A · Dumbbell
- Source
- Gravity
- Direction
- One fixed line, always down
- Behavior
- Linear and predictable
- You change it by
- Picking a heavier weight
- Asks the nervous system to
- Repeat a learned path
Gyroscopic neuromuscular training
Exercise Outside the Pull of Gravity.
A gear-driven gyroscopic device born from neurological recovery. Train neuromuscular coordination in a way ordinary weights can't.
The resistance comes from a spinning rotor, not from gravity. Precession pushes back perpendicular to your effort and keeps changing direction as your hands move.
- Rotor speed
- up to ~10,000 RPM
- Resistance
- ∝ speed²
- Input
- two hands, three axes
- Rotor
- 0.5 – 1.5 lb
Footage: Spinweight's lights at high RPM, filmed at night.
01 · Origin
Built for Survival.
I was 19 when a motorcycle crash gave me a severe traumatic brain injury. It left me with aphasia and amnesia. Part of the damage was to my corpus callosum, the bridge between the brain's two hemispheres.
One of the hardest things to recover wasn't strength or memory. It was self-regulation.
Strength training could rebuild muscle. My problem was communication: between the two sides of my brain, between thought and word, between intention and movement. Lifting a weight up and down never asked my nervous system to solve that.
Later I started training with handheld gyroscopes, and I noticed something no other workout gave me. Managing a fast, constantly shifting force seemed to switch things back on.
I had no engineering background. I taught myself on a manual lathe with off-the-shelf gears, and I kept building.
N=1 This is my personal story: one person, not a clinical trial. It's why I built Spinweight, and it's the idea I want tested properly in controlled research.
02 · The physics, simply
Gravity pulls one way.
Every weight in a gym borrows its resistance from gravity. Spinweight makes its own, from a rotor spinning up to about 10,000 RPM between your hands.
B · Spinweight
- Source
- Gyroscopic precession of a spinning rotor
- Direction
- Perpendicular to your effort, turning as your hands move
- Behavior
- Nonlinear and multidimensional
- You change it by
- Driving it faster, or changing ratio and rotor
- Asks the nervous system to
- Correct continuously, in three dimensions
Why it gets harder as you go faster
You move the handles in circles, and the gears multiply that motion into rotor speed. A spinning rotor resists being turned, and every time you redirect it, it pushes back perpendicular to the force you apply. That push is gyroscopic precession.
τ = I · ωspin · ωprecession
The gearing ties rotor speed to how fast you cycle the handles (ωspin = ratio × ωprecession). So with a fixed gear, resistance rises with the square of speed: double the speed, four times the resistance. Slow is gentle. Fast is intense.
Drive ratio: same hands, two different demands
Lighter gear
High frequency, low force. More cycles and more corrections per second, less load in each. The demand lands on coordination and processing speed.
Heavier gear
High force, lower frequency. More mechanical work in every cycle. The demand lands on muscular endurance.
All of it is delivered through the hands. You choose whether the nervous system or the muscles carry more of the work.
Gyro force calculator
Calculated, not measured- Handle force
- 79 N (17.8 lbf)
- Multiple of rotor weight
- 17.8×
- Your hand cycling speed
- 250 RPM
- Force vs. 5,000 RPM
- 2.25×
How this is calculated: the curve fits Spinweight's own force table for a rotor of about 0.75 lb (≈26 N at 5,000 RPM, ≈58 N at 7,500, ≈105 N at 10,000 RPM; dots on the chart). It follows F ≈ k·RPM², with k ≈ 1.05×10⁻⁶ N/RPM², and is scaled in proportion to the rotor weight you choose (0.5–1.5 lb, same rotor geometry assumed). “Multiple of rotor weight” divides handle force by the rotor's weight. It is not a G-load on your body. Hand cycling speed = rotor RPM ÷ drive ratio. Results are modeled values, not readings from a specific unit. They aren't dynamometer measurements, and the chart doesn't extrapolate past 10,000 RPM.
03 · Modular configuration
One Device.
No two nervous systems, or bodies, need the same stimulus. Spinweight is fitted the way a precision instrument is fitted to the person who plays it.
T-01
Rotor size & weight
From 0.5 lb for youth and rehabilitation settings to 1.5 lb for intense output.
T-02
Handle size & style
Grip diameter and shape suited to the hand using it, from a child's hand to an athlete's.
