Abstract
The aim of this randomized controlled study was to verify the impact of a 12-weeks
muscular endurance (ME) training of high repetitions (i. e., 15–30) with 2 different
periodization models on body composition, maximal strength, muscular endurance and
cardiorespiratory fitness. Twenty eight sedentary women aged 20–35 years were randomly
assigned to: control (CON) (n=8), linear periodization (LP) (n=10) and daily undulating
periodization (DUP) (n=10). LP and DUP models significantly improved body composition,
maximal strength and ME. However, no significant changes were detected for cardiorespiratory
fitness. LP showed a higher body fat loss ( − 12.73%) compared to DUP ( − 9.93%) (p=0.049), and systematically higher effect sizes (ES) when compared with DUP for maximal
strength and cardiorespiratory fitness parameters (e. g. ES=0.53 for ventilatory threshold).
In contrast, DUP exhibited a significantly (p=0.002) greater ME gain (129.43%) compared to LP (70.72%) in bench press, and greater
ES in all exercises. It may be suggested that LP performed with a high number of repetitions
may be considered an appropriate periodization model for untrained young women that
would likely lead to the improvement of body composition and maximum strength performance,
whereas DUP is more effective for the development of ME.
Key words
body composition - fitness - maximal oxygen consumption - ventilatory threshold -
repetitions maximum - muscular endurance