Journal of Sports Science and Medicine
Journal of Sports Science and Medicine
ISSN: 1303 - 2968   
Ios-APP Journal of Sports Science and Medicine
Androit-APP Journal of Sports Science and Medicine
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©Journal of Sports Science and Medicine (2013) 12, 138 - 143

Research article
Effect of Different Rest Intervals, Between Sets, on Muscle Performance During Leg Press Exercise, in Trained Older Women
José C. Jambassi Filho1, , Lilian T. B. Gobbi2, André L. D. Gurjão1, Raquel Gonçalves1, Alexandre K. G. Prado1, Sebastião Gobbi1
Author Information
1 Laboratory of Physical Activity and Aging, Department of Physical Education, Institute of Biosciences, São Paulo State University (UNESP) at Rio Claro, SP, Brazil;
2 Posture and Gait Studies Laboratory, Department of Physical Education, Institute of Biosciences, São Paulo State University (UNESP) at Rio Claro, SP, Brazil

José C. Jambassi Filho
✉ São Paulo State University (UNESP), Department of Physical Education / Physical Activity and Aging Lab (LAFE), Avenida 24 A, 1515, Bela Vista, Rio Claro, SP, Brasil 13506-900
Email: jambassifilho@yahoo.com.br
Publish Date
Received: 27-10-2012
Accepted: 15-01-2013
Published (online): 01-03-2013
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ABSTRACT

The purpose of this study was to assess the effect of different rest intervals (RI) between sets on number of repetitions, sustainability of repetitions, and total volume during a leg press exercise. Seventeen resistance-trained older women (68.0 ± 5.9 years, 71. 2 ± 11.7 kg, 1.58 ± 0.07 m) participated in the study. All participants performed three sets to voluntary exhaustion, with loads that corresponded to 15 maximum repetitions, in two experimental sessions (that ranged from 48 to 72 hours apart). In each session, one of two RI (one-minute: RI-1 and three minute: RI-3) was tested, employing a randomized and counterbalanced design. For both RI, significant reductions (p < 0.05) were observed in the number of repetitions and sustainability of repetitions, from the first to the second and third sets. Differences (p < 0.05) between the RI also were observed in the two final sets. The total volume for the RI-3 session was statistically higher (29.4%, p < 0.05) as compared to the RI-1 session. The length of the RI between sets influenced the number of repetitions, sustainability of repetitions, and total volume. The longer RI should be used, therefore, when the goal of training is to increase the total volume.

Key words: Aging, muscle fatigue, muscle endurance, recovery.


           Key Points
  • This study examined the influence of rest intervals, between sets, on muscle performance during leg press exercise, in trained older women.
  • When multiple sets were performed to voluntary exhaustion, neither short and long rest interval (1 and 3 minutes, respectively) promoted the sustainability of repetitions in subsequent sets.
  • A longer rest interval seems to be necessary for a higher number of repetitions in subsequent sets, and with increase in time of tension and total volume.
 
 
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