Effects of Acute Dietary Nitrate Supplementation on Selected Isokinetic Performance Variables in Physically Active Men
Jurga J, Kabaciński J, Fryzowicz A, Murawa M
Nutrients · 0 citas
Cómo se estudió
- Diseño
- Ensayo controlado aleatorizado (indexado por PubMed)
- Estudiado en
- Personas
- Resultado principal
- Marcadores de salud y funcionamiento
- Consumo medido con
- No se indica
Quién lo pagó
- Financiación
- Financiación independiente
- Gobierno
- Ministerstwo Edukacji i Nauki
- Universidad u hospital
- Poznan University of Physical Education
Según 2 financiadores declarados y la declaración de financiación del texto completo.
Publicación
- Publicado
- 2026-07-21 · Nutrients · vol. 18 · número 14 · pág. 2377
- Editorial
- Multidisciplinary Digital Publishing Institute
- Citado
- 0 citas · más que el 53% de estudios similares · 0.0× el promedio de su campo
- Referencias
- 37 trabajos
- Acceso
- Acceso abierto (revista) · CC-BY
- Áreas de investigación
- Muscle metabolism and nutrition · Cardiovascular and exercise physiology · Sports Performance and Training
- Palabras clave
- dietary nitrate, beetroot juice, isokinetic strength, isokinetic power, neuromuscular activity, surface electromyography, blood lactate, nitric oxide bioavailability, muscle fatigue, physically active men
- MeSH
- muscle, skeletal, humans, beta vulgaris, nitrates, lactic acid, electromyography, exercise, cross-over studies, double-blind method, muscle fatigue, muscle contraction, torque, dietary supplements, adult, male, muscle strength, young adult, fruit and vegetable juices
4 autores
- Jakub Jurga
- Jarosław Kabaciński
- Anna Fryzowicz
- Michał Murawa
Resumen
El texto original del estudio, en el idioma en que se publicó.
Background
Dietary nitrate may enhance skeletal muscle performance by increasing nitric oxide bioavailability. Although its benefits for endurance exercise are well documented, less is known about its effects on isokinetic strength and power performance. This study examined the effects of acute nitrate ingestion on isokinetic performance, neuromuscular activity, and metabolic responses in physically active men.
Methods
Thirteen physically active young men (25.0 ± 5.2 years) participated in a randomized, double-blind, placebo-controlled crossover study. During separate experimental sessions, participants consumed either nitrate-rich beetroot juice containing 800 mg of nitrate or a low-nitrate placebo. Following a 2 h absorption period, they performed isokinetic knee extension-flexion tests at angular velocities of 60°/s, 180°/s, and 240°/s. Surface electromyography was recorded from the vastus medialis oblique and vastus lateralis oblique muscles, and blood lactate concentrations were measured before and after exercise.
Results
Nitrate supplementation significantly improved peak torque, relative peak power, and selected torque angle variables at 60°/s and 180°/s compared with placebo (p p > 0.05). No significant differences were observed in electromyographic parameters or post-exercise blood lactate concentration. Similarly, post-exercise blood lactate concentrations were comparable between treatments (p > 0.05).
Conclusions
Acute dietary nitrate supplementation may improve selected isokinetic performance variables during low- and moderate-velocity contractions, whereas no significant effects were observed during the 240°/s fatigue protocol. No changes were detected in electromyographic parameters or post-exercise blood lactate concentration. The physiological mechanisms underlying these findings remain to be established.
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