An interventional study of High-intensity functional training and Traditional resistance training in Healthy, sponsored by University of South Carolina. Completed at 1 site in United States. Open to participants aged 18 Years to 35 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2026-02-11.
Sponsored by University of South Carolina · Not applicable, Interventional, and Other
The purpose of this study is to investigate the effects of high-intensity functional training (HIFT) as compared to traditional resistance training (RT) and concurrent training consisting of RT and high-intensity interval training (HIIT) on physical performance metrics, body composition, and mental and physical readiness of tactical personnel.
This study assesses the impact of 8-weeks of high-intensity functional training (HIFT) as compared to traditional resistance training (RT) and concurrent training consisting of RT and high-intensity interval training (HIIT) on various performance outcomes. The main questions the study aims to answer are:
Participants will:
University of South Carolina is the lead sponsor of 191 studies on the registry; 41 are open to participants now.
Counted across the registry records on this site, refreshed daily.
Exclusion Criteria:
Training will include power and strength movements, then 30 minutes of metabolic conditioning training comprised of whole-body multi-joint movements.
Behavioral: High-intensity functional training
This group will perform traditional resistance training.
Behavioral: Traditional resistance training
This group will perform traditional resistance training followed by 20 minutes of running, high intensity intervals.
Behavioral: Concurrent training
Participants assigned to this group will undergo 8 weeks of high-intensity functional training.
Participants assigned to this group will undergo 8 weeks of traditional strength and hypertrophy training.
Participants assigned to this group will undergo 8 weeks of traditional strength and hypertrophy training followed by high-intensity interval aerobic training.
Changes in body composition body fat percentage.
Body fat percentage via air-displacement
Time frame: Baseline and Week 10
Changes in body composition fat-free mass.
Fat-free mass via air-displacement plethysmography.
Time frame: Baseline and Week 10
Changes in body composition dry fat-free mass.
Dry fat-free mass via air-displacement plethysmography and bio-electrical impedance.
Time frame: Baseline and Week 10
Changes in upper body strength.
Upper body strength assessed by 1 repetition maximum bench press.
Time frame: Baseline and week 10
Changes in lower body strength.
Lower body strength assessed by isometric mid-thigh pulls on bilateral force plates.
Time frame: Baseline and week 10
Changes in maximal oxygen consumption.
Changes in VO2max measured by maximal graded exercise test with indirect calorimetry.
Time frame: Baseline and week 10
Changes in ventilatory threshold.
Changes in ventilatory threshold measured by maximal graded exercise test with indirect calorimetry.
Time frame: Baseline and week 10
Changes in velocity at VO2 max.
Assessed by maximal graded exercise test with indirect calorimetry.
Time frame: Baseline and week 10
Internal training load between groups.
Assessed by heart rate chest strap using Edwards training impulse calculation.
Time frame: Every training session over the 8-week intervention period will be included in this calculation.
Changes in training distress
Overall training distress and subscales including depressed moods, vigor, physical signs and symptoms, sleep disturbances, perceived stress, and general fatigue using the multicomponent training distress scale, scaled 0 - 110 with higher scores indicating more distress.
Time frame: Baseline, once per week for the 8 training weeks.
Changes in anaerobic power.
Measured by countermovement jump through bilateral force plates.
Time frame: Baseline, once per week for the 8 training weeks.
This study is completed, as verified in Feb 2026. You cannot join it, but the record below documents what was studied.
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