Background: In ice hockey, regular off-ice testing can serve as a controlling mechanism for a training program's effectiveness. Objective: The main aim of this study was to describe changes in selected morphological and physiological parameters, intended to be relevant for a complex ice hockey performance, after two months of pre-season training preparation following one month of an off-season period. Methods: The sample consisted of 22 adult male players aged 18-39 years from a top Czech ice hockey league team. Two laboratory testing procedures performed at the end of the off-season and after two months of the pre-season conditioning consisted of basic anthropometry and body composition measurements, countermovement jump (CMJ), and maximal incremental test focused on the assessment of various parameters, including maximal oxygen consumption (V̇O2max), maximal power output during the test (Pmax) or estimation of anaerobic threshold intensity (ANT). Results: After the pre-season, we found a significant decrease in body fat (13.7 vs. 11.4%, p < .001) and an increase in fat-free mass (74.2 vs. 76.6 kg, p < .001), V̇O2max (relative 48.8 vs. 52.6 ml.kg-1.min-1 p = .001; absolute 4.20 vs. 4.54 L.min-1, p < .001), Pmax (5.26 vs. 5.44 W.kg-1, p = .011), power output at ANT (4.07 vs. 4.35 W.kg-1, p < .001), and CMJ (44.9 vs. 47.1 cm, p = .002). Conclusions: Based on our results, two months of the pre-season training program led to a significant improvement in body composition and physical performance levels in professional Czech ice hockey players.

• MeSH
• dospělí MeSH
• hokej * MeSH
• kondiční příprava * metody   MeSH
• lidé MeSH
• sportovní výkon MeSH
• svalová síla MeSH
• tělesná výkonnost MeSH
• vytrvalostní trénink metody   MeSH
• Check Tag
• dospělí MeSH
• lidé MeSH
• mužské pohlaví MeSH
• Publikační typ
• klinická studie MeSH
• Geografické názvy
• Česká republika MeSH

PURPOSE: This study investigated the effects of acute, pre-exercise, hydrogen rich water (HRW) ingestion on running time to exhaustion at maximal aerobic speed in trained track and field runners. METHODS: Twenty-four, male runners aged 17.5 ± 1.8 years, with body mass index = 21.0 ± 1.3 kg⋅m-2, and maximal oxygen uptake = 55.0 ± 4.6 ml⋅kg-1⋅min-1 (mean ± standard deviation) participated in this randomized, double-blind, placebo-controlled crossover study. All runners ingested 1260 ml of HRW which was divided into four doses and taken at 120 min (420 ml), 60 min (420 ml), 30 min (210 ml), and 10 min (210 ml) prior to exercise. The running protocol consisted of three phases: warm-up performed at 10 km⋅h-1 for 3 min, followed by a transition phase performed at an individually determined speed (10 km⋅h-1 + maximal aerobic speed)/2 for 1 min, and finally the third phase performed at individual maximal aerobic speed until exhaustion. Time to exhaustion, cardiorespiratory variables, and post-exercise blood lactate concentration were measured. RESULTS: When running to exhaustion at maximal aerobic speed, compared with placebo, HRW had no significant effects on the following variables: time to exhaustion (217 ± 49 and 227 ± 53 s, p = 0.20), post-exercise blood lactate concentration (9.9 ± 2.2 and 10.1 ± 2.0 mmol⋅L-1, p = 0.42), maximal heart rate (186 ± 9 and 186 ± 9 beats⋅min-1, p = 0.80), and oxygen uptake (53.1 ± 4.5 and 52.2 ± 4.7 ml⋅kg-1⋅min-1, p = 0.33). No variable assessed as a candidate moderator was significantly correlated with time to exhaustion (Spearman's correlation coefficients ranged from -0.28 to 0.30, all p ≥ 0.16). CONCLUSIONS: Pre-exercise administration of 1260 ml of HRW showed no ergogenic effect on running performance to exhaustion at maximal aerobic speed in trained track and field runners.

