The combined effects of a pre-workout supplement and three weeks of high-intensity interval training on critical velocity, anaerobic running capacity, training volume, and body composition in men and women
نویسندگان
چکیده
Methods Twenty-five well-trained recreational athletes (mean ± SD age = 21 ± 2 yrs; stature = 172 ± 9 cm; body mass = 66 ± 12 kg, VO2max = 48 ± 9 ml·kg-1·min-1, percent body fat = 19 ± 7%) were assigned to either the active supplement (n = 12) or placebo (PL, n = 11) group. The active supplement (Game Time®, GT, Corr-Jensen Laboratories Inc., Aurora, CO) was 18 g of powder, 40 kcals, and consisted of a proprietary blend including whey protein, cordyceps sinensis, arginine, creatine, citrulline, ginseng, and caffeine. The PL was also 18 g of power, 40 kcals, and consisted of only maltodextrin, natural and artificial flavors and colors. Thirty minutes prior to all testing and training sessions, participants consumed their respective supplements mixed with 8–10 oz of water. Both groups participated in a three week HIIT program three days per week, and testing was conducted before and after the training. Cardiovascular fitness (VO2max) was assessed using closed circuit spirometry (Parvo Medics TrueOne® 2400 Metabolic Measurement System, Sandy, UT) during graded exercise tests on a treadmill (Woodway, Pro Series, Waukesha, WI). Also, four high-speed runs to exhaustion were conducted at 110, 105, 100, and 90% of the treadmill velocity recorded during VO2max, and the distances achieved were plotted over the times-to-exhaustion. Linear regression was used to determine the slopes (critical velocity, CV) and Y-intercepts (anaerobic running capacity, ARC) of these relationships to assess aerobic and anaerobic performances, respectively. Training volumes were tracked by summing the distances achieved during each training session for each subject. Percent body fat (%BF) and fat-free mass (FFM) were assessed with air-displacement plethysmography (BOD POD®, Life Measurement, Inc., Concord, CA).
منابع مشابه
The effects of a pre-workout supplement containing caffeine, creatine, and amino acids during three weeks of high-intensity exercise on aerobic and anaerobic performance
BACKGROUND A randomized, single-blinded, placebo-controlled, parallel design study was used to examine the effects of a pre-workout supplement combined with three weeks of high-intensity interval training (HIIT) on aerobic and anaerobic running performance, training volume, and body composition. METHODS Twenty-four moderately-trained recreational athletes (mean +/- SD age = 21.1 +/- 1.9 yrs; ...
متن کاملThe Effect of High-Intensity Interval Training and Sleep Regulation on Some Inflammatory Markers, Anaerobic Capacity, and Body Composition in Teenage Girls with Sleep Disorders
متن کامل
Effects of High-Intensity Interval and Mini-Trampoline Training with Calorie Restriction on Body Composition and Aerobic Capacity in Overweight and Obese women
Introduction: Weight gain and obesity are one of the most important health issues and one of the most severe public health problems. This study aimed to determine the effect of 10 weeks of High-Intensity Interval training (HIIT) and Mini-Trampoline training (MTT) with calorie restriction (CR) on body composition and aerobic capacity in overweight and obese women. Materials and Methods: Forty-ei...
متن کاملThe Effect of Low Volume High Intensity Interval Training on Sarcolemmal Content of Fatty Acid Transport Proteins (FAT/CD36 and FABPpm) in Young Men
High-intensity interval training (HIT) induces skeletal muscle metabolic and performance adaptations that resemble traditional endurance training despite a low total exercise volume. On the other hand, fatty acid oxidation is increases in skeletal muscle with endurance training. This process is regulated in several sites, including the transport of fatty acids across the plasma membrane. The...
متن کاملEffect of Eight Weeks\' Endurance Training along with Fenugreek Ingestion on Lipid Profile, Body Composition, Insulin Resistance and VO2max in Obese Women\'s with Type2 Diabetes
Background: Physical activity combined with some herbal supplementations can affect body energy metabolism, blood lipids and physical fitness levels. However, the effect of exercise training combined with fenugreek on lipid metabolism and body composition in patients with type2 diabetes is unknown. Objective: The aim of present study was to investigate the effects of eight weeks’ enduran...
متن کامل