Dynamic balance measurements: Reliability of smartphone attachment sites

Dynamic balance devices are costly and uncommon, requiring dedicated space for use. Thus, studies often utilize smartphones to measure dynamic balance by attaching them to body parts, as they are inexpensive, small, and readily available. However, little consideration has been given to determine which body part would yield the most reliable measurements. ː A total of 25 healthy college students consented to stand on a balance pad on their dominant leg for 30 s. The test and retests were performed at a one-week interval. ː Agreement between the test and retest values was moderate for those obtained from the sternum and waist (0.50 ≤ ICC ≤ 0.74) and was good for those obtained from the shin (0.75 ≤ ICC ≤ 0.89). There were significant moderate positive correlations between the test and retest results for all the attachment sites (0.40