Showing papers on "Interval training published in 1987"

Effect of training on the rating of perceived exertion at the ventilatory threshold.

Abstract: The purpose of this study was to determine the effect of training on the rating of perceived exertion (RPE) at the ventilatory threshold. College students were assigned to either training (n = 17) or control (n = 10) groups. Trainers completed 18 interval training sessions (five X 5 min cycling at 90-100% VO2max) and 8 continuous training sessions (40 min running or cycling) in 6 weeks. Pre- and post-training, cardiorespiratory, metabolic, and perceptual variables were measured at the ventilatory threshold during graded exercise tests on a cycle ergometer. Ventilatory threshold was that point above which VE X VO2-1 increased abruptly relative to work rate. Post-training means of trained and control subjects were compared using analysis of covariance, with pre-training values as covariates. Following training, the adjusted means for the trained subjects were significantly greater (p less than 0.05) than for controls for VO2max (6%), and for work rate (20%), VO2 (23%), and %VO2max (13%) at the ventilatory threshold. However, adjusted means for RPE at the ventilatory threshold were not significantly different (2%). Both before and after training, exercise at the ventilatory threshold was perceived as 'somewhat hard' to 'hard' (RPE = 13-15) by both groups. The relationship between RPE and %VO2max was altered by training, with trained subjects having a lower RPE at a given %VO2max. It is concluded that RPE at the ventilatory threshold is not affected by training, despite that after training the ventilatory threshold occurs at a higher work rate and is associated with higher absolute and relative metabolic and cardiorespiratory demands.

The Effects of Various Physical Training Programs on Short Duration, High Intensity Load Bearing Performance and the Army Physical Fitness Test

Abstract: : The purpose of this study was to contrast the effects of different physical training programs on short duration, high intensity load bearing performance and Army Physical Fitness Test (APFT) scores. Thirty-five soldiers were randomly assigned to one of four training groups: Group A, upper and lower body resistance training and high intensity endurance training (HEIT) which included interval training; Group B, upper body resistance training and HEIT; Group C, upper and lower body resistance training only; Group D, HEIT only. Training took place four times per week (M,T,Th,F) for 12 weeks. Pre- and post- training measures were obtained for a two mile load bearing task with a total load of 44.67 kgs. APFT was administered at the pre-, mid-, and post-training time points. The results demonstrate that only Group A and Group B made significant (p<0.05) improvements in the load bearing performance task. Groups A, B, and D improved all components of their APFT scores while Group C improved in push ups and sit ups only. The results of this study suggest that a combination of running and resistance training in necessary to improve short duration, high intensity load bearing performance. Keywords: Load bearing, Physical training, Physical performance, Muscle strength, Aerobic capacity, Exercise, Performance(Human).