TorsoSpin FAQs | Answers About Your Upper Body Cycle

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The Vision

After surgery that sidelined me for 6 months from any lifting, I wanted a way to get back in shape but never liked weights or circuit-training. I was aware of arm cycles used by physical therapists for rehab, so I rigged my exercise bike to be pedaled with my arms while kneeling behind it. Awkward, but I was astounded by the broad-reaching effects on my upper body and how enjoyable it was. Searching on the web, I found two extremes -- the bulky, expensive upper body cycles used in PT and offered in some gyms, and the cheap, insubstantial arm cranks that sit on tables offering little serious resistance. I wanted something better, something reasonably priced that could help a broad range of people get the daily upper body exercise that is essential to feeling good and being healthy.

To make the cycle robust yet affordable, I thought I should build on existing technologies and components. So I married the body of an exercise bike to a weight bench. You might want to try that yourself from some old equipment. But I spent more than 18 months experimenting with different configurations to achieve something easy and enjoyable to use, effective for both joint and muscle conditioning, and then made adjustments and tweaks to make the Cycle relatively easy for the company to assemble, manageable to ship economically, and easy for the user to set up.

The idea was conceived and the original R&D done in my 19th century barn on Cape Cod. We import the components from China, by far the major global source for exercise equipment, and pay heavy tariffs to do so, having found no good alternative. The final assembly, inspection and packaging of each Cycle, which involves several hours of labor, is done off-Cape in the bustling Plymouth County, Massachusetts.

"We transform standard exercise equipment, a bike and a bench into an exhilarating, highly effective upper body machine. By using standard components, we deliver affordability. You will see evidence of its former shape and function, while feeling its new powers."

TorsoSpin harnesses the power of rhythm and dance to make exercise exhilarating and mesmerizing. Rhythm acts as a direct link into the human nervous system. When moving with a distinct rhythm, the dancer experiences a biological phenomenon known as entrainment-where internal bodily frequencies (such as heart rate and neural oscillations) lock into unison with the external beat.

Slowing Down Brainwaves: Research demonstrates that rhythmic stimulation can shift brain activity out of the analytical, high-frequency Beta wave state (associated with stress and overthinking) and transition it into relaxed Alpha (8-12 Hz) or deeply meditative Theta (4-8 Hz) states.
The Neurochemical Cocktail: The physical exertion triggers an immediate surge of feel- good chemicals: endorphins provide a natural "runner's high"; dopamine spikes through an unscripted loop of predicting, subverting, and satisfying the musical rhythm; and serotonin acts to stabilize mood and alleviate anxiety.

The Model 100 provides all the functionality in a lower cost package by utilitizing an exposed frame and friction resistance. Friction resistance occasionally (but very seldom) requires the felt pad to be replaced, and it makes a gentle rubbing noise that magnetic resistance avoids. Some people want the maximum quiet of magnets; others easily ignore the rub or wear earphones that cancel it.

Model 300 uses magnets and a covered frame; an extra large,sturdy bench; and greater resistance. It is recommended for anyone taller than 6 feet but can be used by anyone. For a shorter person, the only disadvantage could be difficulty in straddling the wider bench in a few of the exercise positions.

When comparing the high-velocity, light-to-moderate "pump" style of TorsoSpin freestyling to traditional heavy lifting (such as slow, grinding barbell squats or heavy presses), you are ooking at a classic matchup of Velocity vs. Mass. Both approaches build muscle and strengthen the skeletal system, but they utilize entirely different physiological mechanisms to get there.

Your muscles cannot see what you are lifting; they only respond to the type of internal stress they experience.

TorsoSpin High-Velocity Pumps (Metabolic Stress): Moving a light-to-moderate resistance at an explosive pace acts as a one-way valve for blood flow. It rushes fluid into the working muscles but prevents it from leaving easily, creating localized hypoxia (low oxygen) and a massive buildup of metabolites like lactate. This cellular swelling stretches cell walls from the inside out, triggering protein synthesis to expand the fluid volume of the muscle cell (sarcoplasmic hypertrophy). It builds a full, sculpted appearance without adding bulky, dense fiber mass.
Traditional Heavy Lifting (Mechanical Tension): Heavy, slow "grinds" force your brain to instantly recruit high-threshold, fast-twitch Type Il muscle fibers. The heavy resistance strains the actual structural protein strands (actin and myosin), causing micro-tears that force the body to build thicker, denser, and stronger muscle fibrils (myofibrillar hypertrophy). This results in raw physical strength and dense muscle mass.

