The present study investigates the effects of two types of loading patterns in resistance training. A double- pyramid loading pattern (DP) and a reverse step loading pattern (RS) were employed to study their effects on selected physiologic abilities of young wrestlers. For this purpose, 22 wrestlers volunteered to participate. Subjects (age 17.30± 2.42 years; height 170.41± 6.14 cm; weight 72.29±13 Kg; and BF% 12.39± 7.39) had a history of at least 6 months of wrestling training. The subjects were randomly divided into 3 groups; a control group (n=8), and two resistance training groups: a group using the DP loading pattern (n=7); and a group using the RS loading pattern (n=7). The subjects trained for 8 weeks using two selected loading patterns. In DP, subjects trained with 4/80%, 3/85%, 2/90%, 1/95%, 1/95%, 2/90%, 3/85%, 4/80%. In RS, subjects trained with 2/90%, 10/70%, 15/60%, 2/90%, 10/70%, 15/60%. To study the variables, the ANOVA test and Tukey's post-hoc test were used. The results of a 1RM strength test did not indicate any significant differences between the two training groups on upper and lower body muscles; however, this difference was significant for the control group (P ≥ 0.05). In a muscular endurance test for lower body muscles, the difference between all 3 groups was significant, and this significance was greatest for the RS group; however, the difference between the two training groups of DP and RS in the upper body was not significant (P ≥ 0.05). The results of muscular mass indicated that no significant difference existed between the training groups. However, the difference between two groups of training and the control group was significant (P ≤ 0.05). Studying the statistical test for "leg-power" indicated that no significant difference existed between the 3 groups; however, the difference between two groups of DP and RS was significant (P ≤ 0.05). In conclusion, it seems that both training models, were suitable for increasing strength, endurance, muscle mass and muscular power; and almost have similar benefit in physiologic factors of the athletes. However if the aim is increasing strength along with increasing muscular endurance, the RS model is more appropriate.

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