Article
Sport Sciences
Jason Tallis, Neil Clarke, Rhys Morris, Darren Richardson, Matthew Ellis, Emma Eyre, Michael Duncan, Mark Noon
Summary: The study evaluated the use of caffeine in elite English soccer clubs, finding that most clubs provided caffeine to players to enhance performance, but there was a wide range and lack of consistency in timing, dosage, and mode of administration.
Review
Nutrition & Dietetics
Slaheddine Delleli, Ibrahim Ouergui, Hamdi Messaoudi, Khaled Trabelsi, Achraf Ammar, Jordan M. Glenn, Hamdi Chtourou
Summary: This systematic review with meta-analysis examines the effects of caffeine supplementation on combat sports performance. The results suggest that caffeine has a small but evident effect on handgrip strength and the total number of throws in judo fitness tests. It also increases blood lactate concentration and heart rate in anaerobic exercise and simulated combat. However, caffeine does not have an impact on other performance measures such as jump height, strength-endurance, offensive actions, and perceived exertion.
Review
Nutrition & Dietetics
Ziyu Wang, Bopeng Qiu, Jie Gao, Juan Del Coso
Summary: Caffeine is widely consumed in sports for its established performance-enhancing effects. While there is ample evidence for the benefits of caffeine supplementation on endurance exercise, most of the studies have focused on cycling trials. This study aimed to systematically review and meta-analyze the effects of caffeine intake on endurance running performance.
Article
Nutrition & Dietetics
Erfan Berjisian, Alireza Naderi, Shima Mojtahedi, Jozo Grgic, Mohammad Hossein Ghahramani, Raci Karayigit, Jennifer L. Forbes, Francisco J. Amaro-Gahete, Scott C. Forbes
Summary: The study aimed to investigate whether the effects of caffeine intake on resistance exercise and jumping performance are influenced by training status. The results showed that caffeine ingestion improved muscular strength, endurance, and jump height, with similar magnitudes observed in resistance-trained and recreationally active men.
Review
Sport Sciences
Adriano Arguedas-Soley, Isobel Townsend, Aaron Hengist, James Betts
Summary: Caffeine is a psycho-active stimulant that can improve physical and cognitive performance. Scientific studies have shown that moderate doses of caffeine can increase heart rate, blood glucose and lactate concentrations, and improve physical performance in team sports such as distance coverage, high-speed distance coverage, and impact frequencies. However, the effects of caffeine on technical skill performance are still uncertain.
JOURNAL OF SPORTS SCIENCES
(2022)
Article
Nutrition & Dietetics
Megan Leonard, Jonathan Maury, Broderick Dickerson, Drew E. Gonzalez, Jacob Kendra, Victoria Jenkins, Kay Nottingham, Choongsung Yoo, Dante Xing, Joungbo Ko, Remi Pradelles, Mark Faries, Wesley Kephart, Ryan Sowinski, Christopher J. Rasmussen, Richard B. Kreider
Summary: This study evaluated the effects of supplementation with a microalgae extract combined with guarana on cognitive function in gamers. The results showed that acute and 30-day supplementation improved reaction times, reasoning, learning, cognitive flexibility, and impulsiveness. There was also evidence that the supplement may support mood state.
Review
Nutrition & Dietetics
Jorge Lorenzo Calvo, Xueyin Fei, Raul Dominguez, Helios Pareja-Galeano
Summary: The relationship between caffeine intake and cognitive performance during exercise has gained attention. Studies suggest that low/moderate doses of caffeine before and/or during exercise can improve self-reported energy, mood, and cognitive functions like attention, as well as potentially impacting simple reaction time, choice reaction time, memory, or fatigue depending on research protocols.
Article
Nutrition & Dietetics
Lonnie M. Lowery, Dawn E. Anderson, Kelsey F. Scanlon, Abigail Stack, Guillermo Escalante, Sara C. Campbell, Chad M. Kerksick, Michael T. Nelson, Tim N. Ziegenfuss, Trisha A. VanDusseldorp, Douglas S. Kalman, Bill I. Campbell, Richard B. Kreider, Jose Antonio
Summary: Based on literature review and analysis, this study concludes that coffee is a complex mixture of compounds with varying effects on physical and cognitive performance. The physiological effects of coffee depend on factors such as dose, timing, habituation, nutrigenetics, gut microbiota differences, sex, and training status. Coffee and its components have been shown to improve performance in various activities, but more research is needed. The optimal dosing of coffee is approximately 2-4 cups, providing a caffeine equivalent of 3-6 mg/kg, 60 minutes prior to exercise.
JOURNAL OF THE INTERNATIONAL SOCIETY OF SPORTS NUTRITION
(2023)
Review
Food Science & Technology
Javier Diaz-Lara, Jozo Grgic, Daniele Detanico, Javier Botella, Sergio L. Jimenez, Juan Del Coso
Summary: The interest in the benefits of caffeine in combat sports has increased significantly. A systematic review and meta-analysis of 25 studies show that caffeine ingestion improves vertical jump height, reaction time, number of throws in a special judo fitness test, and offensive actions during combat. Caffeine ingestion also increases blood lactate concentration after bouts. Overall, supplementing with caffeine can enhance exercise performance in combat sports.