T-03
Drive ratio
Sets how much of the workload comes as fast coordination versus raw mechanical force. Current hardware runs about 30:1 to 40:1.
Change any one of these and you change how the work is split between coordination demand and muscular load. It's less like picking a dumbbell and more like choosing your paints before you start: the same canvas, a different brushstroke for your neuromuscular development.
Prototype ranges. They may change before production.
04 · Ecosystem
From one instrument
Spinweight already connects to the rest of your training. Each item carries its status, and everything here works on the current hardware.
Pairs with the rest of the gym
Treadmills, spin bikes, balance boards, bars and balls. The legs and trunk have to stabilize against the gyroscopic force while the hands drive it, so the whole body joins the problem. Watch it.
Multi-speed transmission
A light sensor reads rotor speed and a servo shifts gears, automatically or by hand, so a session can move between frequency and force without stopping.
Data
Spinweight tracks precession speed and neuromuscular output, so a session can be measured, dosed and compared over time.
Game integration
Spinweight sends motion data to a video game, so your coordination steers an avatar in a race.
05 · Evidence
What's established, what's piloted, and what's still a question.
I keep these three categories separate so you can judge each claim on its own footing.
Established peer-reviewed science
Pilot early data, N=1
Hypothesis not yet tested
-
Established
Precession physics
A spinning rotor resists being redirected with a torque perpendicular to the applied force (τ = I·ωs·ωp). With geared coupling, resistance scales with the square of speed. This is textbook mechanics.
-
Established
People learn to control hand-held gyroscopes
The nervous system learns to compensate for gyroscopic torque, and arm configuration is central to how that learning is organized.
Flanders M, Hondzinski JM, Soechting JF, Jackson JC. Using arm configuration to learn the effects of gyroscopes and other devices. J Neurophysiol. 2003;89:450–459. doi:10.1152/jn.00053.2002
-
Established
Coordination and balance training benefit the brain (general exercise science, not Spinweight-specific)
In older adults, coordination training increased hippocampal volume. Balance training improved memory and spatial cognition without changing cardio fitness. Balance and functional exercise reduced the rate of falls.
Niemann C, Godde B, Voelcker-Rehage C. Front Aging Neurosci. 2014. · Rogge AK et al. Sci Rep. 2017. · Sherrington C et al. Cochrane Database Syst Rev. 2019.
-
Pilot · N=1
VO₂ self-test
In a self-administered, video-documented VO₂ test, I burned up to 18 calories per minute using only my hands. One person, one test: an early data point, not a clinical study. Independent replication is the next step. Watch it.
-
Pilot · N=1
Founder's recovery
After a severe TBI, gyroscopic training went along with my recovery of speech and memory and with new skills (tightrope walking, juggling while standing on a ball). That's a personal account, not proof of cause.
-
Hypothesis
Coordination as the driver
Does high-frequency coordination demand add metabolic and cognitive load beyond the mechanical work performed? Does Spinweight training improve balance, cognition, or brain-injury recovery more than conventional exercise? These questions need controlled studies.
-
Hypothesis
Microgravity
Precession doesn't depend on gravity, so the same resistance should work in microgravity too. That hasn't been tested in spaceflight yet.
06 · Work with me
For the physicist, the neuroscientist and the athlete.
Researchers
A dosable, speed-controlled coordination load for studying cognitive-motor exercise, sensorimotor control and metabolic cost. The open questions above are a ready-made study list.
Discuss a study →Clinicians & rehab
Handheld and self-powered. Resistance starts gentle and rises only as fast as the user drives it, so it can be graded to the person in front of you.
Talk about a pilot →Coaches & performance
Combine it with treadmills, bikes or balance work, so athletes have to hold coordination under a shifting load and under fatigue.
Book a demo →Everyday training
A workout where coordination is the cardio. Slow and easy for beginners, sprint-level when you speed up. No heavy weights to drop.
Ask about availability →07 · Video library
See it in action.
Pilot · N=1
My VO₂ test
A self-administered, video-documented VO₂ test: up to 18 calories per minute using only my hands. One person, one test. It's an early data point, not a clinical study, and independent replication is the next step.
Open on Google Drive ↗Combine it with any workout
Balance and coordination challenges
Contact
Let's talk.
Researchers, clinicians, coaches and press are welcome. Tell me a little about what you're working on.
Chris Oremus, FounderChris@Spinweight.com
+1 (424) 303-0069
Spinweight LLC