Authors: Mikel Izquierdo Keijo Häkkinen Javier Ibáñez William J Kraemer Esteban M Gorostiaga
Publish Date: 2004/12/23
Volume: 94, Issue: 1-2, Pages: 70-75
Abstract
The effects of a 16week training period 2 days per week of resistance training alone upper and lowerbody extremity exercises S endurance training alone cycling exercise E or combined resistance once weekly and endurance once weekly training SE on muscle mass maximal strength 1RM and power of the leg and arm extensor muscles maximal workload Wmax and submaximal blood lactate accumulation by using an incremental cycling test were examined in middleaged men S n=11 43 2 years E n=10 42 2 years SE n=10 41 3 years During the early phase of training from week 0 to week 8 the increase 1RM leg strength was similar in both S 22 and SE 24 groups while the increase at week 16 in S 45 was larger P005 than that recorded in SE 37 During the 16week training period the increases in power of the leg extensors at 30 and 45 of 1RM were similar in all groups tested However the increases in leg power at the loads of 60 and 70 of 1RM at week 16 in S and SE were larger P005 than those recorded in E and the increase in power of the arm extensors was larger P005 in S than in SE P005 and E ns No significant differences were observed in the magnitude of the increases in Wmax between E 14 SE 12 and E 10 during the 16week training period During the last 8 weeks of training the increases in Wmax in E and SE were greater P005–001 than that observed in S ns No significant differences between the groups were observed in the traininginduced changes in submaximal blood lactate accumulation Significant decreases P005–001 in average heart rate were observed after 16 weeks of training in 150 W and 180 W in SE and E whereas no changes were recorded in S The data indicate that lowfrequency combined training of the leg extensors in previously untrained middleaged men results in a lower maximal leg strength development only after prolonged training but does not necessarily affect the development of leg muscle power and cardiovascular fitness recorded in the cycling test when compared with either mode of training alone
Keywords: