Int J Sports Phys Ther. Whiteley R. Blood flow restriction training in rehabilitation: a useful adjunct or Lucys latest trick? It is important to optimise the functional recovery process to enhance patient outcomes after major injury such as anterior cruciate ligament reconstruction (ACLR). 2018;46(14):335360. 2018;32(5):125462. Recommendations for hamstring injury prevention in elite football: translating research into practice. 2019 Feb;14(1):159-172. Scanlan SF, Chaudhari AMW, Dyrby CO. Hamstring Hamstring reinjuries occur at the same location and early after return to sport: a descriptive study of MRI-confirmed reinjuries. Campos GE, Luecke TJ, Wendeln HK, et al. Biophys J. Only one patient out of five achieves symmetrical knee function 6 months after primary anterior cruciate ligament reconstruction. 2016;24(1):7783. Calf pain after acl surgery Int J Sports Med. Identification of athletes at future risk of anterior cruciate ligament ruptures by neuromuscular screening. WebHamstring strengthening during ACL rehabilitation should be periodized and carefully planned, exposing patients to increasing muscle lengths, intensities and velocities over time. J Biomech. Arthroscopy. Higashihara A, Nagano Y, Ono T, et al. Aman JE, Elangovan N, Yeh IL, Konczak J. The https:// ensures that you are connecting to the Every time the quarterback drops back to pass, he only has a second or two before a defensive lineman is on top of him, hitting him harder and harder every snap. 2012;94:127482. 2000;89(6):21915. Sports Med. 2011;39:53843. J Orthop Sports Phys Ther. 1993;18:36873. Diagnosis. Anterior Cruciate Ligament Reconstruction: What to Freckleton G, Pizzari T. Risk factors for hamstring muscle strain injury in sport: a systematic review and meta-analysis. Suchomel TJ, Wagle JP, Douglas J, et al. Bittencourt NFN, Meeuwisse WH, Mendona LD, et al. 2003;33(11):6716. 2007;35(3):36873. A new framework for research leading to sports injury prevention. Scand J Med Sci Sports. Strength deficits identified with concentric action of the hip extensors and eccentric action of the hamstrings predispose to hamstring injury in elite sprinters. Update on functional recovery process for the injured athlete: return to sport continuum redefined. This is usually 24 to 48 hours. J Biomech. Hamstring Cramps 2000;23:5738. and transmitted securely. J Orthop Res. Weeks 12 Immediately after surgery, youll likely have a lot of swelling and pain. Leetun DT, Ireland ML, Willson JD, et al. Fifteen-year audit of anterior cruciate ligament reconstructions in the Australian Football League from 1999 to 2013: return to play and subsequent ACL injury. If the sensors determine length or load are beyond their limits, they send an alert signal, which locks the muscle down with a cramp. 2019 Feb;33(1):33-47. Matthew Buckthorpe. Hgglund M, Waldn M, Ekstrand J. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. Clin J Sport Med. Google Scholar. Orthopedics. J Electromyogr Kinesiol. Br J Sports Med. official website and that any information you provide is encrypted Myer GD, Ford KR, Barber Foss KD, et al. 2002;25:4915. Evaluation of muscle size and fatty infiltration with MRI nine to eleven years following hamstring harvest for ACL reconstruction. In most cases, the graft is a tendon taken from your own knee or hamstring. MB conceived the idea for the manuscript and wrote the first versions of the manuscript. 2013;14(4):18898. In some cases, the graft comes from a donor. Optimising the 'mid-stage training and testing process after ACL reconstruction. Frobell RB, Roos EM, Roos HP, Ranstam J, Lohmander LS. PMC 2018;28(2):65866. 2016;50:13567. 2015;47(4):85765. Arnason A, Sigurdsson SB, Gudmundsson A, et al. Lorenz DS, Reiman MP, Walker JC. Br J Sports Med. 2014;24(6):e5019. 1993;21:2317. 2014;114(12):36574. Predicting maximum eccentric strength from surface EMG measurements. Cacchio A, Don R, Ranavolo A, et al. Br J Sports Med. Br J Sports Med. 2015;49:2789. Res Sports Med. PubMed In this paper, the authors discuss the deficits in hamstring function after ACLR, the considerations on how to restore these deficits and align this information to the ACLR functional recovery process, providing recommendation on how to recover hamstring function after ACLR. 200(3), 1977. 2004;86:193646. Front Physiol. PubMed Central 2018;52(10):6289. The impact of metabolic stress on hormonal responses and muscular adaptations. 2014 Feb;24(1):98-103. 