Increasing daily step count from 10,000 to 15,000 steps does not further reduce postprandial triglycerides and may result in elevated nonesterified fatty acids, indicating a non-linear dose-response relationship between step count and cardiovascular risk reduction.

Walking 10,000 steps increases the body's ability to clear fat from the blood after a meal by activating enzymes that break down triglycerides in muscle and fat tissue. Walking 15,000 steps overstimulates fat tissue, causing it to release too many fatty acids into the blood, which blocks the liver from responding to insulin and raises blood sugar. The extra fatty acids cancel out the benefit of clearing more triglycerides, so going beyond 10,000 steps doesn't help further.