TorsoSpin High-Velocity Pumps: Because the resistance is kept light-to-moderate, your joint spaces are not subjected to crushing structural loads. The movement relies on speed and acceleration, making it incredibly joint-friendly and highly accessible for daily use without risking acute joint strain or requiring long recovery windows.
Traditional Heavy Lifting: While excellent for joint and tendon structural integrity over time, heavy lifting places a massive amount of absolute compressive stress on the joints. If form breaks down under a heavy load, the risk of acute injury to the lower back, knees, or shoulders is significantly higher.

If you have a stouter, heavier build, the Model 300 is actually highly recommended, regardless of your height. The heavy-duty bench and wider footprint provide maximum stability. When you are exerting high rotational force or doing high-intensity intervals, a sturdier base ensures the machine remains completely planted and won't rock or shift. Standard models might feel less secure under high-torque lateral movements if you are close to their weight thresholds.

Technique & "The Ride"

Not at all! You don't need to be a puddle of sweat to see the benefits. Think of it as "tuning up" your upper body. Just the movement with light resistance will lubricate your joints and infuse your muscles with blood. Yet if you want to maximize your strength, you can turn up the resistance and even “feel the burn.”

Take your choice -- or better yet, do some of both. First, we encourage you to let it flow with some "sway and bob." It’s meant to mimic natural body mechanics. If you let your shoulders and hips move naturally, you’ll engage your core, get more mobility, and have a more comprehensive workout. Second, when you want to build maximum strength, hold the spine still and feel the effort in your arms and shoulders, using the underhand pull to focus on the biceps then switch to an overhand pull for the triceps.

Again, take your choice. A pump (or quick pulse) is great for maximizing the effort through the muscular chain from hands to buttocks. Constant pressure against constant resistance builds endurance and can increase the cardiovascular benefits. I do both.

Try both at different times. Alternating makes you overcome the resistance with just one side of your body, maximizing impact on the whole chain. Doing both sides at once, particularly at high resistance, focuses effort in the arms and shoulders while stabilizing the spine.

That’s just physics meeting intensity! To keep it in place, use it on a yoga mat or a small rug. When using certain standing positions, you will want to steady the bench between your legs, providing exercise for your inner thighs.

When seated, slide closer to the pedals, raising the bench if needed. If you can not reach the pedals overhead when lying on your back, simulate the same “angle of attack” by lowering the bench and, seated facing the pedals, move your bum back until your arms are comfortably stretched overhead.

One of our favorite moves is to "bob and weave" -- that is, move the hips up and down and side to side to the beat of the music, whether standing, kneeling or on our back doing a bridge. Not only is this "dance" a lot of fun, it also gently stretches and strengthens the side (oblique) and core muscles of the torso. It even tones and strengthens the glutes. An all-around winner!

We have found that pumping to the beat of your music is the most enjoyable and sustainable exercise, with strengthening jolts interspersed with brief rests. This can be done unilaterally (one arm at a time), activating one side of the body, then the other. Or it can be done bilaterally (both arms at once), making each rotation both a pull and a push. Pumping encourages greater joint movement and flexibility while doing some serious strengthening.

However, if your goal is to maximize arm, shoulder and chest bulk, holding your head and spine still while steadily pulling and pushing with both arms simultaneously, can result in the most results (and produce the "burn.")

If you wish to build maximum arm and shoulder strength, isolate those muscles by holding your head and back still as you cycle. Increase the resistance if you wish, and feel the "burn." This tactic can be executed either cycling forward or backward, with either an overgrip or an ndergrip. Doing some of each variation insures the broadest impact on your arms and shoulders.

This is intense exercise and you do not need to sustain for long - in fact, 15 or 20 second high intensity spurts, followed by rest periods of slower full body movement, would work well. Be aware, however, that you should not try to attain the maximum heart rates you attain in traditional lower body sprints - your upper body has smaller vessels and the heart must work harder to pump blood through them, so you do not want to push it as hard as in traditional HIIT.

Instead of just passively resting your hands on the handles, actively engage your grip. Consciously squeezing the handles during your pumps forces your forearms and grip stabilizers to work against the shifting resistance of the machine, turning your session into a stealth forearm workout.

Health & Recovery

Upper body cycles, in general, are usually great for back issues because they provide cardio without the impact of running, and hands-on pedals control your degree of motion even when swaying and bobbing. That said, I’m an inventor, not a doctor, so please check with yours and start cautiously.