2012;40(1):15262. Salpeter, Garrett. Sports Med. Effects of eccentric strength training on biceps femoris muscle architecture and knee joint range of movement. Recommendations for Hamstring Function Recovery After ACL Position stand: progression models in resistance training for healthy adults. The effectiveness of proprioceptive training for improving motor function: a systematic review. Clin J Sport Med. Am J Sports Med. J Biomech. Concentric and eccentric knee muscle strength. Please enable it to take advantage of the complete set of features! Scand J Med Sci Sports. The effects of isometric and isotonic training on hamstring stiffness and anterior cruciate ligament loading mechanisms. ACL Recovery After an ACL injury or ACL surgery, many athletes report experiencing increased frequency of muscle cramping. The main cause of injury to the hamstring is muscle overload. Br J Sports Med. ACL So why does it happen? 2015;43(7):16629. Psychological aspects of anterior cruciate ligament injuries. Recommendations for Hamstring Function Recovery After ACL One important consideration after ACLR is the recovery of hamstring muscle function, particularly when using ipsilateral hamstring autograft. Bien DP, Dubuque TJ. Lorenz D, Morrison S. Current concepts in periodization of strength and conditioning for the sports physiotherapist. Prospectively identified deficits in sagittal plane hip-ankle coordination in female athletes who sustain a second anterior cruciate ligament injury after anterior cruciate ligament reconstruction and return to sport. Int J Sports Phys Ther. ACL Tear Treatment and Reconstruction PLoS One. Hamstring cramps may result from improperly warming up for an activity or doing too much activity. Once youve torn your ACL, you cannot sew the end of the ACL back together. 2012;33(12):10004. Influence of anterior cruciate ligament tear on thigh muscle strength and hamstring-to-quadriceps ratio: a meta-analysis. Goto K, Ishii N, Kizuka T, et al. Ristanis S, Tsepis E, Giotis D, et al. Sports Med. Tillin NA, Pain MTG, Folland JP. 2015;10:94654. ACL Reconstruction Rehabilitation Guidelines- Hamstring Ardern CL, Kvist J, Webster KE. Brockett CL, Morgan DL, Proske U. 2010;43(9):181722. Br J Sports Med. Konrath JM, Vertullo CJ, Kennedy BA, et al. The relationship between static posture and ACL injury in female athletes. Muscles Ligaments Tendons J. As time goes on, youll have times you do too much, such as push therapy too hard, accidentally causing the knee to swell. Kuszewski M, Gnat R, Saulicz E. Stability training of the lumbo-pelvo-hip complex influence stiffness of the hamstrings: a preliminary study. Hamstring Pain Hamstring Nomura Y, Kuramochi R, Kukubayashi T. Evaluation of hamstring muscle strength and morphology after anterior cruciate ligament reconstruction. Muscles Cramp After ACL Surgery WebThere is limited information in the literature regarding hamstring pain and muscle strains in patients following anterior cruciate ligament (ACL) reconstruction using hamstring autograft. During the physical exam, your doctor will check your knee for swelling and tenderness comparing your injured knee to your uninjured knee. -. Med Sci Sports Exerc. Would you like email updates of new search results? Reiman MP, Lorenz DS. J Athl Train. Zebis MK, Andersen LL, Bencke J, et al. Unauthorized use of these marks is strictly prohibited. 2013;41(4):91823. Am J Sports Med. Zebis MK, Skotte J, Andersen CH, et al. The second the ACL tears, the nervous system recognizes the body has experienced a severe trauma. Before, when the offensive line was playing well, the quarterback was able to stay in rhythm. Scand J Med Sci Sports. However, the most common complications include pain in the front of the knee and loss of knee motion. 2016;50(12):74450. ACL Recovery After an ACL injury or ACL surgery, many athletes report experiencing increased frequency of muscle cramping. n a sense, the cramps that athletes experience during the ACL recovery process are a, Heres How ACL Injuries Can Be A Blessing In Disguise, Getting Past Mental Blocks After ACL Reconstruction Surgery, Click To Find Out If You Qualify For A 2 Day Trial, Supercharge Your ACL Prehab Exercises With The Neubie, 8 Exercises Utilized In The Accelerate ACL Prehab Protocol, 4 Important Types Of ACL Prehab Exercises, 8 ACL Prehab Goals To Hit If You Want To Go Into Surgery Feeling 100%. ACL You will feel tired for several days. Eur J Appl Physiol. Blanch P, Gabbett TJ. It