Three Days of Intermittent Fasting: Repeated-Sprint Performance Decreased by Vertical-Stiffness Impairment
Cherif A, Meeusen R, Farooq A, Ryu J, Fenneni MA, Nikolovski Z, Elshafie S, Chamari K, Roelands B
International journal of sports physiology and performance · 18 citas
Cómo se estudió
- Diseño
- Ensayo controlado aleatorizado (indexado por PubMed)
- Estudiado en
- Personas
- Resultado principal
- Marcadores de salud y funcionamiento
Quién lo pagó
- Financiación
- Financiación independiente
- Gobierno
- Anti-Doping Laboratory Qatar
Según 1 financiador declarado.
Publicación
- Publicado
- 2016-06-01 · Int J Sports Physiol Perform · vol. 12 · número 3 · págs. 287–294
- Editorial
- Human Kinetics
- Citado
- 28 citas · más que el 77% de estudios similares · 0.9× el promedio de su campo
- Referencias
- 0 trabajos
- Acceso
- De pago
- Áreas de investigación
- Dietary Effects on Health · Sports Performance and Training · Cardiovascular and exercise physiology
- Palabras clave
- intermittent fasting, repeated sprint performance, vertical stiffness, sprint speed, sprint power, insulin, free fatty acids, HDL cholesterol, triglycerides, lipid profile, muscle power
- MeSH
- muscle, skeletal, humans, hormones, insulin, fatty acids, nonesterified, triglycerides, fasting, running, time factors, islam, adult, male, cholesterol, ldl, cholesterol, hdl, athletic performance, biomechanical phenomena
9 autores
- Anissa Cherif · autor de correspondencia
- ROMAIN R. MEEUSEN
- Abdulaziz Farooq
- Joong Hyun Ryu
- Mohamed Amine Fenneni
- Зоран Николовски
- Sittana Shamseldin Elshafie
- Karim Chamari
- Bart Roelands
Resumen
El texto original del estudio, en el idioma en que se publicó.
Purpose
To examine the effects of 3 d of intermittent fasting (3d-IF: abstaining from eating/drinking from dawn to sunset) on physical performance and metabolic responses to repeated sprints (RSs).
Methods
Twenty-one active males performed an RS test (2 sets: 5 × 5-s maximal sprints with 25 s of recovery between and 3 min of recovery between sets on an instrumented treadmill) in 2 conditions: counterbalanced fed/control session (CS) and fasting session (FS). Biomechanical and biochemical markers were assessed preexercise and postexercise.
Results
Significant main effects of IF were observed for sprints: maximal speed (P = .016), mean speed (P = .015), maximal power (P = .035), mean power (P = .049), vertical stiffness (P = .032), and vertical center-of-mass displacement (P = .047). Sprint speed and vertical stiffness decreased during the 1st (P = .003 and P = .005) and 2nd sprints (P = .046 and P = .048) of set 2, respectively. Postexercise insulin decreased in CS (P = .023) but not in FS (P = .230). Free-fatty-acid levels were higher in FS than in CS at preexercise (P < .001) and at postexercise (P = .009). High-density lipoprotein cholesterol (HDL-C) was higher at postexercise in FS (1.32 ± 0.22 mmol/L) than in CS (1.26 ± 0.21 mmol/L, P = .039). The triglyceride (TG) concentration was decreased in FS (P < .05) compared with CS.
Conclusions
3d-IF impaired speed and power through a decrease in vertical stiffness during the initial runs of the 2nd set of RS. The findings of the current study confirmed the benefits of 3d-IF: improved HDL-C and TG profiles while maintaining total cholesterol and low-density lipoprotein cholesterol levels. Moreover, improving muscle power might be a key factor to retain a higher vertical stiffness and to partly counteract the negative effects of intermittent fasting.
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