The randomised, double-blind, crossover examine, revealed within the journal Vitamins, assessed the impact of supplementing with 5 mg/kg physique weight caffeine over one week of coaching.
The authors from Spain discovered that the influence of caffeine consumption improved the well-being, bodily efficiency and notion of fatigue within the ladies’s volleyball workforce athletes.
Feminine-focused analysis wanted
Caffeine is commonly utilized in athletic efficiency as an ergogenic support, with its recognition on the rise as a result of its impact on cardio and anaerobic actions, growing power and energy capability by enhancing intracellular calcium and Na+-Ok+ ATPase pump exercise and delaying the onset of fatigue via activation of the central nervous system, which blocks the adenosine receptors.
It has been nicely established {that a} vary of supplementation with a dose of three to 9 mg/kg physique weight enhances athletic efficiency. And caffeine consumption one hour earlier than a coaching session has been proven to be an optimum technique to boost efficiency as a result of its quick absorption and plasma availability.
The authors famous that whereas earlier volleyball research have reported the impact of caffeine on leaping enchancment, elements corresponding to agility and alter of course stay unclear and that extra proof is required to find out the impact of caffeine on agility, particularly in ladies’s volleyball.
“Caffeine has been confirmed to ship constructive outcomes in decreasing perceived exertion and diminishing muscular soreness or harm, though to a lesser diploma than in males,” they wrote. “And, a principal undesirable facet to contemplate relating to caffeine supplementation in athletes is that it may negatively have an effect on sleep high quality, particularly in ladies athletes as a result of the impact of caffeine persists longer in ladies than in males.
“The scientific literature on the ergogenic impact of caffeine on ladies’s volleyball gamers is scarce or missing, which highlights the significance of this matter in volleyball. Therefore, you will need to know its results on bodily efficiency, fatigue, and wellness.”
The ‘tremendous league’ examine
The researchers recruited a pattern of eight semi-professional ladies’s volleyball gamers from the “Spanish Ladies’s Superleague 2” between the ages of 17 and 25 years and assigned them to both a caffeine or placebo supplementation group. The caffeine group consumed 5 mg/kg of caffeine anhydrous powder primarily based on physique weight earlier than acute coaching. Individuals switched teams after a one-week washout interval.
In each teams, individuals carried out countermovement jumps, repeated jumps and handgrip checks, and alter of course was assessed. Nicely-being was additionally evaluated by wellness questionnaire.
Outcomes from ANOVA checks revealed a principal impact of supplementation (F (1.7) = 8.41, p = 0.02, η2 = 0.54) throughout the coaching week on bodily efficiency. The researchers additionally reported a big impact of caffeine supplementation on perceived muscle harm and fatigue (F (1.7) = 7.29, p = 0.03, and η2 = 0.51), in addition to higher handgrip ends in the caffeine group as in comparison with placebo however solely within the dominant hand.
“Additional related analysis is required in ladies that collects each bodily efficiency and well-being parameters and correlates these variables, notably in extremely aggressive durations such because the playoffs,” the researchers concluded.
Supply: Vitamins
doi: doi.org/10.3390/nu16010029
“The Impact of Caffeine Supplementation on Feminine Volleyball Gamers’ Efficiency and Wellness throughout a Common Coaching Week”
Authors: Jesús Siquier-Coll et al.
