Effect of concurrent exercise on post-exercise hypotension in borderline hypertensive women: influence of exercise intensity/Ucinci primjene konkurentnog treninga na pojavu hipotenzije nakon vjezbanja u granicno hipertenzivnih zena: utjecaj intenziteta vjezbanja

The aim was to investigate the effects of concurrent exercise at moderate (MO) and light (LI) intensity on post-exercise hypotension (PEH). Ten women with borderline hypertension were submitted to the experimental procedure consisting of three sessions. In the MO session, the participants ran on the treadmill for 22 minutes at 65% of [HR.sub.max] and then performed 5 resistance exercises against resistance corresponding to 65% of 1RM. In the LI trial, they performed a similar sequence but with intensity of 40% of [HR.sub.max] and 1RM for the endurance and resistance exercise, respectively. The participants rested in a non-exercise control trial (C). The blood pressures were assessed prior and post exercising after 15, 30, 60, 90 and 120 minutes, and after four, five and six hours of recovery. A significant PEH of systolic blood pressure from the resting value was observed after the MO exercise bout at all time points, while the systolic blood pressure following the LI exercise trial decreased significantly only after the fourth hour compared to the resting value. PEH of diastolic blood pressure occurred after both LI and MO for 120 minutes and 5 hours compared to pre-exercise values, respectively. Blood pressure responses were not significantly altered during the C trial. This study suggests that a bout of concurrent endurance and resistance exercise provoked PEH in borderline hypertensive women up to six hours after exercise. However, concurrent exercise at MO intensity resulted in a longer PEH for both systolic and diastolic blood pressure compared to LI intensity. Key words: concurrent exercise, post-exercise hypotension, exercise intensity Cilj je ovog istrazivanja bio istraziti ucinke konkurentnog treninga provedenog umjerenim (MO) i laganim (LI) intenzitetom na pojavu hipotenzije nakon tjelesnog vjezbanja. U istrazivanje, koje se sastojalo od tri eksperimentalne trenazne jedinice, bilo je ukljuceno deset granicno hipertenzivnih zena. Na treningu koji je bio proveden umjerenim intenzitetom ispitanice su 22 minute trcale na pokretnom sagu intenzitetom od 65% maksimalne frekvencije srca ([FS.sub.max]) te su nakon toga provele trening s opterecenjem (5 vjezbi) u kojemu je trenazno opterecenje bilo 65% 1RM. Na drugom treningu, koji je bio proveden laganim intenzitetom, ispitanice su izvodile iste vjezbe istim redoslijedom samo opterecenjem od 40% [FS.sub.max] u trcanju na pokretnom sagu, odnosno 40% 1RM u dijelu treninga s opterecenjem. Ispitanice su se o