Program

CO52-006

Oral Communication

Influence of recovery time on strength during an isokinetic testing protocol of knee

Dr Pierre Louis BERNARDa, Dr Guillaume TALLONa, Prof Hubert BLAINb, Mr Francis DEGACHEc

a M2H Euromov. université Montpellier, b M2H Euromov. université Montpellier, Department of Internal Medecine and Geriatrics. Antonin Balmes Center. University, c Institute of Sport Sciences (ISSUL), Department of Physiology, Faculty of Biology and Medicine, University of Lausanne, Switzerland

Introduction: Previous studies have demonstrated that a one minute between set rest period was sufficient for recovery. The aim of the present study was to compare the influence of different rest intervals.

Methods: two sets of five isokinetic contractions of flexor-extensor knee muscles in a cohort composed of 14 men (32.5 years ± 8) with three counter-balanced rest intervals of 30, 60 and 180 seconds were proposed.

Results: The comparison of the isokinetic values measured during the first set of each evaluation session showed no significant differences (0.55<p<0.80). The analysis of the time and rest interval interaction demonstrated a systematic lack of significant difference between the isokinetic measures obtained after the counter-balanced rest intervals for peak torque of the quadriceps and of the hamstrings and for the mean power of the quadriceps and the hamstrings.

Discussion and conclusion: These findings raise questions about a strict energetic approach which focused on the rest interval needed for the resynthesis of phosphocreatine substrates mobilized during a maximal effort. So, future research should analyze the interaction of force production and fatigue phenomena in relation to the rest interval.

References

Bottaro M, Ernesto C, Celas R, Farinati PTV, Oliveira RJ. Effects of age and rest interval on strength recovery. Int J Sports Med. 2010; 31: 22-25.

Machado M, Koch AJ, Willardson JM., et al. Effect of varying rest intervals between sets of assistance exercises on creatine kinase and lactate dehydrogenase responses. J Strength Cond Res. 2011; 25 (5): 1339-1345.

Parcell AC, Sawyer RD, Tricoli VA, Chinevere TD. Minimum rest period for strength recovery during a common isokinetic testing protocol. Med Sci Sports Exerc. 2002; 34 (6): 1018-1022.

Keywords : recovery time, isokinetic, strength, knee.