Exoskeletons can be a big help, but they are primarily developed to fit a...
Exoskeletons can be a big help, but they are primarily developed to fit a western person of average height and weight. That means the technology is far from suitable for everyone. NTNU researcher urges change to accommodate more users.
Source: Parker Hannifin Corporation, USA

Robotics for everyone or only for the average person?

Robot technology is being used more and more in health rehabilitation and in working life. Exoskeletons are one technology with great potential. But this technology is often developed for the average person. So what about people who are small and thin, or tall and overweight?

The Norwegian competitive athlete Birgit Skarstein is known in Norway for her participation in an expedition for the Lars Monsen TV series “Uten Grenser” (a remake of BBC’s Beyond Boundaries). She is paralyzed from the waist down as the result of an accident. But a few years ago she walked onto the stage at the annual Sports Gala in Hamar.

An exoskeleton – an advanced robot technology – enabled this feat. Exoskeletons are a type of outer framework, a wearable robotic device, that are used both in rehabilitation and to facilitate work tasks for people who need to do heavy lifting. In rehabilitation, an exoskeleton can be used to help the user rebuild their body after an illness or accident, such as a spinal cord injury.

In work situations, exoskeletons are used as a supportive technology to make the job simpler or easier and to promote safer and more correct movement to prevent injuries and accidents. In other words, it’s a useful, smart technology. But as of today, this technology is primarily adapted for a western adult human being of average height and weight – and thus far from suitable for everyone.

Clear goal for the research

The average exoskeleton can accommodate a maximum height of 190 cm and a weight limit of 100 kg. These parametres exclude many people from using this technology, whether for rehabilitation or to perform work tasks.

Norway has one of the world’s tallest populations (approx. 180 cm for men, 168 cm for women). Indonesia has the shortest population in the world, with an average height of 157 cm. In countries like Bangladesh and Madagascar, women’s average weight is 49 kg, while in the United States there are areas and states with many very overweight individuals. In Mississippi, for example, 40 per cent of the population is overweight. “Technology is often developed for the average adult male, and being overweight is particularly challenging,” says Roger A. Søraa. He studies robot technology and users at the Department of Interdisciplinary Studies of Culture and the Department of Neuromedicine and Movement Science at NTNU.

Søraa has a clear goal for robot technology research: “We want to get exoskeleton designers to think more inclusively and develop robot technology that works for more people. This is a glimpse into a future that we want to make inclusive. That includes adapting health technology that can contribute to a better life for the user to be more widely accessible,” he said

Together with researcher Eduard Fosch-Villaronga at Leiden University in the Netherlands, Søraa recently published the article Paladyn, Journal of Behavioral Robotics.

Not fair to end users

Søraa and Villaronga have investigated three of the largest exoskeleton manufacturers and looked at their user criteria: the US-based Ekso Bionics and Indego, and Cyberdyne from Japan. The researchers point out in the study that robot technology was historically regarded as part of a male sphere, and the criteria used to develop new technology reflect the biases that existed at the time. But these criteria shouldn’t still be used today. “Exoskeleton users come in many different shapes, sizes and genders. However, designers tend to resort to the one-size-fits-all principle. From an investment point of view, this may be cost effective, but it does not do justice to end users who risk being excluded from accessing the technology,” the researchers said.

Making the technology accessible

To make this technology accessible to all, the researchers are proposing some tools for designers and manufacturers to help them become more inclusive.

  • Make sure that exoskeletons can support both overweight and underweight people.
  • Be aware of the physical differences between men and women.
  • Make the exoskeleton as easy as possible to put on, even for users who lack upper body strength.
  • Create buttons in different patterns so that colour blind people can easily operate them without fear of pressing the wrong button.
  • Create buttons with different textures for the blind, and add auditory response sensors.
  • Involve a diverse group of employees and users at all levels in the development – think of the end user.
  • Think about the importance of including typically marginalized segments of society such as LGBTQ (different sexual orientations). Not everyone has grandchildren who can “teach them how to use digital technology.”

Søraa has had research stays in both Japan and South Korea, and robotic technology is far more widespread there than here. “In Japan you see robots being used more often, including at airports for carrying luggage and in the shipping industry where there’s a lot of unloading and loading of goods. This type of robot technology is getting more and more common, so it’s important for it to be adapted to different users,” he says.

We will probably see more exoskeletons in the future, both in the health and labour sectors. But it’s important that as many people as possible be able to use them.

Subscribe to our newsletter

Related articles

Multiple sclerosis: Exoskeleton therapy improves mobility

Multiple sclerosis: Exoskeleton therapy improves mobility

Experts at Kessler Foundation led the first pilot randomized controlled trial of robotic-exoskeleton assisted exercise rehabilitation effects on mobility, cognition, and brain connectivity in people with substantial MS-related disability.

FDA authorized brain-computer interface for stroke rehab

FDA authorized brain-computer interface for stroke rehab

Neurolutions IpsiHand exoskeleton uniquely leverages brain-computer interface technology for chronic stroke rehabilitation

Exoskeleton training expands options for stroke rehab

Exoskeleton training expands options for stroke rehab

Researchers have demonstrated that high-dose therapy gait training using robotic exoskeletons may aid early rehabilitation for acute stroke.

Exoskeleton and brain-machine interface boost stroke rehab

Exoskeleton and brain-machine interface boost stroke rehab

Researchers have developed a system that combines a brain-computer interface and a robotic arm that responds to the actual intentions of treated patients.

Ultra-thin sensitive strain sensors

Ultra-thin sensitive strain sensors

Researchers have developed a new range of nanomaterial strain sensors that are 10 times more sensitive when measuring minute movements, compared to existing technology.

Brain injury: Exoskeleton training improves walking

Brain injury: Exoskeleton training improves walking

Researchers have shown that gait training using robotic exoskeletons improved motor function in adolescents and young adults with acquired brain injury.

Handheld exoskeleton improves hand mobility problems

Handheld exoskeleton improves hand mobility problems

Researchers have developed a robotic exoskeleton that improves the lives of people with limited or no ability to move due to neurological and/or physiological disorders.

Exosuit makes stroke survivors walk farther

Exosuit makes stroke survivors walk farther

Research study in stroke survivors with chronic hemiparesis shows soft exosuit technology to bring immediate improvements in walking speed and endurance tests.

Robot-powered outfit is being fashioned to help seniors walk

Robot-powered outfit is being fashioned to help seniors walk

A new line of wearable robotics - a lightweight version of the armor that comic hero Iron Man wears - could keep seniors on their feet longer.

Popular articles

Subscribe to Newsletter