OPTIMAL LOADING FOR LOWER BODY
University of Wales Institute Cardiff
MetadataShow full item record
Muscular power during explosive activity can be enhanced when preceded by muscle contractions. These contractions would have different effects on explosive activity if performed at different intensities. The purpose of this study was to find an optimal intensity that would increase PAP in the lower limbs. Ten male participants (mean ± SD; age 20.0 ± 0.7 years, height 180.6 ± 6.7 cm, mass 83.3 ± 8.2 kg) performed a countermovement jump (CMJ) prior to and following a conditioning contraction (CC). The CC’s were either 65, 75, 85 or 95% of one repetition maximum (1RM), performed on separate days in a counterbalanced randomised order. A 5-min rest period was given between the CC and experimental CMJ. Displacement (Dmax), peak power (Pmax), peak force (Fmax), rate of force development (RFD), maximum velocity (Vmax) and electromyography (EMG) of the rectus femoris and vastus medialis were collected during each CMJ. Results showed a significant increase in Pmax after 85% of 1RM (3331 ± 558 and 3713 ± 505 W for pre- and post-CMJ, respectively; p < 0.05) and 95% of 1RM (3616 ± 655 and 3989 ± 672 W for pre- and post-CMJ, respectively; p < 0.05). No significant differences in Pmax were found for 65 and 75% of 1RM (p > 0.05). Also no significant differences were revealed in Dmax, Fmax, RFD and Vmax for 65, 75, 85 and 95% of 1RM (p > 0.05). EMG was not found to be significantly different after any of the CC’s (p > 0.05). It was concluded that heavier bouts of exercise (> 80% of 1RM) were adequate for enhancing explosive performances.
Showing items related by title, author, subject and abstract.
Johnson, Hannah (Cardiff Metropolitan University, 2015)Javelin throwing has been well researched over recent years, however only limited research has investigated gender comparison within the event and even less has been conducted on the sub-elite athletic population. Information ...
Analysis of technical abilities of successful and unsuccessful soccer teams competing in the European Championships Portugal 2004 Williams, Jeremy (University of Wales Institute Cardiff, 2006)Although soccer has received a major share of the research by notational analysts over the last five decades (Pearce and Hughes, 2001) not much analysis has been completed on technical abilities in this area of soccer. ...
An investigation into the differences between right and left handed batsmen in international one-day cricket Jones, Daniel Owen (University of Wales Institute Cardiff, 2006)This study has investigated whether there are differences between right and left handed batsmen in international one-day cricket. Using a hand notation system, performance profiles were created for right and left handed ...