Are sEMG, Velocity and Power Influenced by Athletes’ Fixation in Paralympic Powerlifting?

Ialuska Guerra, Felipe J. Aidar, Gianpiero Greco, Paulo Francisco de Almeida-Neto, Michele De Candia, Breno Guilherme de Araújo Tinoco Cabral, Luca Poli, Mauro Mazini Filho, Roberto Carvutto, Ana Filipa Silva, Filipe Manuel Clemente, Georgian Badicu, Stefania Cataldi and Francesco Fischetti
Additional contact information
Ialuska Guerra: Federal Institute of Education, Science and Technology of Ceará (IFCE), Campus of Juazeiro do Norte, Juazeiro do Norte 63040-540, Brazil
Felipe J. Aidar: Department of Physical Education, Federal University of Sergipe (UFS), Saint Cristopher 49100-000, Brazil
Gianpiero Greco: Department of Basic Medical Sciences, Neuroscience and Sense Organs, University of Study of Bari, 70124 Bari, Italy
Paulo Francisco de Almeida-Neto: Department of Physical Education, Federal University of Rio Grande do Norte (UFRN), Natal 59078-970, Brazil
Michele De Candia: Department of Basic Medical Sciences, Neuroscience and Sense Organs, University of Study of Bari, 70124 Bari, Italy
Breno Guilherme de Araújo Tinoco Cabral: Department of Physical Education, Federal University of Rio Grande do Norte (UFRN), Natal 59078-970, Brazil
Luca Poli: Department of Basic Medical Sciences, Neuroscience and Sense Organs, University of Study of Bari, 70124 Bari, Italy
Mauro Mazini Filho: Graduate Program of the School of Physical Education and Sports, Federal University of Juiz de Fora, Juiz de Fora 36036-900, Brazil
Roberto Carvutto: Department of Basic Medical Sciences, Neuroscience and Sense Organs, University of Study of Bari, 70124 Bari, Italy
Ana Filipa Silva: Escola Superior Desporto e Lazer, Instituto Politécnico de Viana do Castelo, Rua Escola Industrial e Comercial de Nun’Álvares, 4900-347 Viana do Castelo, Portugal
Filipe Manuel Clemente: Escola Superior Desporto e Lazer, Instituto Politécnico de Viana do Castelo, Rua Escola Industrial e Comercial de Nun’Álvares, 4900-347 Viana do Castelo, Portugal
Georgian Badicu: Department of Physical Education and Special Motricity, Transilvania University of Brasov, 500068 Brasov, Romania
Stefania Cataldi: Department of Basic Medical Sciences, Neuroscience and Sense Organs, University of Study of Bari, 70124 Bari, Italy
Francesco Fischetti: Department of Basic Medical Sciences, Neuroscience and Sense Organs, University of Study of Bari, 70124 Bari, Italy

IJERPH, 2022, vol. 19, issue 7, 1-11

Abstract: The bench press is performed in parapowerlifting with the back, shoulders, buttocks, legs and heels extended over the bench, and the use of straps to secure the athlete to the bench is optional. Thus, the study evaluated muscle activation, surface electromyography (sEMG), maximum velocity (MaxV) and mean propulsive velocity (MPV), and power in paralympic powerlifting athletes under conditions tied or untied to the bench. Fifteen experienced Paralympic powerlifting male athletes (22.27 ± 10.30 years, 78.5 ± 21.6 kg) took part in the research. The sEMG measurement was performed in the sternal portion of the pectoralis major (PMES), anterior deltoid (AD), long head of the triceps brachii (TRI) and clavicular portion of the pectoralis major (PMCL). The MaxV, MPV and power were evaluated using an encoder. Loads of 40%, 60%, 80% and 100% 1RM were analyzed under untied and tied conditions. No differences were found in muscle activation between the tied and untied conditions; however, sEMG showed differences in the untied condition between AD and TRI (F (3112) = 4.484; p = 0.005) in the 100% 1RM load, between PMCL and AD (F (3112) = 3.743; p = 0.013) in 60% 1RM load and in the tied condition, between the PMES and the AD (F (3112) = 4.067; p = 0.009). There were differences in MaxV (F (3112) = 213.3; p < 0.001), and MPV (F (3112) = 248.2; p < 0.001), between all loads in the tied and untied condition. In power, the load of 100% 1RM differed from all other relative loads (F (3112) = 36.54; p < 0.001) in both conditions. The tied condition seems to favor muscle activation, sEMG, and velocity over the untied condition.

Keywords: muscle activation; dynamic force; bench belts; bench press; parapowerlifting (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2022
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