ArticleInternational journal of environmental research and public health2023
The Influence of Hip and Knee Joint Angles on Quadriceps Muscle-Tendon Unit Properties during Maximal Voluntary Isometric Contraction.
Article in International journal of environmental research and public health, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers, 1 of them a synthesis that pooled it.
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The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
12 citing papers in PubMed, 1 synthesis or guideline pooled it.
- Pooled it
- Effect of knee and hip joint positions on passive stiffness of the rectus femoris and vastus lateralis in healthy individuals.Scientific reports · 2026Trial
- Article
- Concurrent Validity and Within-Session Reliability of a Wireless Surface Electromyography Device (MR EMG) Compared to a Criterion Measure During the Leg Extension Exercise.Sensors (Basel, Switzerland) · 2026Article
- Sensor-Based Assessment of Quadriceps EMG-Amplitude-to-Torque Ratios at Different Knee Angles: An Exploratory Cross-Sectional Study.Sensors (Basel, Switzerland) · 2026Article
- Rapid Torque Production of the Knee Extensors: An Integrative Analysis of Neuromuscular and Muscle-Tendon Determinants.Scandinavian journal of medicine & science in sports · 2026Article
- The impact of testing-parameter variability on force production in the isometric single-leg long-lever bridge: implications for training and testing rigor in sporting environments.BMC sports science, medicine & rehabilitation · 2025Article
- Influence of the Knee and Hip Joint Angles on the Knee Extensor Muscles and Tendon Shear Wave Velocity in Men and Prepubertal Boys.Translational sports medicine · 2025Article
- Long COVID-19 alters muscle architecture and muscle-tendon force transmission: a one-year longitudinal study.Frontiers in physiology · 2025Article
- Finite element-based prioritization of pelvic floor muscles for rehabilitation to maintain urinary and fecal control in elderly women.Frontiers in physiology · 2025Article
- Quantifying the effects of five rehabilitation training methods on the ability of elderly men to control bowel movements: a finite element analysis study.Frontiers in bioengineering and biotechnology · 2024Article
- Impact of Starting Knee Flexion Angle on Muscle Activity and Performance during Plyometrics without Jumping.Sensors (Basel, Switzerland) · 2023Article
Corrections and comments
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Authors and funding
10 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Determining how the quadriceps femoris musculotendinous unit functions, according to hip and knee joint angles, may help with clinical decisions when prescribing knee extension exercises. We aimed to determine the effect of hip and knee joint angles on structure and neuromuscular functioning of all constituents of the quadriceps femoris and patellar tendon properties. Twenty young males were evaluated in four positions: seated and supine in both 20° and 60° of knee flexion (SIT20, SIT60, SUP20, and SUP60). Peak knee extension torque was determined during maximal voluntary isometric contraction (MVIC). Ultrasound imaging was used at rest and during MVIC to characterize quadriceps femoris muscle and tendon aponeurosis complex stiffness. We found that peak torque and neuromuscular efficiency were higher for SUP60 and SIT60 compared to SUP20 and SIT20 position. We found higher fascicle length and lower pennation angle in positions with the knee flexed at 60°. The tendon aponeurosis complex stiffness, tendon force, stiffness, stress, and Young's modulus seemed greater in more elongated positions (60°) than in shortened positions (20°). In conclusion, clinicians should consider positioning at 60° of knee flexion rather than 20°, regardless if seated or supine, during rehabilitation to load the musculotendinous unit enough to stimulate a cellular response.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.