“…Indeed, feedback can express either knowledge of performance, when it refers to the quality of movements, or knowledge of results, when it refers to the goal/level achieved [85]. We identified 37 papers that present wearables providing concurrent feedback, eight papers presenting wearables giving terminal feedback [23], [24], [33], [39], [59], [68], [71], [77], and six papers that discuss wearable systems providing both (mixed feedback) [63], [66], [72]- [74], [78]. Six papers do not directly address the topic of feedback [45], [57], [64], [69], [70], [75], [76].…”