Electromyographic, kinetic and performance analysis of complex training for the lower body
University of Wales Institute Cardiff
MetadataShow full item record
Complex training is becoming an increasingly popular training method of combining weights and plyometrics in the same session, despite limited research into its efficacy. The purpose of this study was to evaluate the effect of a set off high load squats on the performance of a subsequent set of drop jumps via electromyography (EMG) of the bicep femoris and rectus femoris, peak ground reaction force (GRF) and jump height. The research hypothesis states that all dependant variables (DVs) will be significantly increased following the squats. Three male (age 21.7 + 2.9 years; weight, 75 + 2.8kg) and three female (age 19 + 1 years; weight 56.6 + 2.4kg) national and international jump athletes, with experience in weights and plyometrics volunteered to perform plyometric drop jumps under two conditions. One condition required them to perform 5 drop jumps following a normal warm up. The other condition required them to perform 5 back squats at 80% of their 1RM before the 5 drop jumps, with a 3 minute intra complex rest. Data was collected during the drop jumps in both conditions. Results indicated that there was no significant difference in the average EMG (AEMG) of the bicep femoris and the AEMG of the rectus femoris was actually significantly lower following the squats. This is contrary to some literature and to the complex training theory as it suggests that there is no heightened excitability of the central nervous system. Despite this the peak GRF and jump height were both significantly increased in the squat condition suggesting that some other mechanism is, at least partly, responsible for augmented performance following weights. Therefore, complex training may have enhanced long term training effects but the short term adaptations responsible for this are still up for debate.
Showing items related by title, author, subject and abstract.
The acute effects of heavy-load squats on verticle jump height and neuromuscular activation characteristics in the thigh during a counter-movement jump Tillin, Neale (Cardiff Metropolitan University, 2004)The purpose of the current study was to validate the complex training theory. The study aims to investigate the effects of a set of 6 repetition maximum (6RM) halÊ squats on neuromuscular activation characteristics in ...
Knight, Joel (Cardiff Metropolitan University, 2013)Knight, JW. The effect of different squat depth on the Post Activation Potentiation response during 40m sprint performance. Previous studies have suggested that post-activation potentiation can have a positive effect in ...
Acute effect of different types of upper body maximal conditioning contractions on postactivation potentiation Keenan, Matthew (University of Wales Institute Cardiff, 2009)The purpose of the current study was to validate the use of prior high resistance exercise (HRE) on subsequent muscular power exercises improvement. The study aims to examine the postactivation potentiation (PAP) effect ...