Effects of 8 weeks strength training on vertical jump performance in elite male volleyball players during the in-season [Póster]

METHODS Nine p o essional male olleyball playe s ook pa in his s udy. The neu omuscula pe o mance was es ima ed by unloaded (CMJ) and loaded coun e mo emen jumps (CMJloaded) heigh (cm); and by eloci y o displacemen in he concen ic phase o ull squa (FS) (m•s-1). T aining ook place 2 d•wk-1 du ing 8 weeks (16 sessions) ( able 1). The esis ance exe cises we e FS, hang powe clean and loaded jump. In FS, 2-3 se ies o 4-6 epe i ions we e ealized wi h a load which was g adually inc eased om 50% o 65% o 1RM. In powe clean, 3 se ies o 4-6 epe i ions we e ealized wi h he maximum load ha allows a co ec echnical execu ion. In loaded jump, 2-3 se ies o 4-5 epe i ions we e ealized wi h a load which was g adually inc eased om 50% o 80% acco ding o he weigh wi h which he a hle es eached a heigh o abou 20 cm. RESULTS The e was a signi ican inc ease in CMJ and CMJloaded (3.4% and 5.8%; p<0.05; espec i ely). No signi ican changes we e obse ed in FS (0.14%; p>0.05). PRACTICAL APPLICATIONS o CONCLUSION  Ou esul s sugges ha he use o mode a e loads could p oduce simila esul s on e ical jump pe o mance o he use o high loads, since in ou s udy a load equi alen o 60% 1RM in he FS was no exceeded and jumping exe cises we e pe o med wi h ligh loads.  These esul s indica e ha he speci ici y o aining, which in his case is exp essed by he p oximi y o he eloci ies o execu ion o he aining exe cises o he eloci y o execu ion o he e ical jump, is de e minan o he pe o mance. REFERENCES 1. Ma ques MC, González-Badillo JJ, and Kluka D. In-season s eng h aining male p o essional olleyball a hle es. S eng h Cond J 2006; 28: 6-12. 2. Ma ques MC, Van Den Tillaa R, Vesco i JD, e al. Changes in s eng h and powe pe o mance in eli e senio emale p o essional olleyball playe s du ing he in-season: a case s udy. J S eng h Cond Res 2008; 22 (4):1147-55. 3. Häkkinen K. Changes in physical i ness p o ile in emale olleyball playe s du ing he compe i i e season. J Spo s Med Phys Fi ness 1993; 33: 223-232. INTRODUCTION I has been sugges ed ha o imp o e he e ical jump pe o mance, olleyball playe s mus comple e speci ic olleyball esis ance aining (1); howe e , ew da a a e a ailable abou p o essional male olleyball playe s. The pu pose o his case epo is o examine he e ec s o 8 weeks o combined s eng h and jump exe cises aining on he e ical jump abili y in a g oup o senio eli e male olleyball playe s du ing he compe i ion season. E ec s o 8 weeks s eng h aining on e ical jump pe o mance in eli e male olleyball playe s du ing he in-season. Ga cía Asencio C.1, Sánchez Mo eno M.1, González-Badillo JJ.1 1 Spo aining labo a o y, Facul y o Spo Science, Uni e si y Pablo de Ola ide, Se ille, Spain. Table 1. Resis ance aining p og am employed. Exe cises Weeks Full Squa Loaded Jump Powe Clean 1 2x6 / 3x6 (1m*s-1-16 %) 2x5 / 3x5 (50%) 3x6 2 2x5 / 3x5 (1m*s-1-8 %) 2x5 / 3x5 (60%) 3x6 3 3x6** (1m*s-1-8 %) 3x5** (60%) 3x5 4 3x4 / 3x5 (1m*s-1) 3x4 / 3x5 (70%) 3x5 5 3x6** (1m*s-1) 3x5** (70%) 3x5 6 2x4 / 3x4 (1m*s-1+8 %) 2x4 / 3x4 (80%) 3x4 7 3x4** (1m*s-1+8 %) 3x4** (80%) 3x4 8 3x4** (1m*s-1+8 %) 3x4** (80%) 3x4 m*s-1 = eloci y o displacemen in he concen ic phase o FS (1m*s-1 ≈ 60%1RM). Loaded jump: % weigh wi h which he a hle es eached a heigh o abou 20 cm. Powe clean: maximum load ha allows a co ec echnical execu ion DISCUSSION The main aim o ou s udy was o e alua e he e ec o s eng h aining on jumping abili y du ing he compe i ion phase in p o essional olleyball playe s. The esul s o ou s udy showed a signi ican imp o emen in e ical jump abili y a e 8-wk aining pe iod. Resul s simila o ou s we e obse ed by Ma ques e al., (2) a e 12-wk esis ance aining wi h aining loads anging om 50 o 75% o 1RM, and by Häkkinen (3) a e 10-wk aining pe iod (loads>75% 1RM), in compe i i e phase (3.8% and 4.5%, espec i ely). View publica ion s a sView publica ion s a s