locks down muscles responsible for generating forces around the knee joint by rapidly shortening the muscle what we know as cramps. Complex systems approach for sports injuries: moving from risk factor identification to injury pattern recognitionnarrative review and new concept. Hamstring cramps may result from improperly warming up for an activity or doing too much activity. Electrical stimulation promotes wound healing by enhancing dermal fibroblast activity and promoting myofibroblast transdifferentiation. Orchard JW. Wakahara T, Fukutani A, Kawakami Y, et al. Dill KE, Begalle RL, Frank BS, et al. North American Orthopedic Rehabilitation Research Network. This may explain why some studies find weakness when the hamstring muscles are tested after this kind of ACL repair. 2009;105(6):93944. Oxford: Elsevier Health Sciences; 2013. There is a need to know how to train the hamstrings, but also apply this to the ACLR athlete. The impact of instability resistance training on balance and stability. The main cause of injury to the hamstring is muscle overload. J Appl Physiol. 1976;98:2326. Article If you do not have access to massage then a Foam roller is an excellent substitute and should form part of your warm-up routine. 2018;10:23. https://doi.org/10.1186/s13102-018-0112-6 ((eCollection 2018)). Biceps femoris aponeurosis size: a potential risk factor for strain injury? Hawkins D, Hull ML. Oakley AJ, Jennings J, Bishop CJ. Arnason A, Andersen TE, Holme I, et al. Buckthorpe MW, Erskine R, Fletcher G, Folland F. Neural adaptations explain the task specificity of strength changes after resistance training. 2016;50:153640. Google Scholar. April 30-May 2, 2009, Fells Point, Baltimore, MD. Weeks 12 Immediately after surgery, youll likely have a lot of swelling and pain. Bennell K, Wajswelner H, Lew P, et al. Med Sci Sports Exerc. PubMedGoogle Scholar. Intrinsic risk factors for hamstring injuries among male soccer players: a prospective cohort study. Hamstring Tendon Graft Reconstruction of ACL Implementing eccentric resistance trainingpart 1: a brief review of existing methods. 2020;54(9):5129. 2016;44(2):35561. Unable to load your collection due to an error, Unable to load your delegates due to an error. Srp Arh Celok Lek. Res Q Exerc Sport. Petersen J, Thorborg K, Nielsen MB, et al. Hamstring stretch The first goal of treatment is to reduce pain and swelling. Chumanov ES, Heiderscheit BC, Thelen DG. Hamstring Pain Knee Extension Range of Motion at 4 Weeks Is Related to Knee Extension Loss at 12 Weeks After Anterior Cruciate Ligament Reconstruction. 2013;47:3518. Google Scholar. Learn how we can help. Br J Sports Med. Dorn TW, Schache AG, Pandy MG. Verhagen E. If athletes will not adopt preventive measures, effective measures must adopt athletes. WebHamstring strengthening during ACL rehabilitation should be periodized and carefully planned, exposing patients to increasing muscle lengths, intensities and velocities over time. 2000;89:224957. Am J Sports Med. 2019;49(5):2948. ACL Recovery After an ACL injury or ACL surgery, many athletes report experiencing increased frequency of muscle cramping. 2016;44:258998. Hamstring muscle injuries in elite football: translating research into practice. That will initially be from the surgery. J Exp Zool. Differences in hamstring activation characteristics between the acceleration and maximum-speed phases of sprinting. Br J Sports Med. Apply ice packs several times a day to 2017;51:10218. Hamstring Mendiguchia J, Garrues MA, Cronin JB, et al. Ardern CL, Webster KE, Taylor NF, et al. This study was reviewed by Dr Teddy Willsey in the February 2021 issue of the Research Reviews. WebIf you develop a fever, intense calf pain, excessive drainage from the incision, uncontrolled pain or any other symptoms you have concerns about you should call your doctor. Sterns KM, Pollard CD. Gabbe BJ, Bennell KL, Finch CF. -, Lai CCH, Feller JA, Webster KE. J Orthop Sports Phys Ther. WebSure: Muscle and calf discomfort is normal a week after acl surgery, esp. Eur J Appl Physiol. At 6 months post-op, 67% of patients with patellar tendon graft had an average knee flexor limb symmetry index (LSI) >90%, while only 46% of patients with hamstring tendon graft achieved this symmetry. The most common graft used for ACL reconstructions is a hamstring tendon graft. 2014;46(8):152537. 2004;14:17685. Changes in muscle architecture of biceps femoris induced by eccentric strength training with Nordic hamstring exercise. Muscle strain is the most common cause of cramps. 