A kind of isometric muscle force testing jig improvement mechanism,With a bottom frame,The left and right sides middle top surface of bottom frame put in patch is respectively connected in uprightly one of up left column and a right column,There is the number location hole of one of symmetrical contour file setting row's perforation column two sides on each left column of what and right column respectively,And have symmetrically one of contour left sliding sleeve and a right sliding sleeve on each left column of what and right column respectively,Each sliding sleeve point connects a bolt by a rope,Each bolt is left across each side,The location hole of right column,It is connected to a cross bar between more two sliding sleeve of what,There is the hold set of a pair of spaced on cross bar,Overlap joint is placed with a bottom plate between Hou two sides before bottom frame,It can be placed with a sliding-proof pad on what bottom plate,Dynamometer is placed on sliding-proof pad,Just can allow manpower hold set station what dynamometer thereon,Obtain test result.一種等長肌力測試架改良機構，具有一底框，在貼地放之底框之左右兩側中間處頂面各接有呈直立往上之一左柱與一右柱，於各左柱與右柱上分別有對稱等高縱列設置之一排貫通柱兩側之數定位孔，且於各左柱與右柱上分別有對稱等高之一左滑動套與一右滑動套，各滑動套分藉一索連接一插銷，將各插銷穿過各側左、右柱之定位孔，更於兩滑動套間接有一橫桿，橫桿上有一對相間隔之握套，在底框前後兩側間搭接放有一底板，能於底板上放有一止滑墊，止滑墊上放有測力器，便能讓人手握握套站於測力器其上，得到測試結果。
