The purpose of this project is two-fold: (1) to assess if two different resistance training protocols elicit different responses in the acute phase and (2) to assess if the same two different protocols will elicit different long-term responses on muscular strength, body composition and cardiometabolic health. The project will include 30 adults with obesity (defined as BMI ≥ 30 or abdominal obesity according to the International Diabetes Federation). In the acute phase blood lactate, heart rate, enjoyment and perceived exertion will be assessed after the two resistance training protocols. In addition, the mean 24-h blood glucose concentration after exercise will be compared between the two protocols. For the long-term effects blood markers of cardiometabolic health, blood pressure, body composition, objectively measured physical activity and physical fitness will be assessed before and after the intervention. Also, perceived health-related quality of life will be assessed before and after the intervention.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
PREVENTION
Masking
NONE
Enrollment
31
Will undertake resistance training with moderate loads, and moderate repetitions 3 times per week for 7 weeks.
Will undertake resistance training with low loads, and high repetitions 3 times per week for 7 weeks.
Department of Circulation and Medical Imaging
Trondheim, Norway
Glycated haemoglobin (HbA1c)
Time frame: 7 weeks
Fasting glucose
Time frame: 7 weeks
Blood lipid concentration
Time frame: 7 weeks
C-reactive protein
Time frame: 7 weeks
Systolic blood pressure
Time frame: 7 weeks
Diastolic blood pressure
Time frame: 7 weeks
Body fat
Measured by bioelectrical impedance (InBody 770)
Time frame: 7 weeks
Fat-free mass
Measured by bioelectrical impedance (InBody 770)
Time frame: 7 weeks
Body mass
Measured by bioelectrical impedance (InBody 770)
Time frame: 7 weeks
Visceral fat area
Measured by bioelectrical impedance (InBody 770)
Time frame: 7 weeks
Waist circumference
Time frame: 7 weeks
VO2max (maximal aerobic capacity)
Time frame: 7 weeks
Rate of force development
Measured by Kistler force plate
Time frame: 7 weeks
Muscular strength (1RM)
Leg press and bench press
Time frame: 7 weeks
Muscular endurance
Maximum number of repetitions using 50% of 1-RM
Time frame: 7 weeks
Physical activity
Assessed at three timepoints throughout the intervention using SenseWear armband activity monitors and/or Personal Activity IntelligenceTM (using heart rate monitors and smart phone application).
Time frame: Baseline (before intervention), 4 and 7 weeks.
Health-Related Quality of Life
Using the Short-Form 36 survey and Satisfaction with Physical Function and Appearance Survey
Time frame: 7 weeks
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