{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,11,2]],"date-time":"2026-11-02T21:15:20Z","timestamp":1793654120300,"version":"4.5.1"},"reference-count":55,"publisher":"MDPI AG","issue":"24","license":[{"start":{"date-parts":[[2022,12,18]],"date-time":"2022-12-18T00:00:00Z","timestamp":1671321600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IJERPH"],"abstract":"<jats:p>Background: The relationship between stiffness and drop jump performance in athletes in various stages of development has yet to be fully investigated. The first aim of this study was to investigate the association between the stiffness of the patellar and quadriceps tendon (PT, QT), gastrocnemius\u2013Achilles tendon unit (GAT), and rectus femoris (RF) using drop jump (DJ) performance in young basketball players. The second aim was to investigate possible variations in the stiffness levels of those tissues in different developmental stages. Methods: The stiffness levels of the GAT, PT, QT, and RF were measured in both limbs in 73 male basketball players aged 12 to 18 years. The reactive strength index (RSI), contact time (CT) and jump height (JH) during 30 and 40 cm DJs were also measured. Results: Pearson correlation coefficients showed a significant association between DJ performance and PT, QT, GAT, and RF dynamic stiffness. Moreover, the youngest subjects were found to have lower stiffness values than the older ones. Conclusions: Tissue stiffness can affect athletic performance by modifying the stretch-shortening cycle in young basketball players. Stiffness of muscles and tendons increases during the maturation process. Further investigations could shed light on the effect of training on the stiffness of muscles and tendons.<\/jats:p>","DOI":"10.3390\/ijerph192417017","type":"journal-article","created":{"date-parts":[[2022,12,19]],"date-time":"2022-12-19T05:55:43Z","timestamp":1671429343000},"page":"17017","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":25,"title":["Relationship between Muscle-Tendon Stiffness and Drop Jump Performance in Young Male Basketball Players during Developmental Stages"],"prefix":"10.3390","volume":"19","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-7112-1780","authenticated-orcid":false,"given":"Marco","family":"Gervasi","sequence":"first","affiliation":[{"name":"Department of Biomolecular Sciences, Division of Exercise and Health Sciences, University of Urbino Carlo Bo, 61029 Urbino, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Piero","family":"Benelli","sequence":"additional","affiliation":[{"name":"Department of Biomolecular Sciences, Division of Exercise and Health Sciences, University of Urbino Carlo Bo, 61029 Urbino, Italy"},{"name":"US Victoria Libertas Basketball, 61122 Pesaro, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Roberto","family":"Venerandi","sequence":"additional","affiliation":[{"name":"US Victoria Libertas Basketball, 61122 Pesaro, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4407-5376","authenticated-orcid":false,"given":"Eneko","family":"Fern\u00e1ndez-Pe\u00f1a","sequence":"additional","affiliation":[{"name":"Department of Physical Education and Sport, University of the Basque Country UPV\/EHU, 01007 Vitoria-Gasteiz, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2022,12,18]]},"reference":[{"key":"ref_1","unstructured":"CIES Sports Observatory Academic Team and FIBA (2020). International Basketball Migration Report, CIES Sports Observatory."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"e1","DOI":"10.1016\/j.scispo.2013.04.006","article-title":"The Relationship between Sprint Ability, Agility and Vertical Jump Performance in Young Soccer Players","volume":"30","author":"Koz","year":"2015","journal-title":"Sci. Sport."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"708","DOI":"10.1519\/JSC.0000000000001817","article-title":"Is Vertical Jump Height an Indicator of Athletes\u2019 Power Output in Different Sport Modalities?","volume":"32","author":"Kons","year":"2018","journal-title":"J. Strength Cond. Res."