Fitness equipment consoles present every number with equal confidence. Speed, distance, calories, heart rate and watts all appear in the same display, in the same style, updating at the same rate. They are not equally trustworthy, and the differences between them are large.
The three tiers of console figure
| Tier | Examples | What it means for you |
|---|---|---|
| Measured | Belt speed, time, stroke rate, resistance level, cadence | Derived directly from something the machine physically senses. Trust it. |
| Derived from a measurement | Power in watts on a calibrated rower or bike; distance on a treadmill | A calculation from a real measurement. Reliable enough to train against, and consistent from session to session on the same machine. |
| Estimated from a model | Calories, “fat burn” figures, distance on a cross trainer | A generic formula applied to your session. Useful as a relative measure of your own effort over time. Not a measurement of you. |
Calories: the most trusted and least reliable figure
Calorie displays are estimates produced by applying a standard metabolic formula to the work the machine thinks you are doing. The formula does not know your body composition, your movement efficiency, your fitness level or in many cases even your weight, unless you entered it.
Two people of identical weight doing the identical session will genuinely expend different amounts of energy, and the console will show them the same number. Worse, the same person on two different machine types will see very different figures for equivalent effort, because the underlying models differ.
The sensible use is comparative and personal: same machine, same settings, is today more or less work than last week. Comparing a calorie figure against food intake, or against a different machine, is comparing an estimate to an unrelated estimate.
Heart rate: where the sensor type decides everything
- Hand-grip sensors are the least reliable option in common use. They require sustained, still, even contact, which is exactly what running and rowing prevent. Readings lag, jump, and frequently latch onto your cadence rather than your pulse.
- Optical wrist sensors are considerably better, and are at their weakest during rapid changes in intensity and during activities with heavy wrist movement or grip.
- Chest straps read the heart’s electrical signal directly and are the reference standard for consumer equipment. If heart rate matters to your training, this is the upgrade that actually changes the data.
Check whether a machine can receive an external strap over Bluetooth or ANT+. Many can, and doing so replaces the weakest figure on the console with the strongest, usually for a modest cost.
Distance, and what it means on each machine
- Treadmill: genuine. Derived from belt speed and time.
- Exercise bike: a conversion from flywheel revolutions using an assumed wheel size. Internally consistent, but not comparable to distance on a road.
- Rower: calculated from the work done against the resistance. Consistent within a machine type and reasonably comparable between machines of the same design.
- Cross trainer: the weakest of the four. Stride count multiplied by an assumed stride length that may bear no relation to yours.
Where accuracy classes come in
ISO 20957 defines accuracy classes for displayed values — A, B and C — with different permitted tolerances, Class A being the tightest. Most domestic equipment is not certified to Class A, and many listings do not state a class at all. Where a class is quoted, it is one of the few genuinely comparable statements about console accuracy you will find.
How to get useful data out of an imperfect console
- Pick one machine and one metric and track it consistently. Internal consistency is where the value is.
- Prefer measured figures over estimated ones. Pace, resistance level, stroke rate and time are more useful training targets than calories.
- Add a chest strap if you train by heart rate.
- Enter your weight accurately where the machine asks. It will not make the calorie estimate correct, but it will make it less wrong.
- Do not compare across machine types. A calorie on a rower and a calorie on a cross trainer are different estimates from different models.
None of this means consoles are useless. It means they are instruments with known limits, and training against the figures they measure well is more productive than chasing the ones they guess at.
Connectivity: the specification that outlives the console
Consoles date faster than the machines they are attached to. What determines whether a machine stays useful is whether it can talk to something else.
- Bluetooth and ANT+ are the two common wireless standards. ANT+ is well established for heart rate and sensors; Bluetooth is more universal for phones and tablets.
- FTMS (the Fitness Machine Service profile) is the standard that lets a machine report speed, resistance, power and cadence to third-party apps in a common format, and in some cases lets an app control the resistance. A machine supporting FTMS is far less dependent on its manufacturer’s own software continuing to exist.
- A plain heart rate receiver is worth noting on older equipment; it is dated but it works.
If a machine only reports to its own manufacturer’s app, with no open profile, then the usefulness of its data depends on that company continuing to support that app. That is a real risk over the life of a piece of equipment, and it is checkable before you buy.
Data you can actually keep
Ask two questions of any connected machine: can the session data be exported in a standard format, and does it sync to a platform you would use anyway. A machine whose data can be exported is one you can leave behind without losing your training history. A machine whose data is locked to a discontinued app has, in effect, deleted it for you.
Related reading
- Start here: Reading Fitness Equipment Specifications Without Being Misled
- Treadmill Deck Cushioning and Belt Specifications
- Treadmill Motor Ratings: Continuous Horsepower Against Peak
- Resistance Types Compared: Magnetic, Friction, Air and Water
- Warranty Claims on Fitness Equipment
- Recalls and Safety Notices on Fitness Equipment
- Browse all equipment categories
- Not sure where to start? Try the equipment recommendation tool
- Heart Rate Monitoring: Chest Straps Against Optical Sensors
How we compare
Compare Fitness Equipment does not physically test equipment. Our comparisons are built from published manufacturer specifications, the standards those specifications are measured against, and the trade-offs that follow from them. We say which figures are set by an agreed standard and which are defined by the manufacturer, because the difference changes how much weight a figure deserves. Specifications, prices and stock change without notice, so check the current figures on the retailer’s own page before you buy. Where we earn a commission from a retailer link we say so on the page it appears.