The acute blood flow restriction and its impact on heart rate and endurance performance among recreationally active students / Nazurah Atiqa Abd Aziz and Nurul Ain Abu Kasim

Blood flow restriction (BFR) training has gained attention for its potential to enhance performance [1], yet its acute cardiovascular and endurance effects remain unclear. This study investigates the immediate impact of BFR training on heart rate variability (HRV) and endurance performance in recreationally active students, addressing mixed findings in prior research. Understanding these acute responses is essential for determining BFR's safety and optimizing its application in fitness and performance settings [2]. This study involved 12 recreationally active male students (age 21.79 ± 3.21 years) who completed the Yo-Yo Intermittent Recovery Test Level 1 under BFR. HRV was measured using the Polar H10 heart rate monitor, and endurance performance was assessed via a 15-minute jogging test with GPS tracking. Participants were selected using convenience sampling for homogeneity in fitness levels and training experience.