CRITICAL REVIEWS IN FOOD SCIENCE AND NUTRITION
(2022)
Article
Nutrition & Dietetics
Choongsung Yoo, Dante Xing, Drew Gonzalez, Victoria Jenkins, Kay Nottingham, Broderick Dickerson, Megan Leonard, Joungbo Ko, Mark Faries, Wesley Kephart, Martin Purpura, Ralf Jaeger, Shawn D. Wells, Ryan Sowinski, Christopher J. Rasmussen, Richard B. Kreider
Summary: The study suggests that acute ingestion of paraxanthine may affect some measures of short-term memory, reasoning, and response time to cognitive challenges, and help sustain attention.
Article
Nutrition & Dietetics
George Bowra Morris, Ralph Johannes Francisca Manders, Andrew Thomas Hulton
Summary: Fencers habitually consume caffeine to enhance cognitive performance, but there is a lack of understanding and education on caffeine supplementation. Limited education leads to potential negative side effects and anti-doping infringements among fencers.
FRONTIERS IN NUTRITION
(2022)
Article
Nutrition & Dietetics
Ivan Ruiz-Fernandez, David Valades, Raul Dominguez, Carmen Ferragut, Alberto Perez-Lopez
Summary: The study found that acute caffeine intake can improve muscular strength, power, and endurance performance, especially at high loads (>= 75% 1RM) and in lower-body exercises (back squat).
EUROPEAN JOURNAL OF NUTRITION
(2023)
Article
Nutrition & Dietetics
Magdalena Kaszuba, Olga Klocek, Michal Spieszny, Aleksandra Filip-Stachnik
Summary: A study found that chewing caffeinated gum can significantly improve the accuracy of volleyball attacks, but has no effect on jumping, running, and other skill-based tests.
Review
Nutrition & Dietetics
Ishay Ostfeld, Jay R. R. Hoffman
Summary: Beta-alanine is a nonessential amino acid that combines with histidine to form carnosine, which plays an important role as an intracellular buffer. The use of beta-alanine supplements has been shown to enhance anaerobic muscle performance and has become popular among athletes and soldiers. Evidence suggests that beta-alanine supplementation may also have benefits for soldier resilience, including increasing resistance to post-traumatic stress disorder, traumatic brain injury, and heat stress.
Article
Nutrition & Dietetics
Haley Fye, Caroline Pass, Kate Dickman, Eric Bredahl, Joan Eckerson, Jacob Siedlik
Summary: The study found that using a MIPS before sustained running can increase time to fatigue (TTF) and blood lactate concentration in highly trained runners, but has no effect on heart rate (HR) or perceived exertion (RPE).
Article
Education & Educational Research
Odelia van Stryp, Eileen Africa, Martin Kidd, Michael J. Duncan
Summary: The aim of this study was to investigate the impact of classroom-based physically active brain-breaks on the in-school activity levels of Grade 1 learners. The results showed a decrease in sedentary behavior and an increase in vigorous physical activity during the intervention. This emphasizes the importance of participation in daily physical activity to improve in-school activity levels and decrease sedentary behavior among Grade 1 students.
Article
Education & Educational Research
Wesley O'Brien, Conor Philpott, Diarmuid Lester, Sarahjane Belton, Michael J. Duncan, Brian Donovan, Fiona Chambers, Till Utesch
Summary: This study provides evidence of convergent validity between functional movement and fundamental movement skill assessments in adolescence. It presents an evidence-informed rationale for physical education pedagogues to move beyond traditional perceptions of movement as being exclusively pertaining to physical skills, to a more holistic concept of motor competence comprising of both movement skills and movement patterns.
PHYSICAL EDUCATION AND SPORT PEDAGOGY
(2023)
Article
Clinical Neurology
Thayna Bezerra, Carlos Cristi-Montero, Paulo Felipe Bandeira, Anastacio Souza Filho, Joseph Duncan, Clarice Martins
Summary: This study investigated the relationships between executive function (EF), physical activity (PA), and associated factors in low-income preschoolers. The results highlighted moderate PA and preterm birth as the most important variables in the network. Future interventions should focus on increasing moderate PA, with special attention to preterm children.
APPLIED NEUROPSYCHOLOGY-CHILD
(2023)
Article
Nutrition & Dietetics
Justin D. Roberts, Joseph B. Lillis, Jorge Marques Pinto, Havovi Chichger, Alvaro Lopez-Samanes, Juan Del Coso, Rodrigo Zacca, Ashley G. B. Willmott
Summary: This study investigated the chronic effects of supplementation with a biodynamic and organic olive fruit water phytocomplex on exercise performance and recovery. Results showed that the supplement improved exercise performance and acute recovery. Further research is needed to determine the optimal dosage and if it can enhance long-term training adaptations.
Review
Nutrition & Dietetics
Ziyu Wang, Bopeng Qiu, Jie Gao, Juan Del Coso
Summary: Caffeine is widely consumed in sports for its established performance-enhancing effects. While there is ample evidence for the benefits of caffeine supplementation on endurance exercise, most of the studies have focused on cycling trials. This study aimed to systematically review and meta-analyze the effects of caffeine intake on endurance running performance.
