How do you change your form after years of ingrained habits? What does it feel like? How long will it take? What impact will it have on your performance? NewBalance.com readers have asked all these questions – and, frankly, we had a few of the same questions ourselves.
To find out more about the transition, we put Josh and Erin through the paces with Good Form Running's Grant Robison, evaluating their progress and listening to their experience to get both qualitative and quantitative feedback on just what it takes to attain Good Form.
Grant Robison
Good Form Running Expert
Josh Cordeira
Road/Trail Runner & Marathoner
Erin Ballard
Competitive Sprinter & Middle Distance Runner
Last fall, over the course of eight weeks, Good Form Running evangelist Grant Robison worked with two established runners to document their individual transitions in an effort to shed some light on what others might experience when setting out to improve their running form. Diligently, our transitioning runners, Josh and Erin have tracked their runs, recorded their vitals, and logged their bodies' response as they make the change from their lifelong form to Good Form.
A competitive college runner with an impressive 4:33 mile to his credit, Josh, 27, has completed multiple Boston Marathons and runs now primarily to blow off steam while completing his PhD in neuroscience. Erin, 26, a competitive sprinter in high school and college, balances ongoing training and competition with a career as a chemical engineer. Erin has battled plantar fasciitis for some time now, dramatically impacting the time she is able to spend on the track.
Watch: Getting Started with Good Form Running
Grant evaluates the Josh and Erin's initial form, and introduces them to the elements that will help them improve their form.
Josh's Mileage: 
Training | Weekly distance covered.
For eight weeks, following the completion of each day of training, Erin and Josh logged their runs online, reporting on their distance, speed, physical condition and awareness of each element. This data was used not only to map their progress, but also to serve as a means for Grant to evaluate their progress and mindsets over the course of the transition.
The data also paints a picture of two very different runners: in this case Josh's consistent, shorter runs in contrast with Erin's high-mileage in-season training routine.
Josh: 
Steps Per Minute | While Erin began significantly closer to the ideal 180 strides per minute, both she and Josh made significant progress over the course of the transition, each improving by a margin in excess of 10 strides per minute.
Ankle Lean | Ankle angle is a good indicator of the extent to which a runner is deploying the lean element of Good Form Running. Josh and Erin each showed significant improvement here – Erin most-significantly in the first weeks of the transition, and Josh more gradually.
Pelvic Tilt | The tilt of the pelvis correlates strongly with the adoption of the Posture element, with a low angle of tilt indicating a more ideal posture. Both Josh and Erin demonstrated consistent reduction in tilt over the course of their transitions.
As part of Josh and Erin's transition to Good Form Running, we booked time for each of them at The New Balance Sports Research Lab in Lawrence, Massachusetts, with an eye towards evaluating measurable quantitative changes in their form. Trampas TenBroek and Pedro Rodrigues put Josh and Erin through a series of tests at the outset, midway point and conclusion of the transition period, designed to measure physiological changes that the runners themselves would have difficulty assessing.
The bulk of the data showed that not only did Josh and Erin each demonstrate significant, measurable changes in their form — improved posture, higher cadence, measurable lean — but that these changes were generally consistent throughout the course of the transition toward Good Form. In short, the conscious changes made to their form were measurably proving out in the lab.
Four weeks into their transition, Erin and Josh met again with Grant to assess their progress and discuss the elements that continue to present the greatest challenges to each of them. Josh, a life-long heel striker, shares that he has had a particularly challenging time adopting a midfoot strike – although a review of his running form demonstrates that he's made significant progress in that area, and has the feeling in his calves to prove it.
Erin is having mixed success – improvements in her posture and an emphasis on midfoot striking have resulted in some of her longest pain free runs, although she's struggling with the lean and cadence, and has some concerns about the ways in which these changes may impact her in-season performance.
To further aid their progress, we also transitioned Josh and Erin to the men's and women's 101's – a lower-profile shoe designed to encourage a midfoot strike.
Watch: Analysis and Adjustments
In this second session, Josh and Erin meet again with Grant to evaluate the progress that each has made towards better running form, and pick up some tips and techniques.
(5) HardDegree of Difficulty | Most difficult and easiest elements.
Degree of Difficulty | Most difficult and easiest elements.
Following each of their workouts, Josh and Erin rated the easiest and most difficult of the four Good Form Elements as related to that day's run. The data give us good insights into what the transition might look and feel like. Consistently, posture was the easiest element for each runner, and achieving a midfoot strike the most difficult. Erin reported early difficulties with the higher cadence, although the data collected at the New Balance Sports Research Lab (see above) suggests that she may not have been struggling as much as she thought she had.
Watch: Good Form for Life
Grant makes a final evaluation of Josh and Erin's progress, and gives each of the runners some instruction for incorporating Good Form Running into their life-long training routines.
For their third – and final – clinic, Josh and Erin once again met with Grant to review the progress made over the preceding eight weeks. Erin admits to having really struggled at several points, until she shortened her stride to accommodate the higher cadence, at which point Good Form really began to click for her. Josh's transition has been, if somewhat easier than Erin's, every bit as significant – particularly his adoption of the midfoot strike. Grant reinforces that the transition to Good Form can really only be begun over an 8-week period, and gives Josh and Erin additional guidance on continuing (and self-evaluting) their ongoing transitions toward better running form.
100%Soreness is a natural part of the transition to new running form, as new muscle groups are used. The chart below shows the areas in which Josh reported feeling sore over the course of his eight week transition.
Soreness is a natural part of the transition to new running form, as new muscle groups are used. The chart below shows the areas in which Erin reported feeling sore over the course of her eight week transition.
Body Wellness Assessment
Following each run, Josh and Erin recorded self-assessments of the pain felt in their calves, achilles, glutes, hamstrings, lower back and quads. This data was compiled to track the pain encountered as each adopted the principles of Good Form Running.
Erin reported recurring pain in her calves, glutes, hamstrings and quads – although, in almost every case, the pain she reported dropped off significantly by the 4th week of the transition.
Josh's transition was relatively pain-free, although he reported recurring pain in his calves in both the first two and last two weeks of the program. The last two weeks, in particular, coincided with his reported difficulty with incorporating a midfoot strike (see Degree of Difficulty, above).
We were astonished by the progress that Josh and Erin were each able to make over an eight-week period – not only improving their form, but also running in significantly-less pain. Erin, in particular, noted a significant improvement in her performance.
We were also pleased to find that the impact of a transition towards Good Form Running was measurable and significant, as supported by the findings of the New Balance Sports Research Lab.
What remains to be seen is the extent to which Josh and Erin's transitions are not yet complete. Grant and other advocates of Good Form Running are adamant that such a transition – particularly for experienced runners – can take as long as a year, as old habits are unlearned and new ones are adopted and ingrained.
Have you tried adopting a new approach to your running form? Ever been through a Good Form Running clinic and struggled or wildly succeeded in adhering to its principles? Share your experiences with us below, and with others working to make a move towards a better way to run.