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"60","DOI":"10.5114\/hm.2021.100014","article-title":"Are Vertical Jump Height and Power Output Correlated to Physical Performance in Different Sports? An Allometric Approach","volume":"22","author":"Pupo","year":"2021","journal-title":"Hum. Mov."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"215824401663179","DOI":"10.1177\/2158244016631798","article-title":"Fitness, Balance Efficacy, and Postural Control in Community-Dwelling Older Adults","volume":"6","author":"Lee","year":"2016","journal-title":"Sage Open"},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"611","DOI":"10.1519\/JSC.0b013e31825dd2d9","article-title":"Performance Changes in NBA Basketball Players Vary in Starters vs. Nonstarters Over a Competitive Season","volume":"27","author":"Gonzalez","year":"2013","journal-title":"J. Strength Cond. Res."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"59","DOI":"10.5114\/biolsport.2021.101128","article-title":"Drop Jumps Improve Repeated Sprint Ability Performances in Professional Basketball Players","volume":"39","author":"Claus","year":"2022","journal-title":"Biol. Sport"},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"224","DOI":"10.1136\/bjsm.2006.034165","article-title":"The Role of Stretching in Tendon Injuries","volume":"41","author":"Witvrouw","year":"2007","journal-title":"Br. J. Sport. Med."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"825","DOI":"10.1152\/jappl.1991.70.2.825","article-title":"Optimal Stiffness of Series Elastic Component in a Stretch-Shorten Cycle Activity","volume":"70","author":"Wilson","year":"1991","journal-title":"J. Appl. Physiol."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"349","DOI":"10.1080\/00913847.2021.1943721","article-title":"Prospective Epidemiological Study of Basketball Injuries during One Competitive Season in Professional and Amateur Spanish Basketball","volume":"50","year":"2022","journal-title":"Phys. Sportsmed."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"284","DOI":"10.1177\/1941738109357303","article-title":"Injury in the National Basketball Association","volume":"2","author":"Drakos","year":"2010","journal-title":"Sports Health: A Multidiscip. Approach"},{"key":"ref_12","first-page":"161","article-title":"Injuries and Illnesses in the National Basketball Association: A 10-Year Perspective","volume":"35","author":"Starkey","year":"2000","journal-title":"J. Athl. Train."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"464","DOI":"10.1123\/ijspp.2014-0612","article-title":"Improvement of Repeated-Sprint Ability and Horizontal-Jumping Performance in Elite Young Basketball Players with Low-Volume Repeated-Maximal-Power Training","volume":"11","year":"2016","journal-title":"Int. J. Sport. Physiol. Perform."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"2080","DOI":"10.1249\/MSS.0000000000002024","article-title":"Muscle Stiffness of the Vastus Lateralis in Sprinters and Long-Distance Runners","volume":"51","author":"Miyamoto","year":"2019","journal-title":"Med. Sci. Sport. Exerc."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"1946","DOI":"10.1016\/j.jbiomech.2006.09.005","article-title":"Mechanical Properties of the Triceps Surae Tendon and Aponeurosis in Relation to Intensity of Sport Activity","volume":"40","author":"Arampatzis","year":"2007","journal-title":"J. Biomech."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"3386","DOI":"10.1519\/JSC.0000000000003315","article-title":"Countermovement Jump and Drop Jump Performances Are Related to Grand Jet\u00e9 Leap Performance in Dancers with Different Skill Levels","volume":"35","author":"Blanco","year":"2021","journal-title":"J. Strength Cond. Res."