Evidence map›Paper›PMID 42412277›Full record

ArticleAnnals of biomedical engineering2026

Effects of Simulated Body-Mass Reduction on Peak Knee Joint Loads During Daily Functional Activities.

Tianyang Fan, Tao Ma, Xinyu Fan, Qianze Helian, Ruoying Hao, Tao Sun

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Article in Annals of biomedical engineering, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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1 · What the graph read from it

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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

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3 · Its place in the literature

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4 · The record

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5 · Who and what money

Authors and funding

6 authors.

Tianyang FanKey Laboratory of Mechanism Theory and Equipment Design of Ministry of Education, Tianjin University, Tianjin, 300354, China.
Tao MaKey Laboratory of Mechanism Theory and Equipment Design of Ministry of Education, Tianjin University, Tianjin, 300354, China. 2097808@163.com.
Xinyu FanKey Laboratory of Mechanism Theory and Equipment Design of Ministry of Education, Tianjin University, Tianjin, 300354, China.
Qianze HelianKey Laboratory of Mechanism Theory and Equipment Design of Ministry of Education, Tianjin University, Tianjin, 300354, China.
Ruoying HaoKey Laboratory of Mechanism Theory and Equipment Design of Ministry of Education, Tianjin University, Tianjin, 300354, China.
Tao SunKey Laboratory of Mechanism Theory and Equipment Design of Ministry of Education, Tianjin University, Tianjin, 300354, China.

Funding

Science Fund for Distinguished Young Scholars of Tianjin Municipality No. 22JCJQJC00050Tianjin Municipal Science and Technology Program 24JCZXJC00240Tianjin Municipal Science and Technology Program 24YDTPJC00010
6 · The paper itself

Abstract

purposeWhile weight management is a primary recommendation for individuals with or at risk of knee osteoarthritis (KOA), the isolated mechanical impact of body-mass reduction on knee joint loads remains incompletely understood. This study aimed to quantify the acute biomechanical responses of peak knee joint loads to simulated body-mass reduction across various daily functional activities.

methodsEleven healthy adults performed level walking, stair ascent, stair descent, stand-to-sit, and sit-to-stand under a simulated overweight baseline and three unloading conditions created by progressively reducing externally added loads using weighted vests and limb straps. Motion data were recorded using a motion capture system, and OpenSim was used to estimate tibiofemoral contact force, patellofemoral contact force, and knee joint moment.

resultsSimulated body-mass reduction generally reduced peak knee joint loads in a task-dependent manner. Peak tibiofemoral contact force decreased significantly across all tasks (p < 0.05), with pronounced reductions in high-flexion activities. Patellofemoral contact force and knee joint moment also decreased, although responses varied by task and variable. Furthermore, the magnitude of joint load reduction varied across the progressive stages of external unloading.

conclusionThe acute mechanical effects of simulated body-mass reduction on knee joint loads vary significantly across different functional tasks and joint compartments. These findings focus on the mechanical contribution of body-mass reduction to knee joint loading, providing quantitative biomechanical evidence to inform load-management strategies for individuals with excessive knee loading.

Indexed as

Daily functional activitiesExternal unloadingKnee joint loadsSimulated body-mass reduction

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Registered trials

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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.