Run 3D FAQs
What is the difference between a 2D Running Gait Assessment and the Run 3D Gait
There are a few key differences between 2D and 3D. Here are the main ones.
1.) How the information is collected
A 2D gait analysis is either done by eye, or using a ‘normal’ camera (such as an iphone) to capture a video, looking at a runner from the side and from behind.
A 3D analysis uses infrared cameras, similar to the ones that are used to create animations in movies (think Gollum in Lord of the Rings) and data points to collect information of movement of joint centres.
2.) Movements measured
2D can only pick up sagittal plane movements (side on) and frontal plane movements ( from the front and back). Sagittal movements are flexion and extension, and frontal plane include abduction and adduction.
3D gait analysis picks up all three planes of movement including transverse movements, better known as rotation. The transverse plane is picked up as if there was a camera above your head looking down. This plane is very important when it comes to injuries as it is associated with the loading phases of running, which is where we mostly develop overuse injuries. This is one of the main differences between 2D and 3D is that we can pick up transverse plane movements easier.
3.) Objective vs. Subjective
2D gait analysis relies on the experience of the clinician to identify abnormalities. Whilst it is very important in gait analysis to still use 2D for picking up larger movements and a general picture of how someone is running, it is much harder to see combination movements (such as pronation) and finer movements, like rotations.
Run3D actually calculates data points which allows much greater accuracy of information being collected. Our physios at the Drummond Clinic are trained to pick up information by eye, but then we can also delve into the finer details with our Run3D gait system in order to give you a much more detail report.
How many monitor points are placed on the body?
Our Run3D system uses two different types of marker placements. We have what we call our rigid clusters, and then our anatomical markers. You will have straps wrapped around your calves, thighs, and pelvis. On the backs of these straps we need will place the ridgid clusters (5 of them). We then will stick 8 individual markers on either sides of your ankles, knees, and the front of your hips. Our physios are specially trained to identify these bony landmarks so that these markers can pick up your joint lines, and therefore your joint centres!
You will also have markers on your shoes to help us identify foot and ankle movements.
Do we keep a copy of your video assessment?
Yes, we collect a 2D video which you are entitled to have as well as your report. You don’t get a copy of the skeleton video as that is just a graphic that appears in real-time.
How many people have used this method before?
3D gait analysis is the gold standard in gait analysis across the world, so a lot! It is what is use in research facilities and universities for gait analysis, and now we have brought it to you! Run3D currently has 7 locations in the UK (and growing), 2 in Ireland, and 1 in Amsterdam. The research and development are ongoing to maintain the highest standard possible and is cutting edge in gait technology.
What are movement asymmetries?
The definition of an asymmetry is lack of equality. When we refer to movement asymmetries, we are looking at differences between your right and left side movements. We don’t expect everyone to be perfect, but a large difference between movement on your right and movement on your left would give us further reasoning to look into WHY and if that is having any contribution to your injury or movement patterns.
What are performance indicators?
These are things like, cadence (how many steps you’re taking per minute), vertical excursion (how much you move upwards, or bounce), how long your foot is on the ground for, step width, etc. These indicators aren’t necessary the cause of an injury (although are usually contributing or signs of!), but they can help us with performance. For example, if you were a really bouncy runner, and had a high vertical excursion, a long distance runner would waste a lot of time going upwards, instead of forwards. Whereas, a sprinter might have a higher vertical excursion as they are trying to get a higher amount of power over a shorter period of time.
Will I get recommendations at the end of my analysis?
Yes, alongside your very detailed report, you will receive suggestions and recommendations by your physio in a report sent to you with the next steps in terms of follow up. We like to think of a 3D gait analysis like an MRI for your running. We understand that there is a lot of information to take in, and so we will work with you to make sure it is useful for you afterwards to improve your running or recover from an injury.
What is the difference between Silver and Gold?
Basically, the Run3D Silver Package is our 3D gait analysis. This includes a history of your injury, 3D motion capture of you walking or running on a treadmill, a detailed report, and recommendations based on your results.
The Run3D Gold package includes an objective musculoskeltal assessment of your strength, flexibility, structure, and functional abilities, in addition to the 3D gait analysis. The objective tests are carried out using tools that measure force (dynamometer), angles (inclinometer), functional grading scores, and pressure (sphygamometer) measurments. Click here for the details for each package.
Will I receive treatment during my Run 3D session?
No, the Run3D service is all about testing and gaining data from those tests in order to make recommendations for follow up. Our expert clinicians will give you advise on the best course of treatment after they have seen the results of your assessment.