The goal of this randomized crossover clinical trial is to investigate the effects of interrupting prolonged sitting with intermittent walks of equal volume but at different frequencies, in addition to moderate-intensity aerobic exercise, on postprandial serum lipid profile in young adults between the ages of 18-30. The main questions it aims to answer are: * Do interrupting prolonged sitting with intermittent walks of equal volume but at different frequencies sustain positive cardiometabolic effects after moderate-intensity aerobic exercise? * If "yes", which frequency of breaks is more effective to provide cardiometabolic benefits? Participants will complete four conditions on separate days: 1) 6.5 hours of prolonged sitting after 30 minutes of moderate intensity aerobic exercise 2) breaking prolonged sitting with 2 minutes of walking every 30 minutes after 30 minutes of moderate intensity exercise 3) breaking prolonged sitting with 4 minutes of walking every 1-h after 30 minutes of moderate intensity exercise 4) breaking prolonged sitting with 8 minutes of walking every 2-h after 30 minutes of moderate intensity aerobic exercise.
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Capillary glucose area under the curve
Timeframe: During the four 7.5-hour intervention sessions samples will be collected at the 30th, 60th, 90th, 120th and 210th minutes after breakfast, and at the 30th, 60th, 90th, 120th and 210th minutes after lunch.
Serum Low-Density Lipoprotein cholesterol area under the curve
Timeframe: During the four 7.5-hour intervention sessions, 5 mL blood samples will be drawn at the 60th, 120th and 210th minutes after breakfast and at the 60th, 120th and 210th minutes after lunch
Serum High-Density Lipoprotein cholesterol area under the curve
Timeframe: During the four 7.5-hour intervention sessions, 5 mL blood samples will be drawn at the 60th, 120th and 210th minutes after breakfast and at the 60th, 120th and 210th minutes after lunch
Serum total cholesterol area under the curve
Timeframe: During the four 7.5-hour intervention sessions, 5 mL blood samples will be drawn at the 60th, 120th and 210th minutes after breakfast and at the 60th, 120th and 210th minutes after lunch
Serum triglycerides area under the curve
Timeframe: During the four 7.5-hour intervention sessions, 5 mL blood samples will be drawn at the 60th, 120th and 210th minutes after breakfast and at the 60th, 120th and 210th minutes after lunch