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セラチユキ フロレス エロイザ
Seratiuk Flores Heloisa
Heloisa Seratiuk Flores
所属
アジア・オセアニア研究教育機構 学術研究員
職名
学術研究員

論文

  • Biomechanical effects of saddle height changes in leisure cycling with unilateral transtibial prostheses: A simulated study

    Seratiuk Flores H, Wen Liang Y, Loh PY, Morinaga K, Muraki S

    PLOS ONE   20 ( 1 )   e0317121   2025年1月   ISSN:1932-6203

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    記述言語:英語  

    Cycling is a beneficial physical activity for rehabilitating individuals with lower-limb amputations and serves as a feasible leisure sport. However, the optimal bicycle configuration for cycling with a unilateral transtibial prosthesis at leisure levels has not been investigated. For saddle height at professional cycling levels, existing literature suggests utilizing the same configuration as that used by intact cyclists, where the knee reaches 25–35° at maximum extension. However, leisure cyclists tend to select lower saddle heights, and cycling with a unilateral transtibial prosthesis infers altered biomechanics during cycling practice. This study aimed to investigate the effects of cycling at different saddle heights with a simulated unilateral prosthesis. Ten able-bodied participants wore orthoses to simulate prosthetic conditions. The experimental task was performed on an ergometer at 40 W resistance, 60 rpm to simulate leisure cycling. Standard saddle height was defined as maximum knee extension of 45°. This height was used as the control condition and its trials were performed without orthoses. The variable heights were set as height percentage variations (-7%, -3.5%, 0, +3.5%, and +7%). Muscle activity, joint movement, force application to the pedals, perceived exertion, and comfort were evaluated. The -3.5% and -7% saddle heights resulted in joint movement and muscle activity levels closer to those in the control conditions, which also showed improved power symmetry between the affected and non-affected legs. In addition, the -3.5% height increased comfort level in participants. In conclusion, selecting lower saddle heights may be beneficial for unilateral transtibial amputees during leisure cycling. The optimal saddle height for this population may maintain maximum knee extension within the 37–45° range, dynamically measured on the affected side.

    DOI: 10.1371/journal.pone.0317121

    PubMed

  • Biomechanical Effects of Saddle Height in Cycling with Unilateral Transtibial Prostheses

    22nd Triennial Congress of the International Ergonomics Association 2024   2024年8月

  • Biomechanical Analysis of Recreational Cycling with Unilateral Transtibial Prostheses

    Prosthesis   2023年8月   ISSN:2673-1592

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    記述言語:英語  

    <jats:p>Leg prostheses specially adapted for cycling in patients with transtibial amputation can be advantageous for recreational practice; however, their required features are not fully understood. Therefore, we aimed to evaluate the efficiency of unilateral cycling with a transtibial prosthesis and the characteristics of different attachment positions (middle and tip of the foot) between the prosthetic foot and the pedal. The cycling practice was performed on an ergometer at 40 W and 60 W resistance levels while participants (n = 8) wore custom-made orthoses to simulate prosthesis conditions. Using surface electromyogram, motion tracking, and power meter pedals, biomechanical data were evaluated and compared with data obtained through regular cycling. The results showed that power delivery became more asymmetrical at lower workloads for both orthosis conditions, while hip flexion and muscle activity of the knee extensor muscles in the sound leg increased. While both pedal attachment positions showed altered hip and knee joint angles for the leg wearing the orthosis, the middle of the foot attachment presented more symmetric power delivery. In conclusion, the middle of the foot attachment position presented better symmetry between the intact and amputated limbs during cycling performed for rehabilitation or recreation.</jats:p>

    DOI: 10.3390/prosthesis5030052

  • Simulating Prosthesis Conditions in Cycling: a Comparative Study

    24th Congress of International Society of Biomechanics   2023年8月

  • 日常でのサイクリングのための下腿義足のバイオメカニクス的研究

    第 7 回 アダプテッドスポーツ・ライフ 科学研究会   2022年8月

  • Transtibial Leg Prostheses: Applications to the Practice of Cycling

    SERATIUK FLORES Heloísa, YEOH Wen Liang, MORINAGA Kyosuke, MURAKI Satoshi

    人間工学   58 ( Supplement )   2E2-01 - 2E2-01   2022年7月   ISSN:05494974 eISSN:18842844

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    記述言語:英語   出版者・発行元:一般社団法人 日本人間工学会  

    DOI: 10.5100/jje.58.2e2-01

    CiNii Research

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