TY - JOUR T1 - Self-reported measures of training exposure: can we trust them, and how do we select them? JF - British Journal of Sports Medicine JO - Br J Sports Med SP - 891 LP - 892 DO - 10.1136/bjsports-2021-104498 VL - 55 IS - 16 AU - Myles Calder Murphy AU - Philip Glasgow AU - Andrea Britt Mosler Y1 - 2021/08/01 UR - http://bjsm.bmj.com/content/55/16/891.abstract N2 - Valid methods of quantifying sporting exposure and athlete response are essential to answering many sports injury research questions. External measures of exposure describe volume, duration or intensity of a match or training session and include time (eg, hours spent training), distance (eg, metres run) and number of events (eg, number of baseball pitches).1 Internal measures relate to the effect on, or experience of, an athlete during a session and include both subjective (eg, rating of percieved exertion (RPE)) and objective measures (eg, heart rate).1 Accurately recording exposure allows the direct comparison of injury incidence rates between different populations, sports, seasons and anatomical region, and should be accounted for in risk factor analyses.1 In addition to inconsistent terminology used to define injury and performance, the validity of any such analysis is dependent on the accuracy of the exposure data collected. Given the multifactorial nature of injury risk, a range of measures that reflect the physiological, psychological and biomechanical exposure load should be considered rather than focusing on a single metric.It is easy to fall into the trap of quantifying exposure metrics which are easily measured. Substantial … ER -