The Cycle has definite cardio benefits but don’t rely on it for your full cardio workout. Walking, running, and bicycling engage the largest muscles of the body and thus are among the best ways to raise your heart rate.

We do not recommend HIIT on TorsoSpin despite it being technically possible. Upper body HIIT is more stressful on the heart than lower body HIIT because the heart needs to force blood through what are generally smaller veins, causing greater spikes in blood pressure. Save your HIIT for standard cycling or running.

For Low-Resistance Mobility Training: Daily use is perfectly fine if you are using it at a light to moderate setting to loosen and lubricate muscles and connecting tissue. Daily use in this way will gradually improve muscle strength and tone.
For High Resistance Strength Training: Limit it to 3 to 4 times a week. Your muscles need time to recover and rebuild between heavy workouts. Best to use lighter resistance on the other days, to keep your muscles and joints limber.

Start light. Rotational training recruits smaller, deep stabilizer muscles that are often neglected in standard workouts. If you go too heavy too soon, larger muscle groups will take over. Find a resistance level where you can maintain posture and a fluid, smooth motion, then progressively increase the tension over time.

Magnetic Resistance: Generally superior. It provides a completely smooth, near-silent operation, requires virtually zero maintenance, and allows for precise, repeatable micro-adjustments.
Friction Resistance: Usually more budget-friendly and can technically offer a higher "infinite" top-end resistance. However, it can feel less smooth, makes more noise, and the pads will eventually wear down and need replacement.

Bone is a living tissue that responds to mechanical loading through steogenesis (the formation of new bone by osteoblasts). The stimulus for bone formation is mechanical stress-specifically, forces applied to bone that exceed routine loading levels. This is the "use it or lose it" principle applied to the skeletal system.

TorsoSpin training does not provide the compressive loading of weight-bearing exercises but does provide muscular tension loading (the pull of contracting some muscles on bone at attachment sites), particularly in the arms and shoulders during pumping. It is best to complement TorsoSpin workouts with brisk walking, jogging or jump rope to stimulate bone formation in the legs and hips.

Here is how Gemini compares the effects on bone density of TorsoSpin pumping freestyle versus traditional weight lifting.

TorsoSpin High-Velocity Pumps (Tensile "Snap"): Bones ignore slow, gradual pressures, but they react intensely to sudden, explosive spikes in force. The rapid "pumps" create high-velocity tensile shockwaves where the tendons anchor to the bone, slightly deforming the bone matrix to signal osteoblasts to lay down new bone mineral. Because of TorsoSpin's diverse "angles of effort" (changing from standing to kneeling, supine, or seated), this bone-building benefit is distributed in a 3D matrix across the spine, ribs, shoulders, and hips.
Traditional Heavy Lifting (Axial Impact/Load): Heavy lifting triggers bone density primarily through high-magnitude compressive load. Placing a heavy barbell on your back forces the spine and hips to bear a massive vertical weight against gravity, pushing down through the femur and tibia. It is highly effective, but it is largely directional (top-down) rather than multi-directional.

Yes, but always consult your physical therapist or doctor first. At low resistance, the TorsoSpin is excellent for gently introducing movement, increasing blood flow, and restoring mobility to a tight or recovering back. However, if you are dealing with an acute disc injury or severe sciatica, rotational forces can sometimes aggravate the issue if not carefully monitored.

When you don't use your muscles, they go through a process called disuse atrophy. Your body operates on a strict "use it or lose it" efficiency model-maintaining dense muscle tissue requires a lot of metabolic energy, so if a muscle isn't being actively challenged, the body starts breaking down its protein fibers to conserve resources.

Here is a breakdown of what happens internally, how the timeline unfolds, and why unused muscles eventually cause pain.

The Biological Cascade: What Happens Inside
When muscle fibers stop contracting against resistance:

Protein Breakdown Outpaces Synthesis: Muscles are in a constant state of turnover. Disuse shifts the balance so that muscle proteins are degraded faster than new ones are built.
Loss of Contractile Mass: Individual muscle fibers shrink in diameter (though the actual number of cells doesn't immediately vanish, they just become hollowed-out versions of themselves).
Connective & Fatty Infiltration: Over extended periods, lost muscle tissue gets partially replaced by adipose (fat) tissue and fibrous collagen, making the muscle stiffer and less elastic.
Mitochondrial Decline: The energy factories within the muscle cells drop in quantity, reducing the tissue's endurance and ability to process oxygen.

