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Isokinetic Knee Strength, Bilateral Muscle Balance, and Anaerobic Performance in Adolescent Athletes (ISOK-WAnT)

2026年11月2日 更新者：Assoc. Prof. Dr. Özgür EKEN、Inonu University

Relationship of Isokinetic Knee Strength and Bilateral Muscle Balance With Anaerobic Performance in Adolescent Athletes

This study looks at how strong the knee muscles are in adolescent athletes and how this strength relates to short-term, high-intensity (anaerobic) performance. Strong, well-balanced thigh muscles may help athletes produce more power during sport movements, but this has not been studied well in teenagers. Male athletes aged 15-16 years will be measured on two separate days. On the first day, their height and body weight will be measured and the strength of the muscles at the front (quadriceps) and back (hamstrings) of both thighs will be tested on a special strength-testing machine. On the second day, they will do a 30-second all-out cycling test to measure anaerobic power. The study will compare the right and left legs and will examine whether knee muscle strength and the balance between the front and back thigh muscles are linked to power output during the cycling test. No treatment or intervention will be given. The results may help coaches and sports scientists understand the physical development of adolescent athletes.

研究概览

地位

尚未招聘

条件

干预/治疗

详细说明

Lower-limb strength and anaerobic power are important parts of the physical profile of adolescent athletes in high-intensity sports such as wrestling. Isokinetic dynamometry allows knee extensor (quadriceps) and flexor (hamstring) strength and the balance between these muscle groups to be measured objectively, while the 30-second Wingate Anaerobic Test (WAnT) is a widely used laboratory test of anaerobic performance. Evidence on how these measures relate to each other in adolescent athletes is limited.

This is a cross-sectional, correlational observational study. Twenty-one male adolescent athletes aged 15-16 years will be recruited in Malatya, Turkey. Written informed consent will be obtained from parents or legal guardians, and assent from participants. Testing will take place on two separate days to limit fatigue. Participants will avoid heavy exercise for 48 hours and caffeine for 12 hours before testing.

Day 1: Height and body mass are measured and body mass index is calculated. Concentric knee extension and flexion are then tested bilaterally on a HUMAC NORM isokinetic dynamometer at 60, 120 and 180 degrees per second (three practice repetitions followed by five maximal repetitions at each speed; 45 seconds of rest between speeds and 10 minutes between limbs). Peak torque is recorded for the quadriceps and hamstrings of each limb, and the conventional hamstring-to-quadriceps (H/Q) ratio is calculated.

Day 2: Participants complete a 30-second WAnT on a mechanically braked cycle ergometer (Monark 874E) with a braking load of 0.075 kg per kg of body mass, after a standardized warm-up. Peak power, mean power and fatigue index are recorded.

Differences between the right and left limbs will be examined with paired-samples t-tests (with 95% confidence intervals and Cohen's dz). Associations between isokinetic variables and WAnT outcomes will be examined with Pearson correlation. The sample size (minimum 19) was calculated with G*Power for a correlation of r = 0.60 (alpha = 0.05, power = 0.80); 21 participants are planned to allow for possible data loss.

研究类型

观察性的

注册 (估计的)

21

联系人和位置

本节提供了进行研究的人员的详细联系信息，以及有关进行该研究的地点的信息。

学习联系方式

研究联系人备份

学习地点

  • 土耳其（türkiye）
    • Malatya
      • Malatya、Malatya、土耳其（türkiye）、44280
        • Department of Physical Education and Sport Teaching, Faculty of Sports Sciences, Inonu University,
        • 接触：
        • 接触：
        • 首席研究员：
          • Özgür Eken, PhD, Assoc. Prof
        • 副研究员：
          • Denizhan Caliskan, Dr.

参与标准

研究人员寻找符合特定描述的人，称为资格标准。这些标准的一些例子是一个人的一般健康状况或先前的治疗。

资格标准

适合学习的年龄

15年 至 16年 (孩子)

接受健康志愿者

是的

有资格学习的性别

男性

取样方法

非概率样本

研究人群

Male adolescent athletes aged 15-16 years who actively wrestle and train regularly in Malatya, Turkey. Participants are healthy athletes recruited from local clubs on a voluntary basis.

描述

Inclusion Criteria:

  • Actively practicing wrestling in Malatya, Turkey
  • Male, aged 15-16 years
  • At least 2 years of regular training (at least 2 days per week)
  • No lower-extremity injury or surgery in the last 6 months
  • No musculoskeletal, cardiometabolic, or neurological condition that could prevent testing
  • Willing to participate in all planned tests
  • Written informed consent signed by parent or legal guardian, and assent from the participant

Exclusion Criteria: * Younger than 15 or older than 16 years

  • Lower-extremity injury or surgery within the last 6 months
  • Musculoskeletal, cardiometabolic, or neurological condition that could prevent testing
  • Open wound, varicose veins, acute inflammation, or history of thrombosis
  • Regular use of analgesic or anti-inflammatory medication or ergogenic supplements in the last 3 months
  • Unable to attend all planned testing sessions
  • Unwilling to follow the pre-test rules (no heavy exercise for 48 hours, no caffeine for 12 hours, usual training and diet)
  • Withdrawal during the study due to non-compliance, incomplete sessions, serious injury or illness, or participant request

学习计划

本节提供研究计划的详细信息，包括研究的设计方式和研究的衡量标准。

研究是如何设计的？

设计细节

  • 观测模型：COHORT
  • 时间观点：CROSS_SECTIONAL

队列和干预

团体/队列
干预/治疗
Adolescent Athletes

Male adolescent athletes aged 15-16 years who regularly train and compete. All participants complete anthropometric measurements, bilateral isokinetic knee strength testing, and the Wingate Anaerobic Test on separate days.
诊断测试：Isokinetic Knee Strength Testing

Bilateral concentric knee extension and flexion tested on an isokinetic dynamometer at 60, 120, and 180 degrees per second. Peak torque and the conventional hamstring-to-quadriceps ratio are recorded.

