The aim is to develop the PACE-model and related product from a lab-based to a field context and to evaluate the feasibility of a spin-off delivering realtime training and performance insights to a variety of target groups. The PACE-model integrates data (e.g., power output, heart rate) registered during sports training (e.g.,cycling) and matches these data to individual exercise capacity quantified by the Critical Power Concept (Critical Power/W’). Using the PACE-model, individuals performing exercise (patients, recreational and elite athletes) obtain realtime insight into their energetic reserve capacity. Therefore, the potential applicabilites of the PACE-model are broad: 1) to quantify the level of exertion, allowing immediate (tactical) decisions with regard to the pacing strategy 2) to provide a pacing plan for endurance events to increase the success rate of reaching the finish line 3) to design more individualized training sessions, leading to more health and performance gains As such, the PACE-model can be integrated or developed into a more mature training tool that strongly enhances the experience and efficiency of exercising, training and performing.