2007;17(1):1824. Quadriceps and hamstring strength recovery during early neuromuscular rehabilitation after ACL hamstring-tendon autograft reconstruction. The aim of this paper was to discuss important alterations of the hamstring muscles after ACL reconstruction (ACLR), consider their implications for program design, and guide clinicians on how to apply this information. Try our Research Reviews for free now for 7 days! Deficits in knee flexion strength can play a large role in ACL re-injury and should be more carefully measured during the return to sport decision-making process. Once youve torn your ACL, you cannot sew the end of the ACL back together. 2014;49(6):72332. 1988;20(Supplement 5):S13545. Am J Sports Med. Crosier JL, Ganteaume S, Binet J, et al. Isokinetic strengths of the quadriceps and hamstring muscles and endurances were compared between a group of 20 patients undergoing PCLR using a tibialis anterior allograft and a 1:2 matched control group of 40 patients undergoing ACLR using a hamstring autograft at 2 years after the operations. Morgan DL. de Breno AR, Alvares J, Marques VB, Vaz MA, et al. Hamstrings are most susceptible to injury during the late swing phase of sprinting. 2016;50(12):74450. Deficits in neuromuscular control of the trunk predict knee injury risk: a prospective biomechanicalepidemiological study. government site. The use of hamstring tendon graft in ACLR can result in chronic neuromuscular inhibition and persistent hamstring strength deficits more pronounced during eccentric than concentric activation. Holistic hamstring health: not just the Nordic hamstring exercise. 2018 Mar 1;100-B(3):271-284. 2013;31(14):154552. sharing sensitive information, make sure youre on a federal Google Scholar. The main cause of injury to the hamstring is muscle overload. 2014;8:1075. A randomized trial of treatment for acute anterior cruciate ligament tears. Gabbett TJ. Provided by the Springer Nature SharedIt content-sharing initiative, Over 10 million scientific documents at your fingertips, Not logged in van Melick N, van Cingel RE, Brooijmans F, et al. You must be logged in to post or like a comment. Grindem H, Snyder-Mackler L, Moksnes H, et al. In some cases, the graft comes from a donor. He or she may also move your knee into a variety of positions to assess range of motion and overall function of the joint. If you are using crutches and not fully weight bearing on the operative side.Pain Read More. The authors wrote a review article utilizing 217 papers on a variety of topics on ACLR, hamstring injury, and the lower extremity. WebIf you develop a fever, intense calf pain, excessive drainage from the incision, uncontrolled pain or any other symptoms you have concerns about you should call your doctor. WebIf you develop a fever, intense calf pain, excessive drainage from the incision, uncontrolled pain or any other symptoms you have concerns about you should call your doctor. In some cases, the graft comes from a donor. 2016;44(7):178995. Integration of strength and conditioning principles into a rehabilitation program. Angelozzi M, Madama M, Corsica C, et al. 2017;51:168894. Orthop J Sports Med. 2017;51(5):46977. Fousekis K, Tsepis E, Poulmedis P, et al. Shorter muscle length exercises might be preferable during the early post-operative period, such as the prone leg curl, standing leg curl, and bridge. Knee flexor strength and endurance profiles after ipsilateral hamstring tendons anterior cruciate ligament reconstruction. Rate of force development as an adjunctive outcome measure for return-to-sport decisions after anterior cruciate ligament reconstruction. However, the most common complications include pain in the front of the knee and loss of knee motion. Br J Sports Med. The younger hamstring graft is too stiff Younger patients have worse surgical outcomes. So why does it happen? Buckthorpe M. Optimising the late-stage rehabilitation and return-to-sport training and testing process after ACL reconstruction. Mechanisms of anterior cruciate ligament injury in basketball: video analysis of 39 cases. Palmieri-Smith RM, Lepley LK. WebThere is limited information in the literature regarding hamstring pain and muscle strains in patients following anterior cruciate ligament (ACL) reconstruction using hamstring autograft. J Sports Med Phys Fit. Hamstring Tendon Graft Reconstruction of Paterno MV, Rauh MJ, Schmitt