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Training in the Initial Range of Motion Promotes Greater Muscle Adaptations Than at Final in the Arm Curl.
Pedrosa, Gustavo F; Simões, Marina G; Figueiredo, Marina O C; Lacerda, Lucas T; Schoenfeld, Brad J; Lima, Fernando V; Chagas, Mauro H; Diniz, Rodrigo C R.
Afiliação
  • Pedrosa GF; Weight Training Laboratory, School of Physical Education, Physiotherapy and Occupational Therapy, Federal University of Minas Gerais, Lagoa Santa 31270-901, Brazil.
  • Simões MG; Brazilian Air Force, Aeronautical Instruction and Adaptation Center, Lagoa Santa 33400-000, Brazil.
  • Figueiredo MOC; Weight Training Laboratory, School of Physical Education, Physiotherapy and Occupational Therapy, Federal University of Minas Gerais, Lagoa Santa 31270-901, Brazil.
  • Lacerda LT; Weight Training Laboratory, School of Physical Education, Physiotherapy and Occupational Therapy, Federal University of Minas Gerais, Lagoa Santa 31270-901, Brazil.
  • Schoenfeld BJ; Weight Training Laboratory, School of Physical Education, Physiotherapy and Occupational Therapy, Federal University of Minas Gerais, Lagoa Santa 31270-901, Brazil.
  • Lima FV; Department of Physical Education, State University of Minas Gerais, Divinópolis 35501-170, Brazil.
  • Chagas MH; Department of Health Sciences, CUNY Lehman College, Bronx, New York, NY 10468, USA.
  • Diniz RCR; Weight Training Laboratory, School of Physical Education, Physiotherapy and Occupational Therapy, Federal University of Minas Gerais, Lagoa Santa 31270-901, Brazil.
Sports (Basel) ; 11(2)2023 Feb 06.
Article em En | MEDLINE | ID: mdl-36828324
ABSTRACT

OBJECTIVE:

The effects of ROM manipulation on muscle strength and hypertrophy response remain understudied in long-term interventions. Thus, we compared the changes in strength and regional muscle hypertrophy after training in protocols with different ranges of motion (ROM) in the seated dumbbell preacher curl exercise using a within-participant experimental design. DESIGN AND

METHODS:

Nineteen young women had one arm randomly assigned to train in the initial ROM (INITIALROM 0°-68°; 0° = extended elbow) while the contralateral arm trained in the final ROM (FINALROM 68°-135°), three times per week over an eight-week study period. Pre- and post-training assessments included one repetition maximum (1RM) testing in the full ROM (0°-135°), and measurement of biceps brachii cross-sectional area (CSA) at 50% and 70% of humerus length. Paired t-tests were used to compare regional CSA changes between groups, the sum of CSA changes at 50% and 70% (CSAsummed), and the strength response between the training protocols.

RESULTS:

The INITIALROM protocol displayed a greater CSA increase than FINALROM protocol at 70% of biceps length (p = 0.001). Alternatively, we observed similar increases between the protocols for CSA at 50% (p = 0.311) and for CSAsummed (p = 0.111). Moreover, the INITIALROM protocol displayed a greater 1RM increase than FINALROM (p < 0.001).

CONCLUSIONS:

We conclude that training in the initial angles of elbow flexion exercise promotes greater distal hypertrophy of the biceps brachii muscle in untrained young women. Moreover, the INITIALROM condition promotes a greater dynamic strength increase when tested at a full ROM compared to the FINALROM.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Sports (Basel) Ano de publicação: 2023 Tipo de documento: Article País de afiliação: Brasil

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Sports (Basel) Ano de publicação: 2023 Tipo de documento: Article País de afiliação: Brasil