Computer Vision and fitness: when training becomes hi-tech

New ways to innovate how people do fitness: the training becomes high-tech thanks to the Computer Vision.

Here’s how new technologies revolutionize entire sectors.

Fitness and technology: perfect combination

The fitness sector has experienced a strong growth in recent years with a good portion of the population who would never give up their weekly training sessions. The development of this market has been accompanied by an increase of the services offered by gyms and sport associations, with systems to plan and manage increasingly tech sport activities built around users.

The boom in wearable devices has certainly boosted training plans, or in any case physical activity, conceived around the needs of each person and favoring their follow-up by trainers and coaches.

The combination of fitness and technology was already a phenomenon being consolidated which, due to Covid-19, has undergone further growth. In fact, many gyms and associations have promoted online courses, in live streaming or through video recordings, supported by tools typically used for videoconferencing.

But is it possible to monitor from remote the correct executions of the exercises? In which way and how precisely? And above all, are people willing to be guided by a software?

 

Investigate technological and market opportunities

The industry proves to be growing and embracing new technologies, but how can we find new ways to innovate the way people do physical activity? We asked ourselves some questions relating to those who are arbiters of the success or otherwise of a product innovation: the final users.

  1. Is a user that trains from home interested in receiving live feedback from an artificial intelligence during the training session?
  2. Is it realistic to think that people would do training sessions taken by a video camera (smartphone or webcam)?
  3. What’s the best way to give a feedback to the user on their posture during training?

Reliable answers had to be found in order to start designing a really useful and accepted technological solution.

In parallel, we conducted a market research aon the solutions currently in use, highlighting their strengths and weaknesses.

Questions of the fitness research

During the lockdown, Youtube, DownDog, Nike Training, Fitplan, Keep, Adidas Training Runtastic, Freeletics, Fixfit and Instagram became the reference platforms for training at home. In particular, Cyberobics has undergone a considerable increase in users during the lockdown.

In January 2020, Cyberobics was little known, but in the 2-3 months of lockdown it became one among the ten most downloaded fitness apps in the world. It has been downloaded by 2 million people in the world and used daily by 300.000 people.

This phenomenon convinced us that the market niche is large enough to carry out experiments and that any technological solution should be multi-platform, i.e. it should integrate with all the tools listed above.

 

The prototype arrives to validate our hypotheses

We designed and built a prototype that allowed personal trainers to give feedback to the user while performing their favorite workouts: the positive ones on the left (to reward the correct execution) and the corrective ones on the right (to indicate the part of the body to be corrected). Both are accompanied by a sound to catch the user’s attention.

Image with a girl training and the graphic interface of the workout

The first tests highlighted the appreciation of the gamification dynamics, therefore added at the top left. These dynamics have proven to be anything but marginal: to date, there isn’t a solution that detects and quantifies the improvements in the user’s motor skills in performing certain exercises during the execution of specific exercises.

 

The planning is done in 5

To design the most suitable digital tool to meet users’ needs, we once again used the principles of Design Thinking. The team carried out a series of activities:

  1. Brief Question: in 5 minutes the team had to write on post-it notes their questions or doubts associated with each brief. Subsequently, questions related to similar issues were grouped together, and then an answer was given by the person who drafted that brief.
  2. How Might We: this exercise allowed us to highlight the challenging aspects of the project and move towards solutions. The team was then asked four main questions, the questions are formulated as follows with “How might we”:
    • How might we understand if the target audience is interested in receiving live feedback from artificial intelligence?
    • How might we get people to train at home?
    • How might we give user feedback on a specific exercise?
    • How might we assess whether the user needs to perform the exercises correctly?

The team had 8 minutes to find answers and then possible solutions for each HMW. The answers were presented verbally by each team member; then the 4 most suitable solutions (one for each HMW) went to a vote.

  1. Sketch: this exercise allowed the team to explore the solution indicated for each HMW, focusing mainly on its content. Each part was given 12 minutes to complete the sketches of the four solutions. At the end, each Sketch was explained, the four most suitable sketches for each HMW went to a vote and the best selected.
  2. User Journey: the team members had 12 minutes to define in 5 steps the interaction between the target user and the selected idea, thus reaching the User goal defined in advance. Each part has made four User Journeys, one for each HMW.
  3. Define the Task: the four most voted user stories (one for each HMW) has been translated into tasks to achieve the goal and assigned to members of the team, sorted by priority of execution. The team is then ready to start with the design and development of the prototype.

Uqido team planning the prototype

The process described above allowed us to create a series of prototypes with which we quickly presented ourselves on the market to collect a feedback.

The results of the test sessions were organized in a summary sheet, which was fundamental for defining user experience based on the analysis of their needs.

The types of feedback that best responded to users’ needs were then identified:

  • Auditory feedback: this allows the user to understand whether the exercise was correct or not. Auditory feedback immediately draws the user’s attention, without requiring particular concentration.
  • Visual feedback – 1: this allows the user to understand the part of the body in question (in need of correction), if the exercise was performed incorrectly.
  • Visual feedback – 2: a score allows the user to monitor the overall progress of the exercise. Specifically, the design team decided to structure a gamification logic to further motivate the user.

