Comparable regional hypertrophy of the knee extensor muscles in response to resistance training with machines versus free weights: a randomized within-subject approach.
Muscle hypertrophy response to resistance training (RT) with machines and free weights is widely debated in the literature. Understanding which form of exercise is superior for muscle hypertrophy has therapeutic and ergogenic repercussions. Therefore, we compared muscle hypertrophy response between...
| Publicado en: | Journal of Bodywork & Movement Therapies Vol. 45; pp. 562 - 569 |
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| Autores principales: | , , , , , , |
| Formato: | research randomized controlled trial Journal Article |
| Publicado: |
Churchill Livingstone, Inc.
Dec2025
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=189518966&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 189518966 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 13608592 8II jtl: Journal of Bodywork & Movement Therapies issn: 13608592 maglogo: N pubinfo: dt: Dec2025 vid: 45 pid: 1242 pub: Churchill Livingstone, Inc. artinfo: ui: 189518966 189518966 189518966 10.1016/j.jbmt.2025.09.027 189518966 ppf: 562 ppct: 7 formats: tig: atl: Comparable regional hypertrophy of the knee extensor muscles in response to resistance training with machines versus free weights: a randomized within-subject approach. aug: au: Amanuma, Magellan T. Ikeda, Pedro Luiz T. Sakamoto, Mariana T. Justino, Julio Cesar Abreu, Nicollas Silva de Sena Silva, Maria Vitória de Salles Painelli, Vitor affil: Strength Training Study and Research Group, Institute of Health Sciences, Paulista University, São Paulo, SP, Brazil sug: subj: Knee Joint Physiopathology Hypertrophy Rehabilitation Muscle Strengthening Methods Human Randomized Controlled Trials Random Assignment Adolescence Adult Pretest-Posttest Design Rectus Femoris Muscles Physiology Vastus Medialis Muscles Physiology Descriptive Statistics Comparative Studies Female Adolescent: 13-18 years Adult: 19-44 years Female ab: Muscle hypertrophy response to resistance training (RT) with machines and free weights is widely debated in the literature. Understanding which form of exercise is superior for muscle hypertrophy has therapeutic and ergogenic repercussions. Therefore, we compared muscle hypertrophy response between RT performed with free weights (FW) vs. machines (MACH). Randomized within-subject design. Eight young, healthy, untrained women (age: 22 ± 5 years; 62.0 ± 8.7 kg; 1.71 ± 0.05 m; BMI: 21.4 ± 3.3 kg m2) had each of their legs submitted to RT with FW or MACH. RT included exercises targeting the knee extensor muscles (FW: lunge; MACH: inclined leg press), 3 days·week−1, for 9 weeks. Muscle hypertrophy was determined pre- and post-RT through ultrasound to assess MT of the vastus lateralis (VL) and rectus femoris (RF) at their proximal (50 %) and distal (70 %) portions. The Mixed Model was conducted for data analysis, with significance set at p ≤ 0.05. No between-group differences were identified for any of the muscles and portions before RT (all comparisons, p > 0.05). MT increases were detected for both FW and MACH in RF50 % (respectively, +10.7 %, p = 0.027; and +8.9 %, p = 0.051), RF70 % (respectively, +24.8 %, p = 0.019; and +27.3 %, p = 0.017), VL50 % (respectively, +13.3 %, p = 0.011; and +12.1 %, p = 0.031) and VL70 % (respectively, +12.7 %, p = 0.046; and +15.7 %, p = 0.016), indicating that RT-induced muscle hypertrophy occurred across all muscles and portions. However, Group × Time interaction was not identified for RF50 % (p = 0.816), RF70 % (p = 0.588), VL50 % (p = 0.679) or VL70 % (p = 0.635) MT values. FW and MACH were comparably effective to induce muscle hypertrophy in previously untrained women. pubtype: Academic Journal doctype: research randomized controlled trial Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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