<prompt> Yakha inguqulo eyinkimbinkimbi yalesi sigwebo Ubuhlungu bomhlane obuphansi bubangela u-40 wezinsuku ezilahlekile zomsebenzi e-United States.  <response>: Yiqiniso, inguqulo eyinkimbinkimbi yalesi sigwebo ithi: I-low back pain ibangela amaphesenti angu-40 ezinsuku ezilahlekile emsebenzini e-United States, futhi iyimbangela eyinhloko yokukhubazeka emhlabeni wonke. 