Time-Restricted Feeding Plus Resistance Training in Active Females
Not Applicable
Completed
- Conditions
- Healthy Active Females
- Interventions
- Other: Resistance TrainingDietary Supplement: Beta-hydroxy beta-methylbutyrateDietary Supplement: Protein SupplementationBehavioral: Time-Restricted Feeding
- Registration Number
- NCT03404271
- Lead Sponsor
- Texas Tech University
- Brief Summary
The objective of this study is to examine the effects of time-restricted feeding (TRF; consuming all calories within an 8-hour period of time each day) and resistance training, with or without the addition of the dietary supplement HMB, on body composition, muscular performance and physiological outcomes in active females.
- Detailed Description
Not available
Recruitment & Eligibility
- Status
- COMPLETED
- Sex
- Female
- Target Recruitment
- 40
Inclusion Criteria
- Female between 18 and 30 years of age
- Current university affiliation
- Weighing at least 110 pounds
- Generally healthy
- Resistance-trained
- Schedule availability to complete supervised resistance training
- Body fat percentage between 15 and 29%
Exclusion Criteria
- Pregnant or trying to become pregnant
- Currently breastfeeding
- Any disease, condition or orthopedic limitation that would prevent safe participation in resistance training or time-restricted feeding
- Current smoker
- Presence of pacemaker or other electrical implant
- Allergic to dairy proteins
Study & Design
- Study Type
- INTERVENTIONAL
- Study Design
- FACTORIAL
- Arm && Interventions
Group Intervention Description Normal Diet Protein Supplementation Participants in the normal diet (ND) group will follow a traditional dietary pattern, consisting of eating breakfast and continuing to eat throughout the day until the evening. Participants in this group will receive placebo capsules. Participants in all groups will follow an identical resistance training program and be provided with whey protein supplements. Time-Restricted Feeding Protein Supplementation Participants in the time-restricted feeding (TRF) group will consume all calories within an 8-hour period of time each day. Participants in this group will receive placebo capsules. Participants in all groups will follow an identical resistance training program and be provided with whey protein supplements. Normal Diet Resistance Training Participants in the normal diet (ND) group will follow a traditional dietary pattern, consisting of eating breakfast and continuing to eat throughout the day until the evening. Participants in this group will receive placebo capsules. Participants in all groups will follow an identical resistance training program and be provided with whey protein supplements. Time-Restricted Feeding Resistance Training Participants in the time-restricted feeding (TRF) group will consume all calories within an 8-hour period of time each day. Participants in this group will receive placebo capsules. Participants in all groups will follow an identical resistance training program and be provided with whey protein supplements. Time-Restricted Feeding plus HMB Resistance Training Participants in the time-restricted feeding plus HMB (TRF+HMB) group will consume all calories within an 8-hour period of time each day. Participants in this group will receive HMB capsules. Participants in all groups will follow an identical resistance training program and be provided with whey protein supplements. Time-Restricted Feeding plus HMB Protein Supplementation Participants in the time-restricted feeding plus HMB (TRF+HMB) group will consume all calories within an 8-hour period of time each day. Participants in this group will receive HMB capsules. Participants in all groups will follow an identical resistance training program and be provided with whey protein supplements. Time-Restricted Feeding Time-Restricted Feeding Participants in the time-restricted feeding (TRF) group will consume all calories within an 8-hour period of time each day. Participants in this group will receive placebo capsules. Participants in all groups will follow an identical resistance training program and be provided with whey protein supplements. Time-Restricted Feeding plus HMB Beta-hydroxy beta-methylbutyrate Participants in the time-restricted feeding plus HMB (TRF+HMB) group will consume all calories within an 8-hour period of time each day. Participants in this group will receive HMB capsules. Participants in all groups will follow an identical resistance training program and be provided with whey protein supplements. Time-Restricted Feeding plus HMB Time-Restricted Feeding Participants in the time-restricted feeding plus HMB (TRF+HMB) group will consume all calories within an 8-hour period of time each day. Participants in this group will receive HMB capsules. Participants in all groups will follow an identical resistance training program and be provided with whey protein supplements.
- Primary Outcome Measures
Name Time Method Body fat percentage 8 weeks Assessed using multi-compartment model
Upper body muscle hypertrophy 8 weeks Muscle thickness of elbow flexor muscles
Lower body muscle hypertrophy 8 weeks Muscle thickness of knee extensor muscles
Fat mass 8 weeks Assessed using multi-compartment model
Fat-free mass 8 weeks Assessed using multi-compartment model
- Secondary Outcome Measures
Name Time Method Blood C-reactive protein 8 weeks Measured from fasted blood sample
Mood 8 weeks Assessed by questionnaire
Blood glucose 8 weeks Measured from fasted blood sample
Blood insulin 8 weeks Measured from fasted blood sample
Upper body muscular endurance 8 weeks Assessed by repetitions to failure on bench press
Cortisol awakening response 8 weeks Assessed via analysis of saliva samples
Lipid panel 8 weeks Measured from fasted blood sample
Physical activity level 8 weeks Assessed by accelerometry.
Lower body muscular strength 8 weeks Assessed by 1RM on leg press
Lower body muscular endurance 8 weeks Assessed by repetitions to failure on leg press
Upper body muscular strength 8 weeks Assessed by 1RM on bench press
Sleep quality 8 weeks Assessed by Pittsburgh Sleep Quality Index
Lower body muscular power characteristics 8 weeks Assessed during vertical jump and isometric squats
Blood pressure 8 weeks Measured using automated device
Respiratory quotient 8 weeks Assessed by indirect calorimetry
Eating behavior 8 weeks Assessed by three-factor eating questionnaire R18
Arterial compliance 8 weeks Assessed by applanation tonometry
Resting metabolic rate 8 weeks Assessed by indirect calorimetry
Trial Locations
- Locations (1)
Texas Tech University
🇺🇸Lubbock, Texas, United States