诊断测试：Wingate Anaerobic Test

A 30-second all-out cycling test on a mechanically braked cycle ergometer with a braking load of 0.075 kg per kg of body mass. Peak power, mean power, and fatigue index are recorded.

其他名称：
  • WAnT

研究衡量的是什么？

主要结果指标

结果测量
措施说明
大体时间
Isokinetic Peak Torque of the Knee Extensors and Flexors
大体时间：Day 1 of testing (single measurement session)

Peak torque (N·m) of the quadriceps and hamstrings, measured separately for the right and left limbs at 60, 120, and 180 degrees per second on an isokinetic dynamometer (highest value across five maximal concentric repetitions). Right-to-left differences and associations with Wingate Anaerobic Test outcomes are analyzed.
Day 1 of testing (single measurement session)
Wingate Anaerobic Test Peak Power
大体时间：Day 2 of testing (single measurement session)

Highest power output (W) achieved during the 30-second Wingate Anaerobic Test performed on a mechanically braked cycle ergometer with a braking load of 0.075 kg per kg of body mass.
Day 2 of testing (single measurement session)

次要结果测量

结果测量
措施说明
大体时间
Conventional Hamstring-to-Quadriceps (H/Q) Strength Ratio
大体时间：Day 1 of testing

Concentric hamstring peak torque divided by quadriceps peak torque, multiplied by 100 (%), calculated for each limb at 60, 120, and 180 degrees per second.
Day 1 of testing
Wingate Anaerobic Test Mean Power
大体时间：Day 2 of testing

Average power output (W) maintained across the 30-second Wingate Anaerobic Test.
Day 2 of testing
Wingate Anaerobic Test Fatigue Index
大体时间：Day 2 of testing

Percentage decline from peak power to the lowest power output during the test: [(peak power - minimum power) / peak power] × 100.
Day 2 of testing

合作者和调查者

在这里您可以找到参与这项研究的人员和组织。

赞助

Inonu University

调查人员

  • 首席研究员：Özgür Eken, PhD, Assoc. Prof.、Inonu University, Faculty of Sport Sciences
  • 研究主任：Denizhan Çalışkan, Dr.、Eskisehir Provincial Directorate of Youth and Sports, Eskisehir, Türkiye

出版物和有用的链接

负责输入研究信息的人员自愿提供这些出版物。这些可能与研究有关。

一般刊物

  • Aagaard, P., Simonsen, E. B., Magnusson, S. P., Larsson, B., & Dyhre-Poulsen, P. (1998). A new concept for isokinetic hamstring:quadriceps muscle strength ratio. The American Journal of Sports Medicine, 26(2), 231-237. Alemdaroğlu, U. (2012). The relationship between muscle strength, anaerobic performance, agility, sprint ability and vertical jump performance in professional basketball players. Journal of Human Kinetics, 31, 149-158. Chaabene, H., Negra, Y., Bouguezzi, R., Capranica, L., Franchini, E., Prieske, O., Hbacha, H., & Granacher, U. (2017). Physical and physiological attributes of wrestlers: An update. Journal of Strength and Conditioning Research, 31(5), 1411-1442. Iossifidou, A., Baltzopoulos, V., & Giakas, G. (2005). Isokinetic knee extension and vertical jumping: Are they related? Journal of Sports Sciences, 23(9), 1121-1127.

研究记录日期

这些日期跟踪向 ClinicalTrials.gov 提交研究记录和摘要结果的进度。研究记录和报告的结果由国家医学图书馆 (NLM) 审查，以确保它们在发布到公共网站之前符合特定的质量控制标准。

研究主要日期

学习开始 (估计的)

2026年12月28日

初级完成 (估计的)

2027年1月28日

研究完成 (估计的)

2027年1月28日

研究注册日期

首次提交

2026年11月2日

首先提交符合 QC 标准的

2026年11月2日

首次发布 (实际的)

2026年11月6日

研究记录更新

最后更新发布 (实际的)

2026年11月6日

上次提交的符合 QC 标准的更新

2026年11月2日

最后验证

2026年11月1日

更多信息

与本研究相关的术语

关键字

其他研究编号

  • INONU-ISOKINETIC-2026-01
  • IKINETIK-WAnT-2026 (其他标识符：Inonu University)

计划个人参与者数据 (IPD)

计划共享个人参与者数据 (IPD)？

不

IPD 计划说明

Individual participant data will not be shared, because participants are minors and the consent forms state that data will be used only for the purposes of this research and kept confidential. Aggregate results will be published.

药物和器械信息、研究文件

研究美国 FDA 监管的药品

不

研究美国 FDA 监管的设备产品

不

此信息直接从 clinicaltrials.gov 网站检索，没有任何更改。如果您有任何更改、删除或更新研究详细信息的请求，请联系 register@clinicaltrials.gov. clinicaltrials.gov 上实施更改，我们的网站上也会自动更新.

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