Acute Effects of Sprint Interval Training and Blood Flow Restriction on Neuromuscular and Muscle Function

• Published in: Journal of musculoskeletal & neuronal interactions Vol. 24; no. 1; pp. 38 - 46
• Main Authors: Gonzalez Rojas, David H, Wizenberg, Aaron M, Rivera, Paola M, Proppe, Christopher E, Lawson, John E, Stock, Matt S, Stout, Jeffrey R, Billaut, François, Hill, Ethan C
• Format: Journal Article
• Language: English
• Published: Greece International Society of Musculoskeletal and Neuronal Interactions 01-03-2024
• Subjects: Electromyography; High-Intensity Interval Training; Humans; Isometric Contraction - physiology; Male; Muscle Fatigue; Muscle, Skeletal - physiology; Original; Regional Blood Flow - physiology; Torque; sEMG; PWC; BFR; SIT; Threshold
• ISSN: 1108-7161

BFR) applied during sprint interval training (SIT) on performance and neuromuscular function.
Fifteen men completed a randomized bout of SIT with CBFR, IBFR, and without BFR (No-BFR), consisting of 2, 30-s maximal sprints on a cycle ergometer with a resistance of 7.5% of body mass. Concentric peak torque (CPT), maximal voluntary isometric contraction (MVIC) torque, and muscle thickness (MT) were measured before and after SIT, including surface electromyography (sEMG) recorded during the strength assessments. Peak and mean revolutions per minute (RPM) were measured during SIT and power output was examined relative to physical working capacity at the fatigue threshold (PWC
).
CPT and MVIC torque decreased from pre-SIT (220.3±47.6 Nm and 355.1±72.5 Nm, respectively) to post-SIT (147.9±27.7 Nm and 252.2±45.5 Nm, respectively, all P<0.05), while MT increased (1.77±0.31 cm to 1.96±0.30 cm). sEMG mean power frequency decreased during CPT (-12.8±10.5%) and MVIC (-8.7±10.2%) muscle actions. %PWC
was greater during No-BFR (414.2±121.9%) than CBFR (375.9±121.9%).
SIT with or without BFR induced comparable alterations in neuromuscular fatigue and sprint performance across all conditions, without affecting neuromuscular function.