Document Type : Research Paper I Open Access I Released under CC BY 4.0 license


1 Assistant Professor, Department of Physical Education and Sport Sciences, Faculty of Humanities, Lorestan University, Khorramabad, Iran

2 MSc. Student Exercise Physiology, Faculty of Humanities, Lorestan University, Khorramabad, Iran

3 . Associate Professor, Department of Physical Education and Sport Sciences, Faculty of Humanities, Tarbiat Modares University, Tehran, Iran

4 PhD Student of Exercise Physiology, Alborz Campus of University of Tehran, Alborz, Iran


Researchers and coaches are constantly looking for the most effective ways to enhance athletic performance. The aim of this study was to investigate the response of strength, power and muscle endurance to resistance training with different rest intervals. 16 male volunteers were selected and divided randomly into two groups. Group A (n=8, age 22±2.55 yr, height 174.20±6.14 cm, weight 64.20±6.33 kg) performed resistance training with constant rest intervals (120 sec.) and group B (n=8, age 22±3.54 yr, height 176.40±6.50 cm, weight 64.60±6.38 kg) with incremental rest intervals (90, 120, 150 sec.) 3 days per week for 6 weeks. To determine strength, power and muscle endurance, 1RM, bench press, throwing medicine ball and maximum repetition of bench press with 30% of 1RM tests were used respectively. Blood samples were collected 3 minutes before and 2 minutes after the 17th session to measure blood lactate. Paired samples and independent samples t tests were used for data analysis (α<0.05). Results showed that strength, power and muscle endurance significantly increased in both groups (P<0.05), but group B showed a greater percentage change in all tests. Blood lactate significantly increased after the resistance training compared with the rest interval but this increase was less in group B. It can be concluded that resistance training with progressive rest intervals is more important for increasing strength, power and muscle endurance compared with constant rest intervals.


