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Item Strategies for the Reduction of Adipose Tissue and Retention of Muscle Mass in Overweight Individuals(North Dakota State University, 2020) Kotarsky, Christopher JosephPurpose: The purpose of this study was to determine whether time-restricted feeding (TRF) was an effective dietary strategy for reducing fat mass and preserving fat-free mass while evaluating potential changes in cardiometabolic biomarkers, hormones, muscle performance, and energy and macronutrient intake after eight weeks of aerobic exercise and resistance training in overweight and obese adults. Methods: This study was a randomized, controlled trial. Sedentary, overweight and obese adults (mean ± SD; age: 44.48 ± 7.28 years; BMI: 29.61 ± 2.62 kg/m2; females: 85.71%; males: 14.29%) were randomly assigned to a TRF or normal feeding (NF) dietary strategy group. The TRF group consumed all calories between 1200 and 2000 hours, whereas the NF group ate their typical diet. All groups completed eight weeks of aerobic exercise and supervised resistance training. Body composition, muscle performance, energy and macronutrient intake, physical activity, and physiological variables were assessed week zero and week nine. Results: A total of 21 participants completed the study (NF: n = 10; TRF: n = 11). A mild energy restriction was seen for the TRF (~300 kcal/day, 14.0%) and NF (~250 kcal/d, 11.0%) groups between baseline and week seven. Losses of total body mass were significantly greater for TRF (3.3%) relative to NF (0.2%), of which TRF had significantly greater losses of fat mass (9.0%) compared to NF (3.3%) despite similar reductions in energy intake. Lean mass increased across the intervention for both TRF (0.6%) and NF (1.9%), with no group differences. Conclusion: These data support the use of TRF and concurrent exercise training as a short-term dietary strategy for reducing fat mass and preserving lean mass in overweight and obese adults.Item Effect of Progressive Calisthenic Push-up Training on Muscle Strength and Thickness(North Dakota State University, 2016) Kotarsky, Christopher JosephCalisthenics, a form of resistance training, continue to increase in popularity; however, few studies have examined their effectiveness for muscle strength improvement. The purpose of this study was to compare progressive calisthenic push-up training (PUSH) to free weight bench press training (BENCH) as techniques to develop muscle strength and thickness. Twenty-three healthy, moderately trained males (mean ± SD: age 23 ± 6.8 years) were randomly assigned to PUSH (n=14) and BENCH (n=9), and trained three days per week for four weeks. Muscle thickness, seated medicine ball put, one repetition max bench press (1RM), and push-up progression (PUP) were measured pre- and post-training. Results revealed significant increases in 1RM (p<0.001) and PUP (p<0.05) for both groups post-training. The increase in PUP, however, was significantly greater for PUSH (p<0.001). This study is the first to demonstrate that calisthenics, using different progressive variations to maintain training principles, can improve upper body muscle strength.