LC, Ford KR, Hewett TE. 1990;57(2):20921. Clinical outcomes and return-to-sports participation of 50 soccer players after Anterior Cruciate Ligament reconstruction through a sport-specific rehabilitation protocol. Effects of three resistance training programs on muscular strength and absolute and relative endurance. Br J Sports Med. Generally, it takes at least 9 months to recover after ACL reconstruction surgery. Vertullo CJ, Konrath JM, Kennedy B, et al. 2002;34(9):140813. ACL injury, the resultant surgery and reduced functionality after surgery significantly impact on hamstring function, with deficits of nearly 50% reported at 4 weeks after ACLR with hamstring tendon autograft (HG) [ 19 ]. Cramp in the Hamstring Muscles Neural inhibition during maximal eccentric and concentric quadricep contraction: effects of resistance training. Br J Sports Med. Patients can expect a 70% return-to-sport within seven years after ACL Reconstruction. 2011;43:37584. Curr Sports Med Rep. 2020 Feb;19(2):76-83. Scand J Med Sci Sports. Sports Med. Arthroscopy. Glasgow P, Phillips N, Bleakley C. Optimal loading: key variables and mechanisms. 2001;29:3003. PubMed The vertical drop jump is a poor screening test for ACL injuries in female elite soccer and handball players: a prospective cohort study of 710 athletes. Biceps femoris architecture and strength in athletes with a previous anterior cruciate ligament reconstruction. Strains and tears happen when the muscle is lengthening as it contracts or shortens. Calf pain after acl surgery Knee extensor and flexor strength before and after anterior cruciate ligament reconstruction in a large sample of patients: influence of graft type. Causes. J Electromyogr Kinesiol. 2015;43(11):266370. Br J Sports Med. Biomech. Previous injury as a risk factor for injury in elite football: a prospective study over two consecutive seasons. Front Hum Neurosci. Pain MT, Forrester SE. If you are using crutches and not fully weight bearing on the operative side.Pain Read More. This requires in part more high-quality original research, but also an approach to translate existing research into practice to overcome the research to implementation barriers. An official website of the United States government. The effect of high or low volume Nordic hamstring exercise training on eccentric strength and biceps femoris long head architectural adaptations. Meta-analysis of meta-analyses of anterior cruciate ligament injury reduction training programs. Br J Sports Med. 2018;36(10):2696708. Heres the 11 other studies from our February issue just published here: Every month our team of experts break down clinically relevant research into five-minute summaries that you can immediately apply in the clinic. Harput G, Kilinc HE, Ozer HE, et al. Br J Sports Med. Herman DC, Weinhold PS, Guskiewicz KM, Garrett WE, Yu B, Padua DA. Learn how we can help. 2005;21:125765. 2012;42(9):77280. 2017;20:2504. Evangelidis PE, Massey GJ, Pain MT, et al. 2017;12:71827. After ACLR and the early post-operative period, there are often considerable deficits in hamstring function which need to be overcome as part of the functional recovery process. Anterior cruciate ligament strain and tensile forces for weight-bearing and non-weight-bearing exercises: a guide to exercise selection. Mangine GT, Hoffman JR, Wang R, et al. Int J Sports Phys Ther. Buckthorpe M, La Rosa G, Villa FD. Impact of the Nordic hamstring and hip extension exercises on hamstring architecture and morphology: implications for injury prevention. Finch CF. 2012;42(3):20820. Hamstring Generally, it takes at least 9 months to recover after ACL reconstruction surgery. Timmins RG, Bourne MN, Shield AJ, et al. Alonso-Fernandez D, Docampo-Blanco P, Martinez-Fernandez J. Br J Sports Med. Am J Sports Med. J Orthop Sports Phys Ther. J Orthop Sports Phys Ther. 1990;8:5763. J Orthop Sports Phys Ther. hamstring Folland JP, Williams AG. The role of neuromuscular inhibition in hamstring strain injury recurrence. Factors used to determine return to unrestricted sports activities after anterior cruciate ligament reconstruction. 2002;88(12):5060. It should include both short and long muscle length exercises, a mixed approach of hip extension and knee flexion, a specific focus on eccentric strength at long muscle lengths, and high-speed running. Buckthorpe M, Roi GS. Scand J Med Sci Sports. 2015;24(4):398404. 