Examining the Physiological Effects of a SIT and Resistance Training Intervention on Sedentary Women with Metabolic Syndrome Risk Factors
Type of DegreePhD Dissertation
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This study assessed the effects of a 10-week sprint interval training (SIT) and resistance training (RT) intervention on waist circumference (WC), blood pressure (BP), fasting plasma glucose (FPG), triglycerides (TG), high-density lipoproteins (HDL), body composition, VO2max, and strength in sedentary women. Thirty-eight females (Age = 38 ± 8 years, BMI= 33 ± 8 kg/m2) completed a 10-week, 30-session SIT and RT intervention. Paired samples t-tests compared pre and post BP, FPG, TG, HDL, MetS z-score and body composition. A repeated-measures ANOVA examined differences in the pre, mid (week 6) and post WC and three repetition maximum (3-RM) for the squat and bench press measures. Logistical regression was used to measure the dose response relationship between sessions attended and MetS z-score. The results showed significant decreases in systolic (p=0.007; pre = 129±18 mm/Hg; post = 125±12 mm/Hg), diastolic (p=0.005; pre = 81±7 mm/Hg; post = 79±6 mm/Hg), and mean arterial pressure (p<0.001; pre 81±7 mm/Hg; post = 79±6 mm/Hg). A significant decrease (p=0.007) in WC occurred from pre- (111 ±18 cm) to post- (107 ±16 cm). MetS z-score significantly (p=0.001) decreased from pre- (1.127 ± 3.696) to post- (-0.236 ± 3.216 mm/Hg). Fat mass decreased significantly (p=0.004; pre 41.6 ± 14.7 kg; post 40.1 ± 15.1 kg), and lean body mass increased significantly (p<0.001; pre 46.4 ± 14.9; post 47.6 ± 7.1 kg). VO2max significantly increased (p<0.001; pre 23.7 ± 5.0 ml/kg/min; post 28.1 ± 6.5 ml/kg/min). Back squat significantly increased (p<0.001) from pre (27.7 ± 9.8 kg) to mid (46.9 ± 11.7 kg), pre to post (60.3 ± 13.5 kg), and mid to post training. Bench press significantly increased (p < 0.001) from pre (22.3 ± 7.6 kg) to mid (36.4 ± 7.6 kg), pre to post (41.5 ± 8.2 kg), and mid to post-training. Logistical regression showed that 24 sessions were needed to promote decreases in the odds of MetS. This study revealed that a 10-week SIT and RT intervention can significantly decrease BP, WC, FM and MetS z-score while increasing LBM, VO2max and strength in sedentary women who are at risk for metabolic syndrome.