The purpose of this investigation was to examine the relationships between measures ofmaximal isometric force (peak force [PF]), rate of force development (RFD), vertical jump performance (VJ) and 1-repetition maximum (1RM) strength in recreationally trained men. The subjects in this study were 26 men ([mean ± SD]: age 22± 1 years; height 175 ± 7 cm; mass 90 ± 10 kg). They were tested for PF using the isometric midthigh pull exercise. The 1RM for the squat and bench press exercise were determined as a measure of dynamic strength. Explosive strength was measured as RFD from the isometric force-time curve. Correlations between the variables were calculated using Pearson product moment correlation coefficient. There was a nearly perfect correlation between measures of PF and 1RM squat (r = 0.97, p < 0.05) and 1RM bench press (r = 0.99, p < 0.05). The correlations were very strong between VJ and PF (r = 0.72, p < 0.05) and 1RM bench press (r = 0.70, p < 0.05). There were also strong correlations between VJ and 1RM squat (r = 0.69, p < 0.05). There were no significant correlations with RFD. The results showed that isometric maximum strength determined during the isometric midthigh pull test correlated well with 1RM and VJ testing. However, RFD measured during the same test did not appear to correlate as well with other measures. The isometric midthigh pull provides an efficient method for assessing strength in recreationally trained individuals. Practioners wishing to obtain performance data related to maximum strength may wish to consider isometric testing as a less time intensive method of testing.

Introduction: Sport scientist and strength coaches use resistance training to increase athletic performance and muscle hypertrophy. Improving muscular strength is the most essential task for these scientists, however, how best to identify weakness has yet to be established. The popularity of velocity-based resistance training has recently increased as a method to prescribe resistance training intensity, therefore, the purpose of the study was to identify the characteristics of bench press concentric velocity. It is hypothesized that the velocity output will decrease during the change from the 75% relative load of the 1RM to the 85% relative load of 1RM. It is believed that there will be a greater output of velocity during the 75% set than the 85% set. Methods: Nine female collegiate athletes (18-21 yrs), participated in this study. PUSH™ bands were used to measure barbell velocity during the bench press exercise. Each female was expected to preform 3 sets of 5 repetitions (3x5) at an intensity of 75% and 85% of their 1 repetition maximum (1RM). Only data from repetition 2-4 were used for analysis. Results: The results drawn from data collected supported our hypothesis showing a decrease in velocity among the 85% 1RM test when compared to the 75% 1RM test group. Comparisons were drawn using a t-Test table comprised of PUSH™ Band data. Conclusion: The results supported the hypothesis that this type of technology can identify the load specific velocity to help strength coaches to identify the optimal resistance for certain training program and goals by using collected data with the PUSH™ Band to identify weakness in strength and/or endurance.

Bakgrund: Effektutveckling kan sägas vara detsamma som muskulär explosivitet.Ju högre effekt, desto högre explosiv styrka, detta mäts i enheten Watt (W). Dennastyrkekvalitet har stor betydelse inom många idrotter. Inom styrketräning ansesbasövningarna, som även kallas “the big three”, utgöra grunderna för att med testermäta och på ett effektivt sätt träna både sin maximala och explosiva muskelstyrka.Syfte: Syftet med uppsatsen var att undersöka om effektutvecklingen skiljer sig åtinom intensitetzonen 30-60% av 1RM vid knäböj, bänkpress och marklyft. Metod:Elva styrketränande individer inkluderades i studien där deltagarna i snitt var 24 årgamla, 184 cm långa och vägde 84 kg. Deltagarna utförde ett testprotokoll sominkluderade ett test i knäböj, bänkpress och marklyft, där deltagaren själv skulleutföra tre repetitioner på bestämd vikt av deras 1RM mellan 30-60%. Resultat:Resultatet av den aktuella studien visar att det var en signifikant skillnad ieffektutveckling mellan övningen bänkpress och knäböj (p &lt;0.001) samt bänkpressoch marklyft (p &lt;0.001). Mellan övningarna knäböj och marklyft var det ingensignifikant skillnad (p &lt;0.748). Det var inte någon signifikant skillnad i deltagarnaseffektutveckling (W) mellan de olika procenten (30-60%) av deltagarnas 1RM iövningarna knäböj, bänkpress och marklyft (p&gt;0.05). Resultatet visar att en högreeffektutveckling kan uppnås i övningar som involverar stora delar av underkroppenjämfört med överkroppen. Det fanns ingen signifikant skillnad i maximaleffektutveckling (p&gt;0.05) vid belastningar i intervallet 30-60% av 1RM för knäböj,bänkpress och marklyft. Slutsats: Denna observation indikerar att valet avbelastning inte verkar ha någon betydelse för att uppnå maximal effektutveckling, sålänge vikten ligger inom intervallet 30-60% av 1RM. Detta är ny och betydelsefullkunskap som har direkt praktisk tillämpning för styrketränare och idrottare sominkluderar styrketräning i sitt träningsprogram för att förbättra explosiv styrka.