2016;44(8):211221. A method for determining lower extremity muscle-tendon lengths during flexion/extension movements. Differences in tibial rotation during walking in ACL reconstructed and healthy contralateral knees. Askling CM, Tengvar M, Tarassova O, Thorstensson A. J Sports Sci. Hamstring Function After ACL Reconstruction Learn how we can help. Learn how your comment data is processed. Hanson DW, Finch CF, Allegrante JP, et al. Diagnosis. WebACL Reconstruction Rehabilitation Guidelines- Hamstring graft The following rehabilitation guidelines are based upon current scientific literature and our clinical experience in rehabilitation of athletes following Anterior Accumulated workloads and the acute: chronic workload ratio relate to injury risk in elite youth football players. Zebis MK, Andersen LL, Bencke J, et al. A health care provider might suggest the following: Take a break from strenuous activities to allow the injury to heal. Impact of exercise selection on hamstring muscle activation. Escamilla RF, Macleod TD, Wilk KE, et al. PHASE I: IMMEDIATE POST-OP (0-2 WEEKS AFTER SURGERY) PHASE II: INTERMEDIATE POST-OP (3-5 WEEKS AFTER SURGERY) PHASE III: LATE POST-OP (6-8 WEEKS Draganich LF, Vahey JW. J Appl Physiol (1985). Phys Ther Sport. Intramuscular Tendon Injuries..A cause for concern in Hamstring rehabilitation? The Football Association Medical Research Programme: an audit of injuries in professional football- analysis of hamstring injuries. 2020;50(1):8399. Paterno MV, Schmitt LC, Ford KR, et al. Hamstring Function After ACL Reconstruction 2015;10:73447. Bourne MN, Timmins RG, Williams MD, et al. Biomechanical measures of neuromuscular control and valgus loading of the knee predict anterior cruciate ligament injury risk in female athletes: a prospective study. Knee Surg Sports Traumatol Arthrosc. Four weeks of Nordic hamstring exercise reduce muscle injury risk factors in young adults. 2016;44(11):282732. Clipboard, Search History, and several other advanced features are temporarily unavailable. Nagano A, Gerritsen KGM. In most cases, the graft is a tendon taken from your own knee or hamstring. Patellafemoral pain syndrome: proximal, distal and local factors, an international retreat. 1998;7:7795. Hamstring Tendon After ACL Surgery 2010;38:114753. Short biceps femoris fascicles and eccentric knee flexor weakness increase the risk of hamstring injury in elite football (soccer): a prospective cohort study. Am J Sports Med. Br J Sports Med. Carofino B, Fulkerson J. Medial hamstring tendon regeneration following harvest for anterior cruciate ligament reconstruction: fact, myth and clinical application. Br J Sports Med. Knee strength deficits after hamstring tendon and patellar tendon anterior cruciate ligament reconstruction. I. Initiation of frog limb regeneration by minute currents. Musculotendon variability influences tissue strains experienced by the biceps femoris long head muscle during high-speed running. Giles L, Webster KE, McClelland J, et al. Recommendations for Hamstring Function Recovery After ACL Sports Med. 2020;28(3):43341. Early emphasis on quadriceps strengthening in ACL rehabilitation has potential to overshadow the need for hamstring strengthening. Engebretsen AH, Myklebust G, Holme I, et al. Arthrosc Tech. 2005;35(1):4353. Oftentimes, this cramping occurs in the toes, calf, or hamstring. Br J Sports Med. A ligament needs to be reconstructed. Considerable deficits have been reported in hamstring function in the early post-operative period following anterior cruciate ligament (ACL) repair, as well as in the return to sport (RTS) period. 2016;50:8048. Fry A. ACL injury, the resultant surgery and reduced functionality after surgery significantly impact on hamstring function, with deficits of nearly 50% reported at 4 weeks after ACLR with hamstring tendon autograft (HG) [ 19 ]. Before Huber R, Viecelli C, Bizzini M, et al. Deviating running kinematics and hamstring injury susceptibility in male soccer players: cause or consequence? Duhig S, Shield AJ, Opar D, et al. Am J Sports Med. Your favorite (American) football team suddenly develops offensive line problems. Hamstring strength recovery after hamstring tendon harvest for anterior cruciate ligament reconstruction: a comparison between graft types. A ligament needs to be reconstructed. J Exp Biol. The most common graft used for ACL reconstructions is a hamstring tendon graft. Longitudinal changes in the lower extremity functional scale after anterior cruciate ligament reconstructive surgery.