Despite an intention to exercise, it remains a challenge for many people to establish a workout routine over a period of time. Amongst identified barriers and enablers to exercise, getting dressed for a workout is considered as one of the tipping points of actually going. Implementing the Aesthetic of Friction in this specific context, could imply the right course of action for the user, while it also allows freedom and encourages meaning-making. In this Research-through-Design project, we designed an interactive shrinking hanger, that implements these key principles, to encourage exercise motivation. We followed an iterative process focusing on the aesthetics of the interaction to find out how a careful consideration of the look and feel of an interactive artefact influences the acceptance of the implemented friction. We document the design process of this aesthetics of friction exemplar, and reflect on how to implement friction in design.

The increased popularity of recreational sports, like running, led to the development of numerous technologies supporting people in their training. However, in their current form and interaction, these take a rather standardized approach focusing on quantified data tracking displayed through screens or audio. In this paper, we explore how dynamic data physicalization through a shape-changing interface can open the design space of exercise feedback. Relying on an expert study on the aesthetics of interaction (N=23), we designed Laina, a shape-changing art piece presenting physicalized running data through a slow feedback mechanism. We deployed Laina at 3 participant's home, during a series of 3-weeks field studies. Results show that Laina allows for deep reflection, anticipation and exploration of running behavior. The aim of our paper is to provide insights on the use of slow feedback mechanisms for exercise-related products, through the design of a dynamic data physicalization artefact.