and Gastin (2016) reviewed 56 studies that measured athlete well-being at the same time through questionnaires (mood, perceived stress) and objective measures (blood markers, heart rate, oxygen consumption). The two types of measures generally did not correlate. Questionnaires tracked changes in training load with greater sensitivity and consistency: self-reported well-being dropped when load rose sharply, and improved when it decreased.
- The jump. Claudino et al. (2017) analyzed 151 articles that used the countermovement jump to monitor neuromuscular status: fatigue and supercompensation. The average height of several jumps proved more sensitive than the best height, even though 85% of the articles used the best one.
What these tools show: how you respond to load, from one session to the next, when they’re repeated under the same conditions. What they don’t show: how your body is organized. A questionnaire tells you what you feel, not what holds. A two-leg jump gives an overall height; it doesn’t say which side is pushing, and a two-leg test doesn’t always point to the same dominant side as a single-leg test (see our article on the weak side).
The warm-up prepares. It doesn’t check. DOCUMENTED
The other pre-workout ritual is the warm-up, and it has evidence on its side: a systematic review with meta-analysis included 32 studies of good methodological quality, and warming up improved performance in 79% of the criteria examined, with little evidence of a detrimental effect (Fradkin et al., 2010). The authors also note there were few well-conducted randomized controlled trials, and that more are needed.
So warm up. But the warm-up prepares the body you have that day; it doesn’t show you which one you have, or whether your left side holds like your right.
The 120-second demo: ten tests, it holds or it gives way
The demo is done by two people, standing, barefoot or in flat shoes, with nothing else. Your partner builds the pressure gradually, over two to three seconds, never with a jolt, and you both watch what happens: it holds, or it gives way. Each test is done on one side and then the other, never both at once. Here are the ten.
| No. | Test | How it’s done | When it gives way |
|---|---|---|---|
| 1 | Middle deltoid | Arm extended out to the side, horizontal, palm down. Your partner pushes your wrist down. One arm, then the other. | The arm drops, or the opposite foot moves. |
| 2 | Overhand diagonal | One arm raised diagonally forward and up, the leg on the same side extended behind you, big toe on the floor. Your partner pushes the arm down. | The arm lets go, the back leg wobbles, the body turns. |
| 3 | Hook hand | Arm along your side, hand in a hook. Your partner slides a fist into it and pushes down. | The torso collapses sideways, a foot lifts. |
| 4 | Closed fist | Arm along your side, fist clenched. Your partner grips your fist and lifts it upward. | The elbow bends, the shoulder rises, the foot leaves the floor. |
| 5 | Posterior chain | Arms extended in front of you, fingers interlaced. Facing you, your partner pushes your hands down. | You tip forward, your heels lift. |
| 6 | Anterior chain | Same feet, arms extended behind you, fingers interlaced. Behind you, your partner pushes down. | You tip backward, your knees bend. |
| 7 | Quadratus lumborum | You breathe in, then, as you breathe out, your partner pushes your shoulder sideways. | The torso tilts, the hip follows. |
| 8 | Gluteus medius | Knees slightly bent. As you breathe out, your partner pushes your hip sideways. | The pelvis gives way sideways. |
| 9 | Trunk rotation | Feet together, you turn your whole body as you breathe out, slowly, one way and then the other. | It locks before about 60° at the hips or 90° at the shoulders (a functional benchmark, not a medical standard). |
| 10 | EMF test | Test 1 is repeated on your stronger arm, then again while a phone rings in your other hand, without answering. | The arm that held gives way while it rings. |
The first nine show a general state: when one of them gives way, the possible causes are many, and the test doesn’t tell you which. The tenth is the only one that isolates a single variable, the phone’s signal. It doesn’t say waves are dangerous: it shows whether your strength holds while the phone rings (see our article on EMF hygiene).
Don’t do the demo if you’re in late pregnancy, have had recent surgery, have a current injury or a severe lower-back problem. If in doubt, ask a health professional first.