1-      American College of Sports Medicine Position Stand. (2009). “Progression models in resistance training for healthy adults”. Medicine and Science in Sports and Exercise, Vol.41, No.3, PP:687-708.
2-      Binkley, H.M. (2001). “Strength, size, or power”. NSCA’s Performance Training Journal, Vol.1, No.4, PP:14-18.
3-      Douris, P.C., Borukhov, L., Espinoza, J., Klien, J., Levane, K., Li, T., et al. (2012). “Phototherapy and grip muscle performance”. Novel Physiotherapies, Vol. 2, No.5, PP:1-5.
4-      Faigenbaum, A.D., Westcott, W.L., LaRosa, L.R., Long, C. (1999). “The effects of different resistance training protocols on muscular strength and endurance development in children”. Pediatrics, Vol.104, No.1, PP:1-7.
5-      Faulkinbury, J.K., Stieg, J.L., Tran, T.T., Brown, L.E., Coburn, J.W., Judelson, D.A. (2011). “Effects of depth jump vs. box jump warm-ups on vertical jump in collegiate vs. club female volleyball players”. Medicine Sport, Vol.15, No. 3, PP:103-106.
6-      Garcia-Lopez, D., Paz, J.A.D., Moneo, E., Jimenez-Jimenez, R., Bresciani, G., Izquierdo, M. (2007). “Effects of short vs. long rest period between sets on elbow-flexor muscular endurance during resistance training to failure”. J. Strength Cond. Res, Vol.21, No.4, PP:1320–1324.
7-      Goessler, K.F., Polito, M.D. (2013). “Effect of fixed and self-suggested rest intervals between sets of resistance exercise on postexercise cardiovascular behavior”. Brazilian journal of kinanthropometry and human performance, Vol.15, No.4, PP:467-475.
8-      Grandys, M., Majerczak, J., Duda, K., Zapart-Bukowska, J., Sztefko, K., Zoladz, J.A. (2008). “The effect of endurance training on muscle strength in young, healthy men in relation to hormonal status”. Journal of physiology and pharmacology, Vol.59, No. 7, PP:89-103.
9-      Hill-Haas, S., Bishop, D., Dawson, B., Goodman, C., Edge, J. (2007). “Effects of rest interval during high-repetition resistance training on strength, aerobic fitness, and repeated-sprint ability”. Journal of Sports Sciences, Vol.25, No.6, PP:619 – 628.
10-  Kisner, C., Colby, L.A. (2007). “Therapeutic exercise: Foundations and techniques”. F. A. Davis Company, fifth edition, PP: 148-185.
11-  Kraemer, W.J., Rattamess, N.A. (2004). “Fundamentals of resistance training: progression and exercise prescription”. Medicine and science in sports and exercise, Vol.36, PP: 674–688.
12-  Kraemer, W.J., Spiering, B.A. (2006). “Skeletal muscle physiology: Plasticity and responses to exercise”. Hormone Research, Vol.66, No.1, PP: 2–16.
13-  Kraemer, W.J., Ratamess, N.A., French, D.N. (2002). “Resistance training for health and performance”. Current Sports Medicine Reports, Vol.1, PP:165–171.
14-  Lamas, L., Aoki, M.S., Ugrinowitsch, C., Campos, G. E. R., Regazzini, M., Moriscot, A. S., et al. (2009). “Expression of genes related to muscle plasticity after strength and power training regimens”. Scand J Med Sci Sports, PP:1-10.
15-  Miranda, H., Simao, R., Marmo, M.L., Souza, R.A.d., Souza, J.A.A.D., Salles, B.F.D., et al. (2009). “Effect of rest interval length on the volume completed during upper body resistance exercise”. Journal of Sports Science and Medicine, Vol.8, PP:388-392.
16-  Rattamess, N.A., Chiarello, C.M., Sacco, A.J., Hoffman, J.R., Faigenbaum, A.D., Ross, R.E., et al. (2012). “The effects of rest interval length on acute bench press performance: the influence of gender and muscle strength”. Journal of Strength and Conditioning Research, Vol. 26, No.7, PP:1817–1826.
17-  Rhea, M.R., Kenn, J.G., Dermody, B.M. (2009). “Alterations in speed of squat movement and the use of accommodated resistance among college athletes training for power”. Journal of Strength and Conditioning Research, Vol.23, No.9, PP:2645–2650.
18-  Robinson, J.M., Stone, M.H., Johnson, R.L. (1995). “Effects of different weight training exercise/rest intervals on strength, power, and high intensity exercise endurance”. Journal of Strength and Conditioning Research, Vol.9, No.4, PP: 216–221.
19-  Salles, B.F.D., Simao, R., Miranda, F., Novaes, J.d.S., Lemos, A., Willardson, J.M. (2009). “Rest Interval between Sets in Strength Training”. Sports Med, Vol.39, No.9, PP: 765-777.
20-  Senna, G., Salles, B.F., Prestes, J., Mello, R.A., Simao, R. (2009). “Influence of two different rest interval lengths in resistance training sessions for upper and lower body”. Journal of Sports Science and Medicine, Vol.8, PP:197-202.
21-  Smilios, I., Sotiropoulos, K., Christou. M., Douda, H., Spaias, A., Tokmakidis, S.P. (2013). “Maximum power training load determination and its effects on load-power relationship, maximum strength, and vertical jump performance”. J Strength Cond Res, Vol.27, No.5, PP:1223–1233.
22-  Souza-Junior, T.P., Willardson, J.M., Bloomer, R., Leite, R.D., Fleck, S.J., Oliveira, P.R. et al. (2011). “Strength and hypertrophy responses to constant and decreasing rest intervals in trained men using creatine supplementation”. Journal of the International Society of Sports Nutrition, Vol.8, No.17, PP:1-11.
23-  Trabelsi, K., Stannard, S.R., Ghlissi, Z., Maughan, R.J., Kallel, C., Jamoussi, K., et al. (2013). “Effect of fed- versus fasted state resistance training during Ramadan on body composition and selected metabolic parameters in bodybuilders”. Journal of the International Society of Sports Nutrition, Vol.10, No.23, PP:1-11.
24-  Vossen, J.F., Kramer, J.F., Burke, D.G., Vossen, D.P. (2000). “Comparison of dynamic push-up training and plyometric push-up training on upper-body power and strength”. Journal of Strength and Conditioning Research, Vol.14, No.3, PP:248–253.
25-  Willardson, J.M. (2006). “A brief review: factors affecting the length of the rest interval between resistance exercise sets”. Journal of Strength and Conditioning Research, Vol.20, No.4, PP:978–984.
26-  Wilson, J.M., Joy, J.M., Lowery, R.P., Roberts, M.D., Lockwood, C.M., Manninen, A.H., et al. (2013). “Effects of oral adenosine-5′-triphosphate supplementation on athletic performance, skeletal muscle hypertrophy and recovery in resistance-trained men”. Nutrition & Metabolism, Vol.10, No.57, PP:1-11.
27-  Winett, R.A., Carpinelli, R.N. (2001). “Potential health-related benefits of resistance training”. Preventive Medicine, Vol.33, PP:503–513.
28-  Young, W.B. (2006). “Transfer of strength and power training to sports performance”. International Journal of Sports Physiology and Performance, Vol.1, PP:74-83.
29-  Zajac, A., Waskiewicz, Z., Pilis, W. (2001). “Anaerobic power, creatine kinase activity, lactate concentration, and acid-base equilibrium changes following bouts of exhaustive strength exercises”. Journal of Strength and Conditioning Research, Vol.15, No.3, PP:357–361.