Much research has been done in sports nutrition in recent years as the demand for performance-enhancing substances increases. Higher intake of nitrates from the diet can increase the bioavailability of nitric oxide (NO) via the nitrate–nitrite–NO pathway. Nevertheless, the increased availability of NO does not always lead to improved performance in some individuals. This review aims to evaluate the relationship between the athlete’s training status and the change in time trial performance after increased dietary nitrate intake. Articles indexed by Scopus and PubMed published from 2015 to 2019 were reviewed. Thirteen articles met the eligibility criteria: clinical trial studies on healthy participants with different training status (according to VO_2max), conducting time trial tests after dietary nitrate supplementation. The PRISMA guidelines were followed to process the review. We found a statistically significant relationship between VO_2max and ergogenicity in time trial performance using one-way ANOVA (p = 0.001) in less-trained athletes (VO₂ < 55 mL/kg/min). A strong positive correlation was observed in experimental situations using a chronic supplementation protocol but not in acute protocol situations. In the context of our results and recent histological observations of muscle fibres, there might be a fibre-type specific role in nitric oxide production and, therefore, supplement of ergogenicity.

The aim of this study was to investigate the effect of ingesting sodium bicarbonate (SB) and sodium citrate (SC) on 400 m high-intensity swimming performance and blood responses. Six nationally ranked male swimmers (20.7 ± 2.1 yrs; 184 ± 6 cm; 79.9 ± 3.9 kg; 10.6 ± 1% body fat) participated in a double blinded, placebo controlled crossover trial. Ninety minutes after consuming SB (0.3 g·kg^-1), SC (0.3 g·kg^-1) or a placebo (PL) participants completed a single 400-m freestyle maximal test on three consecutive days. The order of the supplementation was randomized. Capillary blood samples were collected on 4 occasions: at rest (baseline), 60 min post-ingestion, immediately post-trial and 15 min post-trial. Blood pH, HCO_3- concentration and base excess (BE) were determined. Blood pH, HCO_3-, BE were significantly elevated from before loading to the pre-test (60 min post-ingestion) (p < 0.05) after SB ingestion, but not after SC ingestion (p > 0.05). Performance times were improved by 0.6% (p > 0.05) after supplementation of SB over PL in 5 out of 6 participants (responders). In contrast, ingestion of SC decreased performance by 0.2% (p > 0.05). No side effects were observed in either trial. Delayed blood response was observed after SC ingestion compared to SB and this provided no or modest ergogenic effect, respectively, for single bout high-intensity swimming exercise. Monitoring the magnitude of the time-to-peak level rise in alkalosis may be recommended in order to individualize the loading time accordingly before commencement of exercise.

We examined whether supraliminal word stimuli can affect walking speed of older adults in laboratory settings. The 78 physically active subjects (age >65 years) were randomly assigned to prime and control conditions. All subjects walked 19 m measured distance pre- and post-completing a word search puzzle containing either words associated with early adulthood or neutral ones. Although participants in the prime group went faster in the posttest, the ANOVA did not reveal significant interaction between the subjects’ conditions and walking speed. No significant priming effect of exposure to words on walking speed in older adults was detected in the current study. There is a need for further research, as there is a lack of data in this age cohort. The priming effect could possibly be used to increase the physical activity of seniors and may bias the clinical outputs in gait tests.

Overweight and obese children often suffer for many physiological and psychological is-sues. Resistance training allows them to excel over their peers due to strength ability which is related to their somatotype. The aim of this study was to examine the effect of an eight-week resistance training program on body composition in overweight and obese children. Study sample included 8 boys and 4 girls (age = 11.7 ± 1.54) who were involved in an eight-week strength specifically designed program consisted of two strength training unit per week. Resistance of exercise was set on 8‒10 RM. Body composition were measured by InBody 720 two times before and after the training intervention. The Wilcoxon matched pairs test was used. Results showed increase in total body weight (2.7%), lean body mass (2.5%) and fat mass (3.7%). This effect indicates that used resistance training program is suficient to lean body mass grow. Nevertheless, program proved to be inadequate to avoid an increase in fat mass. This could be caused by many factors which should be consider in further research (e.g. longer technique practice, diet, number of training units).

Relative Energy Deficiency in Sport (REDs) is a syndrome caused by chronic low energy availability (LEA) and can disrupt hormonal, metabolic and psychological functioning. Adolescents are particularly vulnerable because they are still growing, have high energy requirements and are susceptible to sociocultural pressures. Despite increasing scientific attention, awareness and prevention of REDs remain insufficient in everyday sport settings. This community case study describes the Energy for Long-Term Health initiative, implemented in 2025–2026 in the Czech Republic across six sports-focused secondary schools (≈300 students, aged 15–19 years). Each school received an interactive workshop (60–120 min) structured into four blocks: (1) explanation of energy availability and its practical implications; (2) consequences of LEA for health and performance; (3) recognition of warning signs and risk situations; and (4) preventive strategies and the role of the support team. Secondary target groups included coaches, teachers and parents, who were engaged through reusable visual materials and online dissemination via the online platform. Key lessons were that adolescent REDs education requires age-appropriate language, opportunities for anonymous questions and careful facilitation of sensitive topics. Combining face-to-face workshops with online resources extended reach and reinforced key messages. Although no formal evaluation of effectiveness was conducted, high attendance and positive informal feedback suggest that university-supported community initiatives can enhance awareness of REDs among young athletes and their support networks. Future applications should incorporate formal needs assessments, systematic evaluation, and validated measures of knowledge and behaviour change.