Abstract

Many bodybuilders use anabolic androgenic steroids (AAS) to potentiate muscle mass gain as a result of specific resistance training and nutrition. The case we describe hereafter outlines alterations in body composition of an amateur bodybuilder during his pre-competitive period (11 weeks). The Participant was a 28-year old Caucasian male who was aiming to participate in his first bodybuilding competition under the “Men’s Physique” category. The Participant self-administered AAS for the whole pre-competitive period, followed a 13 set-meal plan consisting of 10 daily meals interspersed by approximately 2 h, and performed six high-volume resistance-training sessions a week. Body mass and anthropometric variables were measured at the beginning, during and at the end of his pre-competitive period. Dietetic analysis revealed a reduction in protein intake at the 10th (% decrease: −51.3%) and 11th weeks (% decrease: −64.5%) and in calorie intake at the 10th (% decrease: −57.9%) and 11th weeks (% decrease: −59.5%) in comparison to the 1st week. As a result, the Participant reduced both total body mass and fat percentage. However, there was a reduction in absolute fat free mass, despite the use of AAS. Apparently, the combination of excessive volumes of training with inadequate protein consumption was responsible for this outcome.

Highlights

  • Bodybuilding is a sport aimed at increasing muscle mass and decreasing body fat percentage [1]

  • We report the practices adopted and the changes in body composition of an amateur bodybuilder during the pre-competitive period, and make a critical analysis of the current practices adopted based on scientific evidence, offering alternatives for people involved or willing to be involved in bodybuilding

  • anabolic androgenic steroids (AAS): anabolic-androgenic steroids, ΣSF: sum of all skinfolds, BF%: percentage of body fat, BM: body mass, Body mass index (BMI): body mass index, FFM: fat-free mass, FFM%: fat free mass percentage. * The fat-free mass was estimated based on the percentage of body fat

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Summary

Introduction

Bodybuilding is a sport aimed at increasing muscle mass and decreasing body fat percentage [1]. These changes in body composition occur due to an association of resistance and aerobic training with a strict nutritional diet [1]. The pre-competitive phase is mainly characterized by an increased volume of aerobic exercise, caloric restriction and dehydration in order to potentiate muscle definition [4]. Together, these phases are responsible for substantial changes in the bodybuilder’s body composition. We report the practices adopted and the changes in body composition of an amateur bodybuilder during the pre-competitive period, and make a critical analysis of the current practices adopted based on scientific evidence, offering alternatives for people involved or willing to be involved in bodybuilding

The Participant
Nutritional Advice
Resistance Training Protocol
Anthropometric Measurements
Findings
Discussion
Conclusions

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