Article
Sport Sciences
Freddy Brown, Mathew Hill, Derek Renshaw, Charles Pedlar, Jessica Hill, Jason Tallis
Summary: This study assessed the reliability of garment interface pressure measurements and lower-limb maximal voluntary contraction forces in non-resistance-trained males. The results showed that strength declined between days in consecutive testing, while cycling peak power increased. These findings highlight the importance of considering strength losses resulting from performance tests when assessing recovery.
SPORTS ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Aaron Miralles-Iborra, Victor Moreno-Perez, Juan Del Coso, Javier Courel-Ibanez, Jose L. L. Elvira
Summary: This study introduces a field-based test for assessing hamstring and quadriceps strength in the knee, which can be used to detect muscle deficits in football players. It provides reliable measurements for maximal isometric strength but less reliable measurements for rate of force development.
APPLIED SCIENCES-BASEL
(2023)
Article
Sport Sciences
Victor Moreno-Perez, Juan Del Coso, Roberto Lopez-Del Campo, Ricardo Resta, Jose Romero-Sanguesa, Javier Courel-Ibanez, Alberto Mendez-Villanueva
Summary: This study examined the influence of accumulated match-play exposure on hamstring strain injury in professional football players. It found that low match-play exposures in the previous matches increased the risk of hamstring injuries. Metrics from the match before the injury showed the best accuracy in predicting injury occurrence.
SPORTS HEALTH-A MULTIDISCIPLINARY APPROACH
(2023)
Article
Sport Sciences
Jason Tallis, Rhys O. Morris, Michael J. Duncan, Emma L. J. Eyre, Lucas Guimaraes-Ferreira
Summary: This study compared countermovement jump (CMJ) height assessed using MyJump2 to force-platform-derived jump height calculated from time in the air and take-off velocity, and found that MyJump2 assessment was more accurate and applicable.
Review
Nutrition & Dietetics
Jorge Gutierrez-Hellin, Juan Del Coso, Mario C. Espada, Victor Hernandez-Beltran, Catia C. Ferreira, David Varillas-Delgado, Nuria Mendoza Laiz, Justin D. Roberts, Jose M. Gamonales
Summary: In recent decades, there have been numerous studies investigating the effects of oral caffeine intake on fat oxidation. However, there has been no bibliometric analysis to assess the research activity in this field. This study conducted a bibliometric and visual analysis to assess the scientific output regarding oral caffeine intake and fat oxidation rate. The findings demonstrate that this is a nutrition research area with a strong foundational base of scientific evidence, and future research should focus on the effects of sex and caffeine tolerance on fat burning, as well as translational research in ecologically valid contexts.
Article
Hospitality, Leisure, Sport & Tourism
Michael J. Duncan, Emma L. J. Eyre, Neil Clarke, Abdul Hamid, Yanguo Jing
Summary: This study used a machine learning approach to determine the contributors to technical skills in grassroots youth soccer players. The results showed that fundamental movement skills (FMS) score, coach rating, years of playing experience, and age at peak height velocity (APHV) were important factors in predicting technical soccer skills. The findings suggest that FMS is the most important contributor to technical skills in boys who play grassroots soccer.
INTERNATIONAL JOURNAL OF SPORTS SCIENCE & COACHING
(2023)
Article
Psychology, Developmental
Steven James Eustace, Maximilian Wdowski, Jason Tallis, Michael Duncan
Summary: This study examined the relationship between trunk flexor and extensor strength and time to stability (TTS) and center of pressure (CoP) during hop and hold tasks. The results showed that concentric trunk flexors were the strongest predictor for TTS, and both flexors and extensors were strong predictors for TTS. These findings have important implications for evaluating trunk musculature strength and postural control in young healthy individuals, and highlight the potential benefits of improving trunk musculature strength for dynamic balance tasks in children, reducing the risk of falls and injuries.
JOURNAL OF MOTOR LEARNING AND DEVELOPMENT
(2023)
Article
Physiology
Sharn P. Shelley, Rob S. James, Steven J. Eustace, Emma L. J. Eyre, Jason Tallis
Summary: Evidence suggests that high-dose vitamin D-3 supplementation has limited effects on skeletal muscle contractility and does not offset the adverse effects of a high-fat diet. However, small to moderate effect sizes suggest improvement in muscle performance and animal morphology in high-fat diet with vitamin D supplementation groups.
EXPERIMENTAL PHYSIOLOGY
(2023)
Article
Health Care Sciences & Services
Michael J. Duncan, Lucas Guimaraes-Ferreira, Jason Tallis, Irineu Loturco, Anthony Weldon, Rohit K. Thapa
Summary: This study aimed to determine and compare the 'optimum power load' in the hexagonal (HBDL) and straight (SBDL) bar deadlift exercises. The results showed that the HBDL had greater peak power at 60% load, average power at 50-70% load, and average velocity at 50% of 1RM load compared to the SBDL.
BIOMEDICAL HUMAN KINETICS
(2023)