• MeSH
• dvojitá slepá metoda MeSH
• fyzická vytrvalost * MeSH
• klinické křížové studie MeSH
• kyselina mléčná MeSH
• kyslík farmakologie   MeSH
• lehká atletika * MeSH
• lidé MeSH
• pití MeSH
• spotřeba kyslíku MeSH
• vodík farmakologie   MeSH
• Check Tag
• lidé MeSH
• mužské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH
• práce podpořená grantem MeSH
• randomizované kontrolované studie MeSH

BACKGROUND: Vibroacoustic therapy (VAT) uses low-frequency sound, often combined with listening to music, for therapeutic purposes. However, the impact of low-frequency vibration (LFV) on physiological functions and subjective perception is relatively unknown. METHODS: We conducted a randomized cross-over study with the aim of comparing the effect of constant LFV of 40 Hz, its amplitude modulation, and the placebo condition on heart rate variability (HRV), stress perception (measured by visual analogue scales for stress) and mood (measured by UWIST Mood Adjective Check List). RESULTS: Research experiments with various interventions (constant LFV with sound of nature (river in forest), amplitude modulation of the same LFV with sounds of nature and sounds of nature without LFV) were realised involving 24 participants. It was found there was an effect on HRV, stress perception and mood after the interventions. However, there were only seldomly experienced, and mostly nonsignificant, differences between the intervention conditions, so the effects may be attributed to factors other than LFV. CONCLUSIONS: Large scale experimental studies are needed to verify the preliminary findings and to explore various coinciding factors that may have influenced the results of this study, e.g., type of autonomic nervous system. We propose that the effect of LFV exposure may differ when combined with listening to music, and this hypothesis should be investigated in future studies.

• Publikační typ
• časopisecké články MeSH

Molecular hydrogen (H2) is potentially a novel therapeutic gas for acute post-coronavirus disease 2019 (COVID-19) patients because it has antioxidative, anti-inflammatory, anti-apoptosis, and antifatigue properties. The aim of this study was to determine the effect of 14 days of H2 inhalation on the respiratory and physical fitness status of acute post-COVID-19 patients. This randomized, single-blind, placebo-controlled study included 26 males (44 ± 17 years) and 24 females (38 ± 12 years), who performed a 6-min walking test (6 MWT) and pulmonary function test, specifically forced vital capacity (FVC) and expiratory volume in the first second (FEV1). Symptomatic participants were recruited between 21 and 33 days after a positive polymerase chain reaction test. The experiment consisted of H2/placebo inhalation, 2 × 60 min/day for 14 days. Results showed that H2 therapy, compared with placebo, significantly increased 6 MWT distance by 64 ± 39 m, FVC by 0.19 ± 0.24 L, and, in FEV1, by 0.11 ± 0.28 L (all p ≤ 0.025). In conclusion, H2 inhalation had beneficial health effects in terms of improved physical and respiratory function in acute post-COVID-19 patients. Therefore, H2 inhalation may represent a safe, effective approach for accelerating early function restoration in post-COVID-19 patients.

• MeSH
• COVID-19 * MeSH
• jednoduchá slepá metoda MeSH
• lidé MeSH
• respirační funkční testy MeSH
• SARS-CoV-2 MeSH
• usilovný výdechový objem MeSH
• vodík terapeutické užití   MeSH
• Check Tag
• lidé MeSH
• mužské pohlaví MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH
• práce podpořená grantem MeSH
• randomizované kontrolované studie MeSH

Hydrogen-rich water (HRW) supplementation has been shown to have an antifatigue effect across different modes of exercise. However, its effect on repeated sprint performance is unknown. The aim of this study was to assess the effect of pre-exercise HRW consumption on repeated sprint performance, lactate, and perceptual responses using a repeated sprint protocol. This randomized, double blinded, placebo controlled, crossover study included 16 professional, male soccer players aged 18.8 ± 1.2 years. Athletes performed two indoor tests, particularly 15 × 30 m track sprints interspersed by 20 s of recovery, separated by a 1-week washout period. Sprint time was measured at 15 m and 30 m. Ratings of perceived exertion were assessed immediately after each sprint, and post-exercise blood lactate concentration was measured after the last sprint. There were significantly faster sprint times after HRW consumption compared with placebo at 15 m for the 14th and 15th sprints, representing improvements in time of 3.4% and 2.7%, respectively. Sprint time at 30 m also significantly improved by 1.9% in the HRW group in the last sprint. However, neither lactate concentrations nor ratings of perceived exertion were significantly different between HRW and placebo. Pre-exercise HRW supplementation is associated with an increased ability to reduce fatigue, especially during the later stages of repeated sprint exercise.

