Resistance Training in the Fasted State

NCT ID: NCT05482750

Last Updated: 2023-05-09

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: NA
• Total Enrollment: 28 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2022-05-23
• Study Completion Date: 2022-12-23

Brief Summary

It is well evidenced in the literature that fasting aerobic exercise generates a series of metabolic differences when compared to exercise performed in the fed state, including the use of fats predominantly as an energy source. Consequently, increases in adaptations to aerobic training, related to health and physical performance, are observed when sessions are performed in the fasted state. In relation to resistance training, the evidence is limited. There is a lack of data in the literature regarding the effects of fasting on resistance exercises and whether this practice may reflect in losses or improvements in morphological and neuromuscular adaptations related to resistance training. Thus, the aim of the present project is to compare the effects of resistance training performed in the fasted state compared to the fed state during 12 weeks on body composition and physical performance in young adults. Thirty-four eutrophic or overweight individuals, not engaged in regular resistance exercises, aged between 20 and 40 years, will be recruited. They will be put on a standard customized diet and will perform 2 weekly sessions of resistance exercise after overnight fasting (10 to 12 hours) or in the fed state, for 12 weeks. Before, in the middle and after this period, evaluations of body composition, muscle thickness and quality, maximum dynamic strength and maximum power will be analyzed. Comparisons will be performed using Generalized Estimating Equations (GEE), adopting the factors group (2 stratifications) and time (3 stratifications). All results will be expressed as mean and standard deviation and the accepted significance level will be 5%.

Conditions

Fasting; Exercise; Resistance Training

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: PARALLEL
• Primary Study Purpose: OTHER
• Blinding Strategy: TRIPLE

Study Groups

Resistance training in the fasted state

Subjects will maintain the standard diet and will perform resistance exercise sessions after overnight fasting (10 to 12 hours). Over the 12 weeks of intervention, participants will perform two sessions a week of resistance exercises.

Group Type: EXPERIMENTAL

Resistance training in the fasted state

Intervention Type: OTHER

On the first day of evaluations, the subjects will perform the basal metabolic rate (BMR) analysis, as well as familiarization with the neuromuscular tests. After the preliminary tests, the volunteers will perform the pre-intervention procedures. Assessments of body composition, muscle thickness and quality, maximum dynamic strength and maximum power will be performed. In addition, instruments related to dietary control and physical activity level will be applied. Subsequently, in a randomized manner, participants will be allocated to one of two different interventions. During the intervention (8 weeks), the adherence to the standard diet will be verified, as well as body composition, muscle thickness and quality, maximum dynamic strength and maximum power will be reassessed. After the 12 weeks of intervention, the volunteers will perform the evaluations referring to the post-intervention moment, following the same steps of the pre-intervention collections.

Resistance training in the fed state

Subjects will maintain the standard diet and will perform resistance exercise sessions in the fed state, between 1 and 2 hours after consuming a carbohydrate-containing meal. Over the 12 weeks of intervention, participants will perform two sessions a week of resistance exercises.

Group Type: ACTIVE_COMPARATOR

Resistance training in the fed state

Intervention Type: OTHER

On the first day of evaluations, the subjects will perform the basal metabolic rate (BMR) analysis, as well as familiarization with the neuromuscular tests. After the preliminary tests, the volunteers will perform the pre-intervention procedures. Assessments of body composition, muscle thickness and quality, maximum dynamic strength and maximum power will be performed. In addition, instruments related to dietary control and physical activity level will be applied. Subsequently, in a randomized manner, participants will be allocated to one of two different interventions. During the intervention (8 weeks), the adherence to the standard diet will be verified, as well as body composition, muscle thickness and quality, maximum dynamic strength and maximum power will be reassessed. After the 12 weeks of intervention, the volunteers will perform the evaluations referring to the post-intervention moment, following the same steps of the pre-intervention collections.

Interventions

Resistance training in the fasted state

On the first day of evaluations, the subjects will perform the basal metabolic rate (BMR) analysis, as well as familiarization with the neuromuscular tests. After the preliminary tests, the volunteers will perform the pre-intervention procedures. Assessments of body composition, muscle thickness and quality, maximum dynamic strength and maximum power will be performed. In addition, instruments related to dietary control and physical activity level will be applied. Subsequently, in a randomized manner, participants will be allocated to one of two different interventions. During the intervention (8 weeks), the adherence to the standard diet will be verified, as well as body composition, muscle thickness and quality, maximum dynamic strength and maximum power will be reassessed. After the 12 weeks of intervention, the volunteers will perform the evaluations referring to the post-intervention moment, following the same steps of the pre-intervention collections.

Intervention Type: OTHER

Resistance training in the fed state

On the first day of evaluations, the subjects will perform the basal metabolic rate (BMR) analysis, as well as familiarization with the neuromuscular tests. After the preliminary tests, the volunteers will perform the pre-intervention procedures. Assessments of body composition, muscle thickness and quality, maximum dynamic strength and maximum power will be performed. In addition, instruments related to dietary control and physical activity level will be applied. Subsequently, in a randomized manner, participants will be allocated to one of two different interventions. During the intervention (8 weeks), the adherence to the standard diet will be verified, as well as body composition, muscle thickness and quality, maximum dynamic strength and maximum power will be reassessed. After the 12 weeks of intervention, the volunteers will perform the evaluations referring to the post-intervention moment, following the same steps of the pre-intervention collections.

Intervention Type: OTHER

Other Intervention Names

Fasting; Strength training; Feeding; Strength training

Eligibility Criteria

Inclusion Criteria

• Men and women;
• Aged between 19 and 40 years;
• Body mass index (BMI) between 18 and 29.9 kg/m²;
• Not engaged in regular strength physical exercise (>1 weekly session) for the last 3 months.

Exclusion Criteria

• Smokers;
• Use of medications and/or supplements that may influence the outcomes evaluated;
• Individuals who have a chronic disease that may prevent physical exercise.

• Minimum Eligible Age: 19 Years
• Maximum Eligible Age: 40 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: Yes

Sponsors

Federal University of Rio Grande do Sul

OTHER

Sponsor Role: lead

Responsible Party

Eduardo Lusa Cadore

Principal Investigator

Responsibility Role: PRINCIPAL_INVESTIGATOR

Locations

Escola de Educação Física, Fisioterapia e Dança - UFRGS

Porto Alegre, Rio Grande do Sul, Brazil

Countries

Brazil

Other Identifiers

URioGrandeESEFID

Identifier Type: -

Identifier Source: org_study_id