Examples of the User Interface

With all these elements, the Design team defined the User Interface (UI) that best met the needs of consumers.

 

From design to technological infrastructure: the choices of the developers

To get a working result in a short time that would allow us to implement the UI proposed by the design team, our developers have decided to develop a simple WebGL application using Unity.

The tool we imagined in our minds looked a lot like a video conference, so we started from this The choice fell on platforms such as Google Meet and Zoom, with a screen shared with the WebGL application. This would enable the user to view the virtual trainer, while an operator or personal trainer receives the feed from his webcam. In addition, Google Meet is cross-platform and, by sharing a Chrome tab, we were able to avoid any technical problems.

The first step has been to show the training film on a full screen, showing icons when the personal trainer deemed it necessary.

The personal trainer would give his feedback from the keyboard, so that the screen was left free. In this step two audio effects were selected, related to positive and negative feedback.

The next step, we had to insert a control that was more user friendly for the personal trainer. To do this we applied some multiplayer techniques to the Unity build:

  • WebGL build: this was shown on the user side. On a full screen the user could follow the training video and see the feedback reported by the personal trainer.
  • Local build: this was used on the personal trainer side. Thanks to a simple User Interface, the personal trainer, could control the progress of the training video and send feedback to the user.

With this prototype, after setting up a call on Google Meet with the user, it was possible to launch the WebGL build and the Local build, share the screen of the first one and, as soon as the user is connected, start the session.

Begininnig screen of Uqido Virtual Trainer

The third phase of construction of a prototype that would be near to a finished product consisted in abandoning Google Meet or Zoom and to create a landing page where the user could see the WebGL build screen.

Therefore, the goal was to upload the WebGL build to a web page, which can behave differently depending on who is using it. The trainer version would act as the actual server, managing all events such as the video start and feedback, while the user’s version would be the client, receiving only the signals needed to reproduce locally what the trainer sees from the server.

A development with more phases with incremental — had led us even more near to a product ready to be launched on the market.

There were only some aspects to solve, related to the frameworks used. In fact, the amount of data sent during the workout session was high and WebGL and Unity’s High-Level Multiplayer API impose limits on the amount of data you can send and receive. Another challenge for our developers!

 

What did we learn? Between market validation and business opportunities

Through the typical techniques of Growth Hacking we conducted a research on the needs of our target audience and the discoveries we made proved to be really interesting. The future development of this digital product is based on this knowledge base.

  1. Is a user who trains from home interested in receiving a live feedback from an artificial intelligence during the training session? Among the people who already use fitness applications and videos: 71% consider the feedback received from the prototype to be a valid or fundamental element, 63% said they were interested in participating in a training session with an artificial intelligence capable of give a feedback, 100% of those who tested our prototype said they would repeat the experience;
  2. Is it realistic to think that people would do training sessions taken by a video camera (smartphone or webcam)? From the observation of the test sessions it emerges that there have been no particular difficulties in the use of these supports, not even in configuring the devices for a correct framing preparatory to the feedback system.
  3. What’s the best way to give a feedback to a user on their posture during training? While 20% of the sample doesn’t feel the need to receive a feedback via voice indication, 79% believe the audio is useful or essential. As for the video feedback, everybody finds it useful or fundamental: 77% said they were satisfied with the video feedback, believed that it positively influenced to the overall experience and managed to correct the movement after receiving it, 100% also have indicated that he would have liked to receive voice feedback explaining in detail the corrections to be made (not present in our prototype, we will therefore consider adding it).
  4. The surprise gamification. The process of design & research process revealed a key competitive advantage of a possible “Virtual Training” solution: the fact of being able to give a score to the execution of an exercise motivates and greatly involves the user. No app currently offers this dynamic to its users, precisely because at this moment they’re unable to evaluate the execution of the movements.

In Italy, during the lockdown, 28% of gyms started offering online courses on different platforms and this new activity generated an increase in the number of costumers up to 91% compared to those acquired in the first phase of the emergency, when many structures where still open. Only in the first month of the emergency, the digital offer of individual or group workout sessions doubled (+101%). These numbers give us the measure of a change taking place, it’s up to us to find ourselves ready.

Business is evolving at rates never seen before and companies are exploring new technologies to cope with change, as in the case of Tecnolaser and SiPrenota.

Uqido team planning the prototype

 

Are you interested in these projects’ insights? We share them with the subscribers to our Exploratorium, find out more about this experimental lab clicking here 👉 https://exploratorium.uqido.com/

WHAT’S EXPLORATORIUM

Exploratorium is Uqido’s laboratory where every week we project, develop and launch on the market a new digital product.

Made of developers, designers and marketing strategists coming from places like IDEO, YCombinator, Sony and M31, our MVP Lab creates and launch every week a new prototype and, with techniques of Growth Hacking, Lean methodologies and Design Sprint, it collects the feedbacks of the market.

 


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