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"2762","DOI":"10.1519\/JSC.0b013e3181cc2408","article-title":"Bilateral Contact Ground Reaction Forces and Contact Times During Plyometric Drop Jumping","volume":"24","author":"Ball","year":"2010","journal-title":"J. Strength Cond. Res."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"815","DOI":"10.1016\/j.crad.2011.03.012","article-title":"Evaluation of Human Muscle Hardness after Dynamic Exercise with Ultrasound Real-Time Tissue Elastography: A Feasibility Study","volume":"66","author":"Yanagisawa","year":"2011","journal-title":"Clin. Radiol."},{"key":"ref_19","doi-asserted-by":"crossref","unstructured":"Konrad, A., and Paternoster, F.K. (2022). No Association between Jump Parameters and Tissue Stiffness in the Quadriceps and Triceps Surae Muscles in Recreationally Active Young Adult Males. Appl. Sci., 12.","DOI":"10.3390\/app12031596"},{"key":"ref_20","first-page":"223","article-title":"Relationship between Achilles Tendon Stiffness and Ground Contact Time during Drop Jumps","volume":"17","author":"Abdelsattar","year":"2018","journal-title":"J. Sport. Sci. Med."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"102549","DOI":"10.1016\/j.jelekin.2021.102549","article-title":"Relationship between Resting Medial Gastrocnemius Stiffness and Drop Jump Performance","volume":"58","author":"Ando","year":"2021","journal-title":"J. Electromyogr. Kinesiol."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"1190","DOI":"10.1016\/j.jbiomech.2009.11.028","article-title":"Mechanical Properties of the Patellar Tendon in Adults and Children","volume":"43","author":"Reeves","year":"2010","journal-title":"J. Biomech."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"75","DOI":"10.1111\/sms.12631","article-title":"Muscle and Tendon Adaptation in Adolescent Athletes: A Longitudinal Study","volume":"27","author":"Mersmann","year":"2017","journal-title":"Scand. J. Med. Sci. Sports"},{"key":"ref_24","first-page":"40","article-title":"The Evaluation of Jumping Ability of Male and Female Basketball Players According to Their Chronological Age and Major Leagues","volume":"13","author":"Kellis","year":"1999","journal-title":"J. Strength Cond. Res."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"1739","DOI":"10.1007\/s00421-017-3668-z","article-title":"Muscular Viscoelastic Characteristics of Athletes Participating in the European Master Indoor Athletics Championship","volume":"117","author":"Gervasi","year":"2017","journal-title":"Eur. J. Appl. Physiol."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"e7659","DOI":"10.1097\/MD.0000000000007659","article-title":"The Effect of Topical Thiocolchicoside in Preventing and Reducing the Increase of Muscle Tone, Stiffness, and Soreness","volume":"96","author":"Gervasi","year":"2017","journal-title":"Medicine"},{"key":"ref_27","doi-asserted-by":"crossref","unstructured":"Gervasi, M., Barbieri, E., Capparucci, I., Annibalini, G., Sisti, D., Amatori, S., Carrabs, V., Valli, G., Donati Zeppa, S., and Rocchi, M.B.L. (2021). Treatment of Achilles Tendinopathy in Recreational Runners with Peritendinous Hyaluronic Acid Injections: A Viscoelastometric, Functional, and Biochemical Pilot Study. J. Clin. Med., 10.","DOI":"10.3390\/jcm10071397"},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"389","DOI":"10.1007\/s00256-010-0918-0","article-title":"Elastography: Modality-Specific Approaches, Clinical Applications, and Research Horizons","volume":"40","author":"Li","year":"2011","journal-title":"Skelet. Radiol."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"2263","DOI":"10.1007\/s00421-015-3209-6","article-title":"Effects of Habitual Loading on Patellar Tendon Mechanical and Morphological Properties in Basketball and Volleyball Players","volume":"115","author":"Zhang","year":"2015","journal-title":"Eur. J. Appl. Physiol."