Effects of Ketogenic Diet in Body Builders

Not Applicable

Completed

• Conditions: Body Weight; Diet, Healthy
• Interventions: Other: Normal Diet; Other: Ketogenic Diet

• Registration Number: NCT04629365
• Lead Sponsor: University of Padova

Brief Summary

the study sought to investigate the influence of 8 weeks of a very low carbohydrate ketogenic diet on body composition, muscle strength, muscle area and blood parameters in competitive natural body builders.

Detailed Description

nineteen natural body builders were randomly assigned to a ketogenic diet (KD) group or to a normal diet group (ND) with a traditional meal pattern. The two diets were isocaloric and included the same amount of protein per kg of body weight; but differed in the distribution of fats and carbohydrates; the latter were kept below 5% daily (less than 50g/day) in the KD group while represented 55% of the caloric intake in the WD group During the experimental period, training loads were similar in the two groups. Athletes were tested before and after 8 weeks of the intervention. Body composition , basal metabolism, muscle strength and blood parameters were measured.

Study Timeline

• Study Start: 2020-01-01
• Primary Completion: 2020-08-31
• Study Completion: 2020-10-31
• Status Verified: 2020-11
• Study First Submitted: 2020-11-09
• Study First Submitted QC: 2020-11-09
• Last Update Submitted: 2020-11-13
• Study First Posted: 2020-11-16
• Last Update Posted: 2020-11-17

Recruitment & Eligibility

• Status: COMPLETED
• Sex: Male
• Target Recruitment: 19

Inclusion Criteria

• at least 5 years of training experiences
• competing in recognized body building category

Exclusion Criteria

• adherence to special diets
• use of nutritional supplements (except a daily multivitamin-mineral and/or protein supplement)
• use of medications (steroids)
• diabetes or metabolic diseases

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Normal Diet	Normal Diet	ND group consumed 55% of the caloric intake from carbohydrates
Ketogenic Diet	Ketogenic Diet	KD group consumed less than 50g/day of carbohydrates

Primary Outcome Measures

Name	Time	Method
Lean Body Mass	8 weeks	lean body mass mass measured through body impedence analyser
Fat Mass	8 weeks	fat mass measured through body impedence analyser
Maximal muscle strength	8 weeks	muscle strength measured via 1-RM test

Secondary Outcome Measures

Name	Time	Method
blood glucose	8 weeks	glucose as milligram per deciliter
inflammatory cytokines	8 weeks	IL6, IL1β, TNFα measured as nanogram per deciliter
resting metabolism	8 weeks	resting energy expenditure measured as Kcal / day
testosterone	8 weeks	Testosterone free as picogram per milliliter

Trial Locations

Locations (1)

Nutrition and Exercise Lab, DSB, University of Padova; 🇮🇹 Padova, Italy