Existe déficit bilateral na realização de 10RM em exercícios de braços e pernas?

Abstract

Resistance exercises can be done uni or bilaterally. Depending on the way by which the movement is conducted, the presence of bilateral deficit (BD) is observed. BD studies have concentrated their effort on the investigation of the phenomenon in exercises done with one single maximum repetition and little is known about their behavior in exercises with many repetitions. The aims of this study were: a) to compare the load in 10 repetition maximum (10RM) in the different sides of the body in exercises done with arms and legs. b) To compare the sum of the unilateral actions with the bilateral results in the same exercises. Twenty trained women between 18 and 30 years old (24 ± 6) were evaluated in uni and bilateral 10RM test in the selected exercises. The statistics analysis was t-test paired, to verify the difference between limbs and the sum of the two limbs separately in relation to bilateral load. Significance level was p < 0.05 for all procedures. No difference was found in the manipulated loads in both members, the same not occurring with the sum of unilateral load compared to bilateral. This demonstrates that the practice of bilateral work in routine situation of training involving 10RM promotes a greater manipulation of load in relation to unilateral work, differently from what is seen in BD in 1RM. In conclusion, at least in the selected exercises, BD was not found. Future studies should be done for better understanding of the BD phenomenon during training routine.

Body composition, muscle strength and quality of active elderly women according to the distance covered in the 6-minute walk test

“…The loads applied followed the overload of the instrument itself in the form of plates, and when necessary, weights of 1, 2, and 3 kg were added. The instrument was regulated according to the size of the segment of the lower limbs of the volunteers 18 . The exercise chosen was bilateral knee extension on the chair.…”

Déficit bilateral em exercício multiarticular para membros superiores

“…It was observed that this phenomenon may be found through EMG 4 , in strength 3 and even in the EMG/strength ratio 7 and studied concerning maximum repetitions 19 . Thus, for better understanding, we can define bilateral myoelectrical deficit as light or remarkable decrease in the EMG signal (UM recruiting) during the development of bilateral work when compared with the sum of unilateral work.…”

Acute effect of intra-set static stretching on antagonists versus passive interval on the performance of maximum repetitions of agonists in leg extension machine

“…The knee extension exercise in the leg extension machine was described by Monteiro and Simão 26 as follows: The initial position was made with individual in the sitting position, with arms along the body holding the support of the apparatus, with trunk inclination at 70° and knee flexed at 90° with head in the Frankfurt plane; and the development of the exercise was performed from the initial position, the full extension of legs was performed. After the end of extension, legs returned to the initial position.…”