Time-Restricted Feeding Plus Resistance Training in Active Females

Texas Tech University40 enrolled

Overview

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.

Study Type

INTERVENTIONAL

Allocation

RANDOMIZED

Purpose

OTHER

Masking

TRIPLE

Enrollment

Conditions

Healthy Active Females

Interventions

Beta-hydroxy beta-methylbutyrateDIETARY_SUPPLEMENT

3 grams per day of the calcium salt form of beta-hydroxy beta-methylbutyrate (HMB).

Resistance TrainingOTHER

Performing supervised resistance training three times per week.

Protein SupplementationDIETARY_SUPPLEMENT

Consuming a protein supplement daily.

Eligibility

Sex: FEMALEMin age: 18 YearsMax age: 30 YearsHealthy volunteers:

Medical Language ↔ Plain English

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

Locations (1)

Texas Tech University

Lubbock, Texas, United States

Outcomes

Primary Outcomes

Fat mass

Assessed using multi-compartment model

Time frame: 8 weeks

Fat-free mass

Assessed using multi-compartment model

Time frame: 8 weeks

Body fat percentage

Assessed using multi-compartment model

Time frame: 8 weeks

Upper body muscle hypertrophy

Muscle thickness of elbow flexor muscles

Time frame: 8 weeks

Lower body muscle hypertrophy

Muscle thickness of knee extensor muscles

Time frame: 8 weeks

Secondary Outcomes

Lower body muscular strength

Assessed by 1RM on leg press

Time frame: 8 weeks

Lower body muscular power characteristics

Assessed during vertical jump and isometric squats

Time frame: 8 weeks

Lower body muscular endurance

Assessed by repetitions to failure on leg press

Time frame: 8 weeks

Upper body muscular strength

Assessed by 1RM on bench press

Time frame: 8 weeks

Upper body muscular endurance

Data from ClinicalTrials.gov

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