PHYSIOLOGIC EFFECTS ON ADULT MEN OF CIRCUIT STRENGTH TRAINING AND JOGGING

  • 1 January 1979
    • journal article
    • research article
    • Vol. 60  (3) , 115-120
Abstract
The effects of 8 wk of circuit strength training (CST) followed by 8 wk of jogging and then 8 wk, of CST or jogging were studied. During the final 8 wk, the subjects were randomly assigned to either CST or jogging groups. The subjects (n = 16, .hivin.x age = 29 yr) exercised 3 days/wk. The strength training involved 2 circuits of reciprocal exercises using isokinetic devices with 10-15 repetitions/set and 30 s of rest between sets. The subjects jogged 3 miles/day during the jogging program. After the initial 8 wk of CST, significant changes were found in treadmill performance time, maximum O2 uptake (.ovrhdot.VO2 max), maximum pulmonary ventilation (.ovrhdot.VE max), body fat, total skinfold fat, fat weight, lean weight, isotonic bench and leg press, and isokinetic slow speed, fast speed and power endurance measures. The jogging program elicited significantly greater changes in treadmill performance time and .ovrhdot.VO2 max. Further reductions were found in total skinfolds and waist girth during the jogging program. Leg strength was maintained during jogging but upper body strength was reduced significantly. Physiologic levels were maintained during the final 8 wk and showed no differences between the CST and jogging groups.