Systems for repair of soft tissue to bone, without knot tying. The soft tissue repair systems include self-cinching constructs with splices (55), loops (50) and inserts (10) that are preloaded onto knotless anchors to position the self-locking, adjustable construct at the repair site. The splice incorporates an insert in the form of a flexible strand with at least one barb (11), or simply in the form of a cut length of suture or braid that is inserted into the center of the cinching loop to create a thicker portion. When the cinching loop is tightened, the insert prevents loosening of the loop, locking in the cinching loop and preventing movement of the loop.