},{"key":"ref_30","doi-asserted-by":"crossref","unstructured":"Kot, B.C.W., Zhang, Z.J., Lee, A.W.C., Leung, V.Y.F., and Fu, S.N. (2012). Elastic Modulus of Muscle and Tendon with Shear Wave Ultrasound Elastography: Variations with Different Technical Settings. PLoS ONE, 7.","DOI":"10.1371\/journal.pone.0044348"},{"key":"ref_31","doi-asserted-by":"crossref","unstructured":"Zhang, Z.J., Ng, G.Y., Lee, W.C., and Fu, S.N. (2014). Changes in Morphological and Elastic Properties of Patellar Tendon in Athletes with Unilateral Patellar Tendinopathy and Their Relationships with Pain and Functional Disability. PLoS ONE, 9.","DOI":"10.1371\/journal.pone.0108337"},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"51","DOI":"10.1123\/jsr.2010-0051","article-title":"Reliability, Validity, and Precision of a Handheld Myometer for Assessing in Vivo Muscle Stiffness","volume":"20","author":"Zinder","year":"2011","journal-title":"J. Sport Rehabil."},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"e000726","DOI":"10.1136\/bmjsem-2019-000726","article-title":"Myotonometry for the Evaluation of Achilles Tendon Mechanical Properties: A Reliability and Construct Validity Study","volume":"6","author":"Schneebeli","year":"2020","journal-title":"BMJ Open Sport Exerc. Med."},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"17064","DOI":"10.1038\/s41598-018-34719-7","article-title":"Assessing the Elastic Properties of Skeletal Muscle and Tendon Using Shearwave Ultrasound Elastography and MyotonPRO","volume":"8","author":"Feng","year":"2018","journal-title":"Sci. Rep."},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"1755","DOI":"10.1249\/MSS.0000000000000588","article-title":"Enhancing a Somatic Maturity Prediction Model","volume":"47","author":"Moore","year":"2015","journal-title":"Med. Sci. Sport. Exerc."},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"1801","DOI":"10.1249\/mss.0b013e31813e630a","article-title":"Effects of Plyometric and Weight Training on Muscle-Tendon Complex and Jump Performance","volume":"39","author":"Kubo","year":"2007","journal-title":"Med. Sci. Sport. Exerc."},{"key":"ref_37","unstructured":"Hopkins, W.G. (1997). A New View of Statistics, Will G. Hopkins."},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"29","DOI":"10.2478\/hukin-2022-0066","article-title":"Effects of Leg Stiffness Regulated by Different Landing Styles on Vertical Drop Jump Performance","volume":"83","author":"You","year":"2022","journal-title":"J. Hum. Kinet."},{"key":"ref_39","first-page":"232","article-title":"Effect of Instructions on Characteristics of Countermovement and Drop Jump Performance","volume":"9","author":"Young","year":"1995","journal-title":"J. Strength Cond. Res."},{"key":"ref_40","first-page":"561","article-title":"The Effect of Drop Jump Starting Height and Contact Time on Power, Work Performed, and Moment of Force","volume":"18","author":"Walsh","year":"2004","journal-title":"J. Strength Cond. Res."},{"key":"ref_41","doi-asserted-by":"crossref","first-page":"127","DOI":"10.1016\/j.ptsp.2010.10.001","article-title":"Quadricep and Hamstring Activation during Drop Jumps with Changes in Drop Height","volume":"12","author":"Peng","year":"2011","journal-title":"Phys. Ther. Sport"},{"key":"ref_42","doi-asserted-by":"crossref","first-page":"927","DOI":"10.1249\/MSS.0b013e31827f0314","article-title":"Predicting the Patellar Tendon Force Generated When Landing from a Jump","volume":"45","author":"Janssen","year":"2013","journal-title":"Med. Sci. Sport. Exerc."},{"key":"ref_43","doi-asserted-by":"crossref","first-page":"232596711557610","DOI":"10.1177\/2325967115576100","article-title":"Lower Extremity Kinematics During a Drop Jump in Individuals with Patellar Tendinopathy","volume":"3","author":"Rosen","year":"2015","journal-title":"Orthop. J. Sport. Med."},{"key":"ref_44","doi-asserted-by":"crossref","first-page":"384","DOI":"10.1136\/bjsm.37.5.384","article-title":"Risk Factors for Sports Injuries\u2014A Methodological Approach","volume":"37","author":"Bahr","year":"2003","journal-title":"Br. J. Sport. Med."