ArticleJournal of physical therapy science2021
Effects of isometric contraction of the quadriceps on the hardness and blood flow in the infrapatellar fat pad.
Article in Journal of physical therapy science, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers, 1 of them a synthesis that pooled it.
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Who cites it
9 citing papers in PubMed, 1 synthesis or guideline pooled it, 11 citations in OpenAlex.
- Efficacy of lower limb strengthening exercises based on different muscle contraction characteristics for knee osteoarthritis: a systematic review and network meta-analysis.Frontiers in medicine · 2024Pooled it
- Ultrasound Characteristics of the Infrapatellar Fat Pad Under Physiological and Pathological Conditions.Sports medicine - open · 2026Review
- Ultrasonographic evaluation of fibrous structure and mechanical characteristics of the infrapatellar fat pad in female patients with knee osteoarthritis: a cross-sectional study.BMC musculoskeletal disorders · 2026Article
- Restricted morphological changes in infrapatellar fat pad during walking is revealed as a dynamics feature in symptomatic knee osteoarthritis.Journal of medical ultrasonics (2001) · 2026Article
- Article
- Effect of knee flexion angle on infrapatellar fat pad hemoglobin during isometric quadriceps exercise.Journal of physical therapy science · 2025Article
- Knee joint extension limitation in female patients with knee osteoarthritis affects the infrapatellar fat pad hardness and hemoglobin concentration by isometric quadriceps exercise.Osteoarthritis and cartilage open · 2025Article
- Validation of anterior ankle soft tissue dynamics and shear modulus for anterior ankle impingement syndrome after ankle fracture surgery.Scientific reports · 2024Article
- Effects of isometric loading intensity on patellar tendon microvascular response.Scandinavian journal of medicine & science in sports · 2022Article
Corrections and comments
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Authors and funding
5 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
[Purpose] This study aimed to clarify the influence of the isometric contraction of the quadriceps (ICQ) with low intensity on the circulation in the infrapatellar fat pad (IFP). [Participants and Methods] The participants were 7 males and 5 females, with an average age of 21.5 ± 1.4 years. IFP hardness was measured using shear wave ultrasound elastography and Biodex. Tissue oxygenation was measured via near-infrared spectroscopy using oxygenated hemoglobin (O2Hb), deoxygenated hemoglobin (HHb), and total hemoglobin (cHb) as indices. The mean values were calculated for three periods: 1 min of rest immediately before the exercise task (before ICQ), the lower limit of the 10 sets during the exercise task (during ICQ), and 3-4 min after the exercise task (after ICQ). IFP hardness was compared between resting conditions and ICQ, and tissue oxygenation was compared before, during, and after ICQ. [Results] ICQ significantly increased IFP hardness. Tissue hemoglobin, O2Hb, and cHb decreased significantly during ICQ and increased after ICQ compared to that before ICQ. HHb decreased during ICQ and recovered significantly after ICQ. [Conclusion] In healthy participants, low-intensity ICQ increases the hardness and oxygenation of the IFP. This study may partly explain the unknown pain relief mechanism of exercise therapy.
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