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COMPARISON OF THE NUMBER OF REPETITIONS AND PERCEIVED EXERTION BETWEEN MULTI-JOINT AND SINGLE-JOINT EXERCISE AT DIFFERENT INTENSITIES IN UNTRAINED WOMEN

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Author(s): Ramires Alsamir Tibana | Jonato Prestes | Dahan da Cunha Nascimento | Sandor Balsamo

Journal: Brazilian Journal of Biomotricity
ISSN 1981-6324

Volume: 5;
Issue: 2;
Start page: 96;
Date: 2011;
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Keywords: resistance training | exercise prescription | training load

ABSTRACT
TIBANA, R. A.; PRESTES, J.; NASCIMENTO, D. C.; BALSAMO, S. Comparison of the number of repetitions and perceived exertion between multi-joint and single-joint exercise at different intensities in untrained women. Brazilian Journal of Biomotricity, v. 5, n. 2, p. 96-105, 2011. The aim of the present study was to analyze the relationship between the total number of repetitions performed, perceived exertion (OMNI-RES, RPE) and selected percentage of repetition maximum (1RM) in untrained women. Nine women (age: 23.44 ± 5.81 years, height: 164 ± 0.05 cm, body mass: 63.86 ± 8.83 kg, BMI: 23.59 ± 2.51 kg.m2, percentage (%) fat: 25.89 ± 6.98%) with at least 6 months without training were selected. The experimental protocol consisted in carrying out 60, 80 and 90% of 1RM in two different exercises: multi-joint (leg press) and single-joint (knee extension), both unilaterally. Data were collected in five phases and the order of the tests was randomized. The first two phases were to test and verify the reliability (test-retest) of 1RM. Throughout the third, fourth and fifth phase, three tests were performed in two different exercises 60, 80 and 90% of 1RM separated by at least 48 hours. As expected, results indicated that subjects performed more repetitions at 60% 1RM compared to 80 and 90% of 1RM in both exercises. In the leg press exercise more repetitions were performed as compared with the leg extension, in all percentages of 1RM. In conclusion, the number of repetitions in a percentage of 1RM is influenced by the muscle mass involved and exercise type.
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