},{"key":"ref_45","doi-asserted-by":"crossref","first-page":"2438","DOI":"10.1016\/j.jbiomech.2005.07.021","article-title":"Handling of Impact Forces in Inverse Dynamics","volume":"39","author":"Bisseling","year":"2006","journal-title":"J. Biomech."},{"key":"ref_46","doi-asserted-by":"crossref","first-page":"2250","DOI":"10.1249\/MSS.0000000000001361","article-title":"The Influence of External Load on Quadriceps Muscle and Tendon Dynamics during Jumping","volume":"49","author":"Earp","year":"2017","journal-title":"Med. Sci. Sport. Exerc."},{"key":"ref_47","doi-asserted-by":"crossref","unstructured":"Klich, S., Ficek, K., Krymski, I., Klimek, A., Kawczy\u0144ski, A., Madeleine, P., and Fern\u00e1ndez-de-las-Pe\u00f1as, C. (2020). Quadriceps and Patellar Tendon Thickness and Stiffness in Elite Track Cyclists: An Ultrasonographic and Myotonometric Evaluation. Front. Physiol., 11.","DOI":"10.3389\/fphys.2020.607208"},{"key":"ref_48","doi-asserted-by":"crossref","first-page":"e000446","DOI":"10.1136\/bmjsem-2018-000446","article-title":"Objective Assessment of Stiffness in Achilles Tendinopathy: A Novel Approach Using the MyotonPRO","volume":"4","author":"Morgan","year":"2018","journal-title":"BMJ Open Sport Exerc. Med."},{"key":"ref_49","doi-asserted-by":"crossref","unstructured":"Tumkur Anil Kumar, N., Oliver, J.L., Lloyd, R.S., Pedley, J.S., and Radnor, J.M. (2021). The Influence of Growth, Maturation and Resistance Training on Muscle-Tendon and Neuromuscular Adaptations: A Narrative Review. Sports, 9.","DOI":"10.3390\/sports9050059"},{"key":"ref_50","doi-asserted-by":"crossref","first-page":"54","DOI":"10.1055\/s-2007-972964","article-title":"Strength and Cross-Sectional Areas of Reciprocal Muscle Groups in the Upper Arm and Thigh During Adolescence","volume":"16","author":"Kanehisa","year":"1995","journal-title":"Int. J. Sport. Med."},{"key":"ref_51","doi-asserted-by":"crossref","first-page":"415","DOI":"10.1123\/jab.2013-0220","article-title":"Growth Changes in Morphological and Mechanical Properties of Human Patellar Tendon in Vivo","volume":"30","author":"Kubo","year":"2014","journal-title":"J. Appl. Biomech."},{"key":"ref_52","doi-asserted-by":"crossref","first-page":"57","DOI":"10.1007\/s40279-017-0785-0","article-title":"The Influence of Growth and Maturation on Stretch-Shortening Cycle Function in Youth","volume":"48","author":"Radnor","year":"2018","journal-title":"Sports Med."},{"key":"ref_53","doi-asserted-by":"crossref","first-page":"144","DOI":"10.1111\/j.1469-7580.2011.01461.x","article-title":"Age-Related Changes in Mechanical Properties of the Achilles Tendon","volume":"220","author":"Waugh","year":"2012","journal-title":"J. Anat."},{"key":"ref_54","doi-asserted-by":"crossref","first-page":"138","DOI":"10.1055\/s-2001-11337","article-title":"Growth Changes in the Elastic Properties of Human Tendon Structures","volume":"22","author":"Kubo","year":"2001","journal-title":"Int. J. Sport. Med."},{"key":"ref_55","doi-asserted-by":"crossref","first-page":"828","DOI":"10.1055\/s-0034-1367011","article-title":"A Cross-Sectional Study of the Plantar Flexor Muscle and Tendon during Growth","volume":"35","author":"Kubo","year":"2014","journal-title":"Int. J. Sport. Med."}],"container-title":["International Journal of Environmental Research and Public Health"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1660-4601\/19\/24\/17017\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T01:43:37Z","timestamp":1760147017000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1660-4601\/19\/24\/17017"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2022,12,18]]},"references-count":55,"journal-issue":{"issue":"24","published-online":{"date-parts":[[2022,12]]}},"alternative-id":["ijerph192417017"],"URL":"https:\/\/doi.org\/10.3390\/ijerph192417017","relation":{},"ISSN":["1660-4601"],"issn-type":[{"value":"1660-4601","type":"electronic"}],"subject":[],"published":{"date-parts":[[2022,12,18]]}}}