The validity and reliability of a novel app for the measurement of change of direction performance

Abstract

and Madruga-Parera, Marc (2019) The validity and reliability of a novel app for the measurement of change of direction performance. Journal of Sports Sciences .

Jump and Change of Direction Speed Asymmetry Using Smartphone Apps: Between-Session Consistency and Associations With Physical Performance

“…Despite the common use of these methods, all have an associated cost which can be too high for practitioners with limited budgets. To combat this, smartphone apps have been recently developed to measure jumping and CODS performance (1,2,21). However, although these apps have shown excellent levels of agreement with laboratory equipment (e.g., force platforms for jumping and timing gates for CODS tasks), no study has determined the between-session consistency for the measurement of interlimb asymmetries and their relationships with surrogate measures of athletic performance.…”

Validity and Reliability of Mobile Applications for Assessing Strength, Power, Velocity, and Change-of-Direction: A Systematic Review

“…Of studies included in the present systematic review, only one tested the validity of a mobile app for measuring change-of-direction performance [55]. It showed that the CODtimer app had a very high correlation (r = 0.998) and a standard error of only 0.03 s regarding the timing gates for measuring change-of-direction total time [55].…”

“…Characteristics of the included studies can be found in Table 3. The apps presented in the included articles were compared with motion a capture system [40,61,68,69], linear encoder and transducers [56,59,60,[62][63][64]71], as well as with contact platforms [37,39,41,57,[61][62][63]66], accelerometers [59,62,63,68,70], and time photocells [55,65,67,70].…”

“…Among the included studies, [39,53,56,59,[62][63][64] tested the bench press, [64,68] the back squat, [60] the half squat and full squat [39,53], [40] the snatch, [53] the hip thrust, [68] the power clean, [37,41,57,61,66,71] the vertical jump (CMJ, SJ or DJ), [58] the running, [65,67] the sprint or agility [55,70] the static and dynamic arm swing.…”

“…Of studies included in the present systematic review, only one tested the validity of a mobile app for measuring change-of-direction performance [55]. It showed that the CODtimer app had a very high correlation (r = 0.998) and a standard error of only 0.03 s regarding the timing gates for measuring change-of-direction total time [55]. Although that study showed the validity of the app, the authors suggested that the app might not be valid for change-of-direction tests that were not used in their study.…”