62 male adult patients undergoing ACL reconstruction (ACLR) were randomized to either bone-patella tendon-bone (BPTB) graft, single-bundle hamstring (HT-SB) graft, or double-bundle hamstring (HT-DB) graft techniques. Changes in bone mineral density (BMD) of the three different ACLR techniques were measured at 1 day, 3 months, 5 months, and 1 year post-operation. Similar results were seen in the three ACLR techniques in terms of bone loss at the knee region, irreversible bone loss at the hip, and early clinical and functional outcomes up to 1 year after surgery. Additionally, a positive correlation existed between BMD at the distal femur and single-leg hop distance a 1 year post-operation.