A high-calcium intake can accelerate fat loss under energy-restricted diets. Part of this may be due to a shift in substrate metabolism where there is an increase in the rate of fat oxidation. However, whether high-calcium intake can influence substrate metabolism during exercise is not known. Accordingly, we aim to investigate the effect of 2 weeks of high-calcium intake on substrate metabolism during exercise.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
BASIC_SCIENCE
Masking
DOUBLE
Enrollment
13
Northumbria University
Newcastle upon Tyne, Tyne and Wear, United Kingdom
Substrate metabolism
Substrate metabolism will be assessed by the respiratory exchange ratio (rate of carbon dioxide production/rate of oxygen consumption) from samples of expired gas collected during the first 15 minutes of an incremental cycling test.
Time frame: 60 s samples every 3 min for 15 min
Plasma non-esterified fatty acid concentrations
Non-esterified fatty acid concentrations will be determined from plasma samples collected during the first 15 minutes of an incremental cycling test to indicate fatty acid availability.
Time frame: Every 3 min for 15 min
Plasma glycerol concentrations
Glycerol concentrations will be determined from plasma samples collected during the first 15 minutes of an incremental cycling test as a marker of lipolysis.
Time frame: Every 3 min for 15 min
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