Timeline: What Happens Over Time
The rate of atrophy can be surprisingly fast depending on the level of immobility:
Days 1 to 7 (First Week): Loss of muscle strength begins almost immediately. Studies show you can lose 0.5% to 1% of total muscle mass per day during complete bed rest or immobilization (like having a limb in a cast).
Weeks 2 to 4: Visible shrinking (wasting) becomes noticeable. Neural signaling between the brain and muscle weakens, meaning even when you try to flex, fewer muscle units respond efficiently.
Months 1 to 6+: Progressive weakness reaches a critical threshold. Joint stiffness sets in, and movement requires significantly more effort, leading to rapid physical fatigue.

Curiously, muscles themselves rarely hurt simply from sitting idle. The actual pain comes from the secondary chain reactions caused by their weakness:

1. Joint Strain and Structural Overload
Muscles act as dynamic shock absorbers for your frame. When muscle support thins out, your skeleton and joints take the brunt of gravity and movement.

Example: Weak core and glute muscles force the spinal ligaments and lower back joints to bear unnatural loads, leading to chronic lower back ache.

2. Muscle Tightness and Shortening (Contractures)
Unused muscles tend to adaptively shorten over time. This loss of flexibility pulls tightly on tendons and bony insertion points, causing persistent, dull aches and stiffness when you try to stretch or move normally again.

3. Overcompensation by Neighboring Muscles
When one muscle group atrophies, surrounding muscles have to work twice as hard to stabilize your body. These overworked helper muscles develop trigger points, spasms, and fatigue-induced pain.

4. Poor Circulation and Stiffness
Active muscle contractions act as a biological pump, driving venous blood and lymphatic fluid back toward your heart. Inactivity leads to fluid stagnation, mild swelling, and stiffness that can feel like an ache.

The Good News: Disuse atrophy is largely reversible. Because the muscle cell nuclei often remain intact, "muscle memory" allows previously trained or healthy muscles to regain size and strength much faster than it took to build them initially once movement and resistance training resume.

When tendons, ligaments, and joints are not regularly exercised or moved through their full range of motion, they undergo significant structural, functional, and biochemical changes.

Because these connective tissues rely on physical movement and mechanical tension to stay healthy, lack of exercise triggers a cascade of stiffness and vulnerability.

Here is what happens to each component over time:

1. What Happens to Tendons and Ligaments
Tendons (which connect muscle to bone) and ligaments (which connect bone to bone) are made primarily of dense collagen fibers. When left unexercised:

Decreased Stiffness and Tensile Strength: Without regular tension and load, the body synthesizes less new collagen. The existing collagen fibers become disorganized, leading to a loss in tensile strength and making tendons and ligaments weaker and more prone to strain or tearing when sudden force is applied.

Loss of Elasticity & Shortening: Muscles and tendons that sit idle tend to adaptively shorten. This loss of flexibility creates persistent tightness and pulls tightly against bony attachment points, often manifesting as dull, chronic aches.

Sluggish Healing (Low Vascularity): Connective tissues already have limited blood flow compared to muscle. Movement and muscle contractions act as a mechanical pump to drive blood, nutrients, and fluids through these tissues. Without exercise, collagen turnover slows significantly.

2. What Happens to the Joints
Joints require physical movement to maintain lubrication, cartilage health, and alignment:

Joint Stiffness and Reduced Range of Motion: Unused muscles and tendons shorten and stiffen, restricting the full rotational range of joint capsules. Over time, this leads to structural contractures and rigid, uncomfortable joint movement.

Increased Joint Strain and Structural Overload: Healthy muscles act as dynamic shock absorbers for your skeletal frame. When muscle mass and joint-stabilizing tissues atrophy or weaken, your cartilage, ligaments, and spinal discs take the brunt of
gravity and everyday loads.

Poor Fluid Circulation: Joint cartilage lacks its own direct blood supply and relies on the "sponge effect" of joint movement to compress and release synovial fluid. Static, unexercised joints experience fluid stagnation, leading to joint stiffness, swelling, and increased friction between joint surfaces.

Overcompensation by Neighboring Structures: When a joint becomes stiff or weak, neighboring muscle groups and secondary joints are forced to overcompensate, often developing trigger points, muscle spasms, and fatigue-induced pain.

Key Takeaway: While disuse causes connective tissues to become stiff, brittle, and structurally compromised, gradual movement and controlled resistance training help stimulate collagen repair, restore joint fluid circulation, and rebuild dynamic joint stability.

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