• MeSH
• běh * fyziologie   MeSH
• dospělí MeSH
• fotbal * fyziologie   MeSH
• klinické křížové studie MeSH
• kyselina mléčná MeSH
• lidé MeSH
• mladiství MeSH
• mladý dospělý MeSH
• sportovní výkon * fyziologie   MeSH
• vodík MeSH
• Check Tag
• dospělí MeSH
• lidé MeSH
• mladiství MeSH
• mladý dospělý MeSH
• mužské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH
• randomizované kontrolované studie MeSH

Background: Hydrogen-rich water (HRW) has been shown to have a stimulating effect on the human body. Objective: The aim of the study was to assess the influence of acute HRW intake on autonomic cardiac regulation during 50 min of rest sitting. Methods: Fourteen healthy females (age 21.7 ± 1.2 years, body mass 67.8 ± 8.7 kg, height 167 ± 5.5 cm) took part in this double-blind, randomized, placebo-controlled trial with crossover design. Heart rate variability (HRV) was monitored in the sitting position after administration of 1260 ml of HRW or placebo. Time domain indexes of HRV as the square root of the mean of the squares of differences between adjacent RR intervals (RMSSD), the standard deviation of all RR intervals (SDNN) and the ratio of SDNN/RMSSD as an index of sympatho-vagal balance were used to assess autonomic cardiac response. The values were transformed using natural logarithm (Ln). Results: After administration of HRW, we found significantly increased ratio Ln SDNN/RMSSD when comparing it to placebo in 25 min (HRW: 0.40 ± 0.30, placebo: 0.26 ± 0.25, p = .049) and 35 min (HRW: 0.44 ± 0.30, placebo: 0.28 ± 0.28, p = .029) of rest sitting. Ln SDNN was significantly increased after HRW administration when compared to placebo in 45 min (HRW: 4.41 ± 0.42 ms, placebo: 4.28 ± 0.31 ms, p = .049) of rest sitting. Conclusions: Acute HRW ingestion induced a relative increase in sympathetic activity between 25 and 35 min post-ingestion, whereas vagal activity was not affected.

• Klíčová slova
• vodíková voda,
• MeSH
• autonomní nervový systém * MeSH
• klinická studie jako téma MeSH
• lidé MeSH
• mladiství MeSH
• mladý dospělý MeSH
• sympatický nervový systém MeSH
• voda MeSH
• vodík * MeSH
• Check Tag
• lidé MeSH
• mladiství MeSH
• mladý dospělý MeSH
• ženské pohlaví MeSH

Amputací na horní končetině dochází ke vzniku asymetrie v rozložení hmotnosti těla, která se projevuje ve změnách polohy vybraných segmentů a z toho plynoucích odchylkách v držení těla. Mění se statika osového systému, zvyšují se nároky na posturální stabilitu. U osob s amputací na horní končetině roste riziko pádů. Důležitým faktorem pro zmenšení těchto negativních změn je používání vhodné protézy, která pozitivně ovlivňuje dynamickou lokomoční stabilitu. Cílem studie bylo určit vliv protézy na posturu a její stabilitu v bipedálním stoji u osob s amputací na horní končetině. Dvanáct osob (věk 50,6 ± 18,5 roku; doba užívání protézy 21,3 ± 19,1 roku) s jednostrannou amputací na horní končetině absolvovalo hodnocení postury (systém DTP-3) a posturální stability (dvě silové plošiny). Výsledky ukázaly, že při aplikaci protézy došlo v bipedálním stoji k zmenšení bederní lordózy a hrudní kyfózy. Použití protézy významně neovlivnilo úroveň posturální stability ve stoji s otevřenýma ani zavřenýma očima.

Upper limb amputation causes weight-bearing asymmetry, which leads to changes in body posture. Statics of the spine changes, postural control demands increase, and risk of falling rises. A suitable prosthesis which positively affects locomotor stability can help to mitigate these negative impacts of amputation. The aim of this study was to assess the effect of prosthesis on body posture and postural stability in upper limb amputees. Twelve persons with unilateral upper limb amputation (age 50.6 ± 18.5 years, time since amputation 21.3 ± 19.1 years) participated in the study. They underwent assessment of static posture (noninvasive 3D system DTP-3) and balance in quiet bipedal stance with eyes open and closed (two force plates) with and without a prosthesis. Wearing a prosthesis led to a decrease in lumbar lordosis and thoracic kyphosis; however, it did not significantly affect standing balance.

• MeSH
• amputace škodlivé účinky   MeSH
• horní končetina * MeSH
• interpretace statistických dat MeSH
• lidé středního věku MeSH
• lidé MeSH
• postura těla fyziologie   MeSH
• posturální rovnováha * fyziologie   MeSH
• protézy a implantáty * MeSH
• senioři MeSH
• Check Tag
• lidé středního věku MeSH
• lidé MeSH
• mužské pohlaví MeSH
• senioři MeSH
• ženské pohlaví MeSH
• Publikační typ
• klinická studie MeSH

• Publikační typ
• abstrakt z konference MeSH

• Publikační typ
• abstrakt z konference MeSH

• Publikační typ
• abstrakt z konference MeSH