Author : Michael Christopher Zourdos
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (859 download)
Book Synopsis Physiological Responses to Two Different Models of Daily Undulating Periodization in Trained Powerlifters by : Michael Christopher Zourdos
Download or read book Physiological Responses to Two Different Models of Daily Undulating Periodization in Trained Powerlifters written by Michael Christopher Zourdos and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT: Periodization refers to systematic variations to exercise intensity and volume across an entire training program in efforts to optimize performance for competition. Although multiple periodization models exist, linear periodization (LP), which does not encompass as many manipulations of volume and intensity as daily undulating periodization (DUP), has been prominently utilized in practical settings. However, DUP has recently shown promise as an effective resistance-training paradigm with respect to positive neuromuscular adaptations and performance gains. In contrast to LP, DUP is characterized by frequent, session-to-session alterations to volume and intensity across a complete training period. Previous research has demonstrated the efficacy of DUP in significantly increasing muscular strength, i.e. one-repetition maximum (1RM), to a greater extent than LP. Nevertheless, further investigation is necessary to improve the systematic programming of the DUP training model. Therefore, the primary aim of the present study was to examine the effects of two divergent DUP models (modified versus traditional) on maximum strength adaptations and total exercise volume in trained powerlifters. Furthermore, we investigated the temporal profile of anabolic and catabolic hormone responses across the DUP training protocols. Eighteen male, college-aged powerlifters (body weight: 82.55 ± 11.39 kg.) participated in this study and were assigned to one of two groups. Subjects underwent either: 1) traditional DUP training which employed a weekly training order of hypertrophy, strength, and power (HSP) or 2) modified DUP training which implemented a hypertrophy, power, and strength (HPS) training order for each week. The study spanned a total of eight weeks with each group assessed for pre-training 1RM during the first week, followed by 6 weeks of DUP training, and subsequent testing for post-training 1RM. Subjects specifically performed powerlifting exercises (squat, bench press, and deadlift) on testing and training days. During hypertrophy and power training sessions, subjects performed a fixed number of sets and repetitions, which progressed weekly. However, during strength training sessions, subjects were instructed to perform repetitions until volitional failure at a given percentage in order to measure total volume (TV) of exercise performed. Additionally, blood was collected 30 minutes prior to the strength training sessions each week to examine alterations in hormonal markers, testosterone and cortisol, in response to the DUP training protocols. Hormonal analysis was conducted using enzyme linked immunosorbent (ELISA) assay. For 1RM squat there was a main time effect (p0.05); however, no difference existed between increases for HSP (+7.93%) and HPS (+10.48%). Regarding bench press, only HPS significantly increased 1RM by 8.13%, while HSP failed to exhibit significant improvements over the course of the study. There was a main time effect (p0.05) for 1RM deadlift (HSP: +6.70%, HPS: +7.57%) and powerlifting total (HSP: 6.70%, HPS: +8.66%), but no difference existed between groups for either variable. Total Volume in HPS was significantly greater (p
