IB Sports, Exercise and Health Science (SEHS) Practice Exam 2026 – Comprehensive All-in-One Guide to Exam Success!

Static (isometric) exercise raises blood pressure in both the systolic and diastolic phases. When a muscle contracts without shortening, intramuscular pressure rises and compresses blood vessels, reducing blood flow to the working muscle. To meet the muscle’s demand and push blood against the higher resistance, the heart increases cardiac output and the sympathetic nervous system increases vascular tone, raising total peripheral resistance. This combination pushes arterial pressure higher throughout the cardiac cycle: the systolic value climbs because the heart pumps with more force against greater resistance, and the diastolic value also increases because the high peripheral resistance is sustained during the contraction. In contrast to dynamic exercise, where diastolic pressure changes are often smaller, static effort generally elevates both values, making the statement true.