exercise bikes and spinning

An exercise bike covers cardiovascular work from a seated position, with the load concentrated on the legs and the smallest footprint of the cardio machines. Four configurations share the name, with different postures and different uses.

The upright reproduces a city bike position. The recumbent has a seat with a backrest and the pedals in front. The indoor, or spin bike, reproduces a racing position with a heavy flywheel. And the aquatic is used submerged in a pool.

Upright or recumbent

This is the first choice, and it depends on posture rather than intensity.

The upright keeps the torso vertical or slightly forward, with the pedals below the body. It is the most compact configuration and the most immediate to use, and it covers general cardiovascular training.

The recumbent places a seat with a backrest and the pedals in front rather than below. Body weight rests against the backrest instead of loading the hands and wrists, and getting on and off does not require stepping over the frame. It is the configuration chosen where a supported seated posture is preferable, and it takes up more floor length.

Indoor cycling and spin bikes

The indoor bike, also called a spin bike, reproduces a road bike position: low handlebars, a saddle adjustable on two axes and a heavy flywheel connected directly to the pedals.

Flywheel weight is the figure that defines it. Light flywheels make pedalling feel broken at high cadence; from mid-range weights upwards the motion stays smooth and the machine supports standing out of the saddle, which is what separates a spin bike from an upright.

The brake type completes the picture: friction, with a pad acting on the flywheel, or magnetic. Friction gives progressive, continuous resistance but involves contact wear and periodic pad replacement. Magnetic has no contact, runs quietly and needs no brake maintenance.

Connectivity: Bluetooth, FTMS and apps

This is what buyers ask about most, and where data sheets are least clear.

A console with Bluetooth transmits session data to an app or an external device. But the connection alone is not enough: what matters is the protocol. FTMS is the standard that lets an app control the machine's resistance rather than only read its data, which is what makes guided routes with automatic resistance possible.

The practical point to check on the data sheet is which protocol the machine supports, because that determines which apps actually work with it. A Bluetooth console using a protocol the app does not recognise will send data but will not allow guided sessions.

Models with a multimedia screen build the application into the machine itself, without depending on an external tablet.

Transport wheels and footprint

An exercise bike weighs more than it looks, and transport wheels are the detail that decides whether the machine gets moved or stays where it was assembled.

They are two small wheels on the front upright: tilting the machine transfers the weight onto them and one person can move it alone. Without wheels, a bike with a heavy flywheel takes two people.

For home use in a shared space they are decisive, and it is worth checking the data sheet because not every model has them. Folding models reduce the footprint at rest further, usually with lighter flywheels.

Aquatic exercise bikes

Alongside the dry-land range there are aquatic exercise bikes, designed to be used submerged in a pool.

Water provides the resistance, so these machines have no flywheel and no brake system: the load comes from the depth and the speed of the movement. They are chosen on different criteria — corrosion resistance, stability on the pool floor and how they are moved in and out of the water — and belong to a different setting: pools, hydrotherapy and aquatic rehabilitation.

Because they sit in water and are handled wet, the material of the frame and of the fixings is the first thing to check on the specification.

Home or gym use

The distinction reads from two figures on the data sheet: maximum user weight and expected hours of use.

A home machine is sized for sessions spread across the week. A machine for a shared room has to take continuous use by different users, which translates into a sturdier frame, a heavier flywheel and replaceable components.

The rest of the cardio range sits across the cross trainers and elliptical machines and the treadmills, which cover the same work through different movements.

Exercise bike, cross trainer or treadmill

The three machines are chosen by movement rather than by intensity.

An exercise bike works seated, concentrates load on the legs and has the smallest footprint of the three. A cross trainer keeps the user upright and engages arms and legs with no ground impact. A treadmill reproduces running with impact, which makes it specific to those training to run.

In a room with several stations, the exercise bike is the one that allows the most units to be installed in the same floor area.

Frequently asked questions

What is the difference between an upright and a recumbent exercise bike?

Posture. The upright keeps the torso vertical or slightly forward with the pedals below the body, and is the more compact configuration. The recumbent has a seat with a backrest and the pedals in front: body weight rests against the backrest instead of loading the hands and wrists, and getting on does not require stepping over the frame. The recumbent takes up more floor length.

What flywheel weight does a spin bike need?

Light flywheels make pedalling feel broken at high cadence. From mid-range weights upwards the motion stays smooth and the machine supports standing out of the saddle, which is what separates a spin bike from an upright. Read it together with the brake type, friction or magnetic.

What do Bluetooth and FTMS mean on an exercise bike?

Bluetooth transmits session data to an app or external device, but on its own it is not enough: the protocol is what matters. FTMS is the standard that lets an app control the machine's resistance rather than only read its data, which makes guided routes with automatic resistance possible. The data sheet should state which protocol is supported, because that determines which apps work.

Friction or magnetic brake: which is better?

Friction gives progressive, continuous resistance through a pad acting on the flywheel, but involves contact wear and periodic pad replacement. Magnetic has no contact, runs quietly and needs no brake maintenance. For shared or home use, magnetic reduces upkeep.

What are transport wheels for?

They are two small wheels on the front upright: tilting the machine transfers the weight onto them so one person can move it alone. Without wheels, a bike with a heavy flywheel takes two people. For home use in a shared space they are decisive, and it is worth checking the data sheet because not every model has them.

What is an aquatic exercise bike?

It is an exercise bike designed to be used submerged in a pool. Water provides the resistance, so it has no flywheel and no brake system: the load comes from the depth and the speed of the movement. They are chosen on corrosion resistance, stability on the pool floor and how they are handled in and out of the water, and belong to the setting of pools, hydrotherapy and aquatic rehabilitation.