Gym chains
R-Rider can help ‘slimming’ of carbon footprint

fitness studios and spas

The science of energy conversion has been crucial to the modern world. The fact is that there is lot of energy around us, but to convert it into a required form is what takes more energy. The burgeoning energy requirement and the rising concern for environment have led to many new ideas on reducing the carbon footprint of establishments around the world.

The world of fitness is also experiencing an undercurrent of concern for ‘green energy’. A large portion of the population wants to stay fit and burn extra body fat. In the process an average gym user cycling for 30 minutes burns around 300 calories. His/her stationary equipment also uses some electrical energy.

What if the machine could use the energy expended by the cyclist? How? By converting the energy into usable form for the cycle, which is electrical energy.

Rhymebus of Taiwan has been developing a product called R-Rider, a fitness equipment energy regeneration system, which can be fitted into existing cardio machines like bikes and cross-trainers. Many manufacturers in Taiwan already pre-fit R-Rider into their equipment.

R-Rider is a system for converting the athlete’s kinetic energy into electrical energy and feeding it into a power grid simultaneously, without having the need of a battery to store the energy. R-Rider also has a data transmission system via power line communication (PLC) to share data with the cloud. The more the athlete pedals the more is the power generation.

R-Rider’s design is a combination of a generator and a controller, with a huge energy conversion efficiency of 80%. This trend of harnessing the workout energy has caught on all over the world in recent years.

In Brazil, prison inmates are given a reduction in sentence if they can produce energy by pedaling. The energy so generated is stored in batteries and used to light up streets! In the UK plans are afoot to install “green gyms” in parks, where people can work out and charge their phones or light up the streets. In certain gyms the heat dissipated by cross-trainers is collected back and used in producing electricity. This also reduces the power needed for air-conditioning.

R-Rider is an inbuilt design for bikes, cross-trainers, spinning bikes, steppers and rowing machines. There are no additional installation costs. All it needs is a power outlet to supply the power back to the grid.

Generator/ Motor
Model MA2-250 MA2-500
Voltage 220 V 220 V
Rated power 250 W 500 W
Peak power 500 W 100 W
Alternator frequency Developing >90%

An average gym user pedaling for 30 minutes can light up a 20-Watt bulb for 5 hours, run a 100-Watt TV set for an hour, or charge a 200-Watt laptop for 30 minutes. With the data communication module users can share their health data and compete with people all over the world while managing their work outs. The module could also be an interactive media for marketing and advertising.


Model C2-250 C2-500
Output current 1.25 Amp 2.5 Amp
Peak current 2.5 Amp 5 Amp
Power source 1-Ph AC 220V
Voltage change 220V, 47-63Hz
DC power output 12V 2A
Controller efficiency 90%
Data transmission PLC

The R-Rider is a comparable, or even better, suitor for incentives provided for solar energy installations. Gyms and clubs could attract new users through the novel idea of “green energy”, reduce their carbon footprints, and bigger establishments could even trade in carbon credits!

Taiwan based Rhymebus Corporation
is a leading manufacturer of AC inverters, auxiliary control equipment, and automation control system integrator.


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