Evidence map›Paper›PMID 40809664›Full record

ArticleCureus2025

Gait Analysis Using an Artificial Intelligence-Based Motion Capture System With a Single Smartphone Camera.

Takuya Usami, Masaya Kisohara, Kazuki Nishida, Daishiro Koboyashi, Ruido Ida, Kohki Matsubara, Haruhiko Tokuda, Nobuyuki Suzuki, Hideki Murakami, Gen Kuroyanagi

Abstract read
In one paragraph

Article in Cureus, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.

0numbers the graph read from it
0cells of the map it votes in
2citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

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.

2 · The registry

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.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

2 citing papers in PubMed.

  1. Article
  2. Review
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

10 authors.

Takuya UsamiDepartment of Orthopedic Surgery, Nagoya City University Graduate School of Medical Sciences, Nagoya, JPN.
Masaya KisoharaDepartment of Radiology, Nagoya City University Graduate School of Medical Sciences, Nagoya, JPN.
Kazuki NishidaCenter for Advanced Medicine and Clinical Research, Nagoya University Hospital, Nagoya, JPN.
Daishiro KoboyashiResearch and Development, Sportip Inc., Tokyo, JPN.
Ruido IdaDepartment of Rehabilitation Medicine, Nagoya City University Graduate School of Medical Sciences, Nagoya, JPN.
Kohki MatsubaraDepartment of Rehabilitation Medicine, Nagoya City University Graduate School of Medical Sciences, Nagoya, JPN.
Haruhiko TokudaDepartment of Metabolic Research, Research Institute, National Center for Geriatrics and Gerontology, Obu, JPN.
Nobuyuki SuzukiDepartment of Orthopedic Surgery, Nagoya City University Graduate School of Medical Sciences, Nagoya, JPN.
Hideki MurakamiDepartment of Orthopedic Surgery, Nagoya City University Graduate School of Medical Sciences, Nagoya, JPN.
Gen KuroyanagiDepartment of Orthopedic Surgery, Nagoya City University Graduate School of Medical Sciences, Nagoya, JPN.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

introductionMotion capture is widely used to analyze human gait and enables measurement of various biomechanical parameters. However, conventional infrared-based motion-capture systems are expensive and require a large amount of space, making them difficult to implement in many facilities. Recently, artificial intelligence (AI) has been applied in numerous medical fields, including gait analysis. This study aimed to evaluate the effectiveness of an AI-based motion capture system using a single smartphone camera compared to a conventional infrared-based motion capture system. METHODS AND ANALYSIS: Twenty-two straight walks of healthy volunteers were simultaneously captured using a smartphone (iPhone X

resultsThe shapes of the hip and knee flexion angle graphs in Group AI were similar to those in Group M. Variables, such as gait velocity, bilateral step length, and maximum flexion angle of the hip and knee joints, showed high accuracy. Most variables showed high correlation coefficients (gait velocity, r = 0.94; right and left step lengths, r = 0.91 and 0.93; right and left maximum flexion angle of the hip joint, r = 0.87 and 0.71; knee joint, r = 0.84 and 0.93; right and left minimum flexion angles of the hip joint, r = 0.73 and 0.75). However, low correlation coefficients were observed in gait cycle time (r = 0.68) and minimum knee flexion angle (right and left, r = 0.30 and 0.47).

conclusionOur findings suggest that an AI-based motion capture system using a single smartphone camera may provide reliable gait parameters for certain applications.

Indexed as

artificial intelligencegait analysisiphonemotion capturesmartphone camerasportip motion 3d

Identifiers

PMID40809664
PMCPMC12344543

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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.