Body Weight, Diet, Healthy
Conditions
Keywords
ketogenic diet, body builders, athletes, body composition, hormones
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.
Interventions
OTHERKetogenic Diet
KD group consumed less than 50g/day of carbohydrates
OTHERNormal Diet
ND group consumed 55% of the caloric intake from carbohydrates
Sponsors
University of Padova
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
BASIC_SCIENCE
Masking
SINGLE (Outcomes Assessor)
Masking description
Outcome assessor treated anonymus data
Eligibility
Sex/Gender
MALE
Age
20 Years to 40 Years
Healthy volunteers
Yes
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
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Fat Mass | 8 weeks | fat mass measured through body impedence analyser |
| Lean Body Mass | 8 weeks | lean body mass mass measured through body impedence analyser |
| Maximal muscle strength | 8 weeks | muscle strength measured via 1-RM test |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| blood glucose | 8 weeks | glucose as milligram per deciliter |
| resting metabolism | 8 weeks | resting energy expenditure measured as Kcal / day |
| testosterone | 8 weeks | Testosterone free as picogram per milliliter |
| inflammatory cytokines | 8 weeks | IL6, IL1β, TNFα measured as nanogram per deciliter |
Countries
Italy
Outcome results
None listed