Let’s be clear about what this is. It is not a measuring instrument. A push by hand gives neither kilos nor newtons. What you get is an observation: it holds or it gives way, and on which side. To keep it useful, keep the same partner, the same angle, the same instruction, and always compare both sides back to back.
The demo doesn’t measure your readiness either, and it doesn’t tell you what load to put on the bar.
Our reading HYPOTHESIS: when a test gives way on one side and holds on the other, the body doesn’t stop, it redistributes, and the side that holds works for two. If it’s right, what you take for a plateau may be compensation. This is a hypothesis, and it may be wrong.
What we look at, and what we don’t promise
The Q-Go corrects the tests of the 120-second demo. Perfect posture, on the other hand, is what the calibrated Q-Pro aims for, chosen during the Test Posture Parfaite (see what we call perfect posture).
What we look at, before and while you wear the circuit, during the Test Posture Parfaite (fifteen minutes, with a certified tester, no equipment):
- strength and stability tests, right and left, holding or giving way;
- the tilts of the pelvis and shoulders on three planes, in centimeters;
- neck rotation, scored out of 7 on each side.
What we don’t promise: your load, your 1RM, your session. We tell you what we’ll look at, never what you’ll feel. If it shows nothing, the test is refunded.
What we observe OBSERVATION: while the circuit is worn, tests that gave way now hold, and posture reorganizes on three planes.
Functional assessment, non-medical · Before/after protocol · Observations from internal tests · Individual results vary · Not a medical claim.
In the field, 199 people out of 200 reach perfect posture with the calibrated Q-Pro (field observation, not audited).
Passive · Non-invasive · No battery · No electrode | Functional observations from internal tests | Individual results vary | Not a medical claim.
Our hypothesis HYPOTHESIS: the passive resonant circuit removes nothing and blocks nothing. It gives the nervous system a coherent, stable reference. This is a hypothesis about the mechanism, and it may be wrong.
Support, not cure. While you wear the circuit, the effect is there. Take it off, and you’re back where you started, like glasses: you wear them, you see; you take them off, you don’t. The circuit replaces neither your warm-up nor your program.
FAQ
Should I test before every session?
Nothing requires it. Teams that monitor readiness repeat their measures under the same conditions to see a trend. The 120-second demo takes about two minutes: it shows you, right now, which tests hold and which give way, on each side.
Does the pushed-arm test measure my strength?
No. A push by hand is not a measuring instrument: it gives no number. We observe whether the test holds or gives way, and on which side. During the Test Posture Parfaite, the strength and stability tests work the same way, with no equipment. Functional assessment, non-medical · Individual results vary.
I’m buying the Q-Go without a test. What if nothing changes?
When it arrives, redo the 120-second demo tests at home with a partner, without and then with the Q-Go. If they still give way while you wear it, submit your request within 30 days: a free verification video call is provided, and the circuits are refunded after a complete return. Insoles are excluded from this guarantee (article 29 bis of our terms of sale).
Can I wear the circuit in training and in competition?
Passive circuit: no substance. Check with your federation.
How can I check for myself?
Book a Test Posture Parfaite: fifteen minutes, €33, with a certified tester. You compare your tests, right and left, before and while wearing the circuit. If it shows nothing, it is refunded.
Your program checks the load. Come and check the body carrying it: book your Test Posture Parfaite, refunded if it shows nothing.
Sources
- Saw AE, Main LC, Gastin PB. Monitoring the athlete training response: subjective self-reported measures trump commonly used objective measures: a systematic review. Br J Sports Med. 2016;50(5):281-291. https://doi.org/10.1136/bjsports-2015-094758
- Claudino JG, et al. The countermovement jump to monitor neuromuscular status: A meta-analysis. J Sci Med Sport. 2017;20(4):397-402. https://doi.org/10.1016/j.jsams.2016.08.011
- Fradkin AJ, Zazryn TR, Smoliga JM. Effects of warming-up on physical performance: a systematic review with meta-analysis. J Strength Cond Res. 2010;24(1):140-148. https://doi.org/10.1519/JSC.0b013e3181c643a0
