Effect of a Prescribed Starting Position on the Range of Distribution of Forward Reach Distances in the Functional Reach Test

Abstract

To investigate the effect of controlled starting position condition on the forward reaching distance during Functional Reach Test (FRT). [Participants and Methods] Sixteen healthy males participated in this study. The range of distribution of the right acromion, greater trochanter, center of pressure, and forward reaching distance were analyzed in the controlled starting condition and uncontrolled starting condition during FRT. [Results] The range of distribution of the right acromion position, greater trochanter position, center of pressure, and forward reaching distance were significantly smaller in the controlled starting condition than in the uncontrolled condition.[Conclusion] The range of distribution of the starting position and the forward reaching distance were smaller during controlled starting condition than the uncontrolled condition of the FRT.

Effect of controlled start position on the reach distance distribution range in the functional reach test among community-dwelling older adults

“…In both conditions, the right acromial process distribution range (ADR), great trochanter distribution range (GTDR), COP position distribution range (COPDR) in the start position, and RDDR were defined as the differences between the most anterior and posterior positions in the individual’s three trials 16 , 17 ) .…”

“…Consequently, results have been inconsistent regarding the relationship between reach distance and SBA in older adults. One reason for the lack of consistent results may be that the start position in the FRT is typically not well controlled 15 , 16 , 17 ) . Duncan et al 18 ) reported that only the foot position was controlled as the start position in the FRT.…”

“…In the FRT of young adults, it has been reported that the reach distance distribution range (RDDR) was reduced when the controlled area other than the foot was used as the start position 16 , 17 ) . Therefore, even in the FRTs of older adults, controlling a position other than the foot as the start position may minimize the increase in COG sway associated with a thoracic kyphosis posture.…”

Effect of a controlled starting position on the relationship between the forward reach distance and movement distance of the center of pressure in the functional reach test using the ankle joint strategy

“…These results suggest that a CSSP is an important factor for accurately calculating the FoRD in an FRT. Conversely, it has been reported that there is no correlation between the FoRD and the anteroposterior MDCOP in the forward reach with the hip joint strategy adopted by Duncan et al 1 ) , regardless of whether the starting standing position was controlled 7 ) . The MDCOP is one of the indicators of the limits of stability in the standing position 8 ) and has been reported to be related to the SBA 3 ) .…”

“…Nishimura et al. 7 ) reported that the distribution range of the FoRD (DRFoRD) was reduced by a CSSP in the FRT. These results suggest that a CSSP is an important factor for accurately calculating the FoRD in an FRT.…”