The purpose of this study is to determine the ability of acute exercise to regulate fat metabolism in muscle of overweight and obese people compared to lean people.
After being informed about the study details and possible risks and benefits, 15 overweight/obese and 15 lean participants gave written informed consent and were then screened and enrolled in the study. All participants then gave a muscle sample and ate a calorically controlled breakfast. Participants completed \~1 hour of cycling exercise on a stationary bike and gave a second muscle sample 4 hours after eating breakfast.
Study Type
INTERVENTIONAL
Allocation
NON_RANDOMIZED
Purpose
BASIC_SCIENCE
Masking
SINGLE
Enrollment
30
All participants consumed a standardized, high carbohydrate meal (7 kcal/kg; 60% carbohydrate, 25% fat, 15% protein) and completed an exercise testing trial, expending a total of 650 kcal upon completion 4h later.
Purdue University
West Lafayette, Indiana, United States
Change from baseline in skeletal muscle acylcarnitines
Metabolomics of skeletal muscle acylcarnitines is used as a measure of mitochondrial function by assessing long, medium and short chain acylcarnitine levels.
Time frame: Baseline and immediately after acute cycling exercise
Change from baseline in skeletal transcriptome
RNA-seq is a method used to quantify changes in all known messenger RNA levels in the genome, giving an assessment of whole genome gene transcription changes.
Time frame: Baseline and immediately after acute cycling exercise
Change from baseline in skeletal muscle whole genome nucleosome maps
MNase-seq is a method used to determine the occupancy/location of nucleosomes throughout the entire genome, supporting evidence of alterations in epigenetic modifications occurring at specific genomic loci that affect nucleosome occupancy/location and possibly gene transcription or silencing.
Time frame: Baseline and immediately after acute cycling exercise
Glucose
Commercially validated and available colorimetric used to determine plasma glucose levels.
Time frame: Baseline and immediately after acute cycling exercise
Insulin
Commercially validated and available ELISAs used to determine plasma insulin levels.
Time frame: Baseline and immediately after acute cycling exercise
Triglycerides
Commercially validated and available colorimetric kits used to determine plasma triglyceride levels.
Time frame: Baseline and immediately after acute cycling exercise
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Free fatty acids
Commercially validated and available colorimetric kits used to determine plasma free fatty acid levels.
Time frame: Baseline and immediately after acute cycling exercise
Cholesterol
Commercially validated and available colorimetric kits used to determine total cholesterol, HDL, LDL and VLDL levels in plasma.
Time frame: Baseline and immediately after acute cycling exercise