Purpose: In approaching full trunk flexion (75%-80% of full flexion), myoelectric activity oflumbar erector spinae muscles is reduced or silenced; this response is known as flexion-relaxationphenomenon (FRP). FRP is a shift in load sharing and spinal stabilization from active structures(erector spinae muscles) to passive ligamentous and articular structures. Static lumbar flexionunder constant displacement or load, within the physiological range, elicits creep in lumbarviscoelastic tissues. During a short static lumbar flexion, significant changes are elicited in themuscular activity pattern of the FRP. Laxity in the passive tissues of the spine during prolongedspinal flexion disturbs the spinal stability. This study investigated the effects of Kinesio taping(KT) before and after periods of the static lumbar flexion on the timing of FRP for the erectorspinae muscles.Methods: The research was conducted on 22 healthy female college students. The surfaceelectromyographic silence and onset of the erector spinae muscle activities were measured intwo states; before the static lumbar flexion and 10 minutes after the static lumbar flexion in twoconditions (with and without KT).Results: The results indicate that KT causes erector spinae muscles relaxation earlier in theflexion and later reactivated in the extension. In other words, KT increased flexion relaxation timein erector spinae muscles (P<0.05). The results also indicate that 10 minutes static lumbar flexionwill produce relaxation of the erector spinae muscles later during the forward bending activityand earlier reactivation during the extension (P<0.05). Application of KT cannot compensate theeffects of 10 minutes static flexion at the onset and the silence of flexion relaxation and over againcreep causes FRP occurs later.Conclusion: According to the effects of KT before the creep in reducing the duration of themuscles activity, Kinesio tape may be used in reducing muscle spasms and duration of erectorspinae muscles activity. It may also improve FRP in the back and the people who are predisposedto the back pain and FRP has not seen in them. Therefore, the need for research on these subjectsand other factors, such as the electrical activity of muscles is essential. Although the application ofKT cannot substitute the effects of 10 minutes static flexion on the onset and the silence of flexionrelaxation, it could be used for protection and reduction of using strained viscoelastic structures.