**2. Related Work**

Injuries stemming from long-distance running are studied extensively in the literature. In addition, there are many commercial products available in the market that aim to assist runners to avoid injuries and to provide motivational support to lead a healthier lifestyle. These commercial products include variety of smartphone apps, often paired with wearables or insoles, that measure fitness markers such as energy expenditure, speed, distance, heart rate, and cadence (see the review of related fitness trackers in [12] and apps in [11,13,14]).

In this section, we focus on reviewing scientific literature on (i) studies that utilize remote monitoring systems for runners, (ii) studies that link running cadence to running-related injuries and (iii) studies that explore the usability and feasibility of mHealth systems in the context of running.
