Length of Rest Interval Between Resistance Exercise Sets: Performance and Inter-Individual Variability of Ck Activity

Abstract

Purpose: To determine how the rest interval (RI) lengths of 30 and 90 s between sets of biceps curl exercise affect the total volume of work performed and serum CK activity, and to verify the relationship between inter-individual variability of CK activity and total volume performed when the resistance exercise bout is conducted with 30 or 90 s Methods: Twenty-seven healthy sedentary men (18À20 years old) volunteered to participate in this study and were divided into two groups: 30RI (n ¼ 16) or 90RI (n ¼ 11), based on the RI length of 30 or 90 s between the sets of a resistance exercise protocol. The one repetition maximum (1RM) assessment of the elbow flexion was carried out and then a resistance exercise protocol which constituted five sets of biceps curl at 85% of 1RM with 30-s Correspondence to: . Downloaded from www.worldscientific.com by MONASH UNIVERSITY on 08/25/15. For personal use only.(30RI group) or 90-s (90RI group) RI length between sets was performed. Each bout was performed to voluntary fatigue and the number of repetitions and workout volume completed were calculated. Subjects provided blood samples prior to resistance exercise, and at 48 and 96 h following exercise to evaluate serum CK activity. The inter-individual serum CK activity along the 96 h after exercise was analyzed. Results: The results demonstrated that the longer RIs provided greater workout volume as expected, but there were no differences in serum CK activity between the groups. Additionally, it was possible to identify two high responder subjects, one from each RI group, who showed a great interindividual serum CK activity variability. Conclusion: Exercising with short RIs does not appear to present any additional muscle microtrauma to untrained subjects. Further studies are necessary to evaluate if the inter-individual variability of the serum CK activity is influenced by the inter-set RI length.

The acute effect of static stretching between sets on the number of repetitions performance in resistance training

“…Resting interval variable between sets is the important for multiple set exercises. Previous studies reported effects of different duration and activities in rest interval between sets on performance (Arazi et al, 2015;Blazquez et al, 2013;Evangelista et al, 2011;García-López et al, 2007;García-López et al, 2010;Hill-Haas et al, 2007;Miranda et al, 2007;Nasiri et al, 2011;Rahimi, 2005;Ramírez-Campillo et al, 2014;Ratamess et al, 2007;Richmond and Godard, 2004;Rodrigues et al, 2010;Senna et al, 2009;Silva et al, 2010;Souza et al, 2013;Willardson and Burkett, 2005;Willardson and Burkett, 2006a;Willardson and Burkett, 2006b;Willardson and Burkett, 2008). Some studies showed hormonal responses on different rest durations between sets (Ahtiainen et al, 2005;Boroujerdi and Rahimi, 2008;Bottaro et al, 2009;Buresh et al, 2009;Rahimi et al, 2010).…”

Differences in Lift Quality During the Barbell Back Squat When Using Perceived Recovery Status–Regulated Intrasession Recovery Compared With Standardized Recovery Intervals

“…The current literature highlights vague recommendations for resistance training recovery prescriptions, and clinical tools used to assess fatigue seem to be cumbersome, time-consuming, invasive, and impractical because of compliance issues (4,13,14,33). In addition, these prescriptions do not consider the heterogeneity in recovery patterns between individuals (21,30). Therefore, a simplified individualized rest procedure that yields similar performance results necessitates the examination of practical application.…”