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#nitric oxide

5 articles
A landscape editorial still life on a soft, warm oat-colored linen surface, lit by diffused natural window light from the left. In the center sits a shallow matte ceramic bowl in muted sage green holding a small mound of fine white arginine powder. Beside it rests a wooden scoop dusted with powder. To the left, a loose arrangement of dried Astragalus root slices, pale golden and delicate, fans out in a graceful curve. To the right, a few whole Panax notoginseng roots, knobbly and earthy brown, sit next to a small pile of finely ground tan powder on a folded cream paper. A single sprig of fresh green leaf adds a gentle accent in the background. In the foreground, a minimalist glass beaker with clear water and a thin linen-wrapped glass dropper sit slightly out of focus. Behind the objects, a softly blurred backdrop in pale blush and sand tones carries a faint, abstract pattern of soft circular shapes, like ripples or molecular dots drawn in subtle terracotta ink. A thin hand-drawn line graph in dusty coral rises gently across the upper right of the background, as if sketched on textured paper, with no readable text. The composition uses generous negative space on the upper left, which leaves room for a headline overlay. The palette is earthy and calm: sage, cream, terracotta, honey gold, and soft blush. The shallow depth of field gives creamy bokeh. Gentle shadows fall to the right. The overall feel is clean and contemporary, like a wellness and science journal cover, with subtle film grain, high-end editorial photography, and tactile natural textures.
nutrition

Doplněk, který zvýšil vstřebávání argininu o 17 % v malém testu

BY DR. GYMBRO ·

Křížová studie z roku 2023 zjistila, že kombinace 5 g argininu s kapslí obsahující saponiny z astragalu a Panax notoginseng (APS) zvýšila vstřebávání argininu o 17,3 % a poměr arginin/ADMA posunula o 167,1 %. Současně vzrostly i močové koncentrace dusičnanů a cGMP – dva ukazatele oxidu dusnatého. Studie však zahrnovala pouze 24 analyzovaných účastníků a neprověřovala sportovní výkon. V následujícím textu rozebereme, co data skutečně dokazují, co ne a pro koho je třeba být opatrný.
A wide, editorial-style photograph of a lone cyclist's legs and torso mid-sprint on a stationary indoor bike in a bright, minimalist performance studio. The scene is shot from a low three-quarter angle with shallow depth of field. The cyclist wears matte charcoal shorts and a fitted sage-green top, with a subtle sheen of sweat catching soft window light. Their hands grip the handlebars and the pedals are caught in a slight motion blur, which conveys explosive effort. In the foreground, slightly out of focus on a pale oak side table, sit a small matte white scoop and a clear glass of water. Next to them is a little ceramic dish holding a few off-white capsules and a pinch of fine white powder. A folded linen towel and a slim stopwatch rest nearby. The stopwatch face is softly legible, hinting at timed sprint intervals. The background is warm cream concrete and pale wood, with tall windows casting long diagonal shafts of golden morning light across the floor. Faint dust motes drift in the light. On the wall behind, a clean, abstract line graph is painted in muted terracotta and deep teal. It shows one line rising in steps like five sprint bouts and another line gently falling, a subtle visual nod to power up and lactate down. The graph is minimal and stylized, with no readable numbers or text. The color palette is earthy and modern: sage green, terracotta, warm cream, soft charcoal, and touches of natural wood. The lighting is soft and directional with gentle highlights and natural shadows. The overall look is calm, refined, and contemporary, like a premium wellness and sports science magazine cover. The composition follows the rule of thirds, with the cyclist on the right and open negative space on the left for a headline. The image is crisp, grainy in a subtle film-like way, and free of any futuristic or sci-fi elements.
science research

Tato forma karnitinu zvýšila sprintový výkon až o 15 % a snížila laktát

BY DR. GYMBRO ·

Křížová studie z roku 2009 zjistila, že jednorázová dávka 4,5 g glycin‑propionyl‑L‑karnitinu (GPLC) zvýšila špičkový i průměrný sprintový výkon o 2,6 % až 15 % během pěti maximálních cyklistických sprintů. Laktát v krvi byl po 14 minutách cvičení o 16,2 % nižší. „15 %“ je horní hranice rozsahu, ne průměr, a výzkum proběhl jen u 24 mužů v jedné laboratoři. Článek popisuje, jak se GPLC liší od běžného L‑karnitinu a ALCAR, kde zapadá teorie oxidu dusnatého a kdo by z doplňku mohl mít největší prospěch. Dále se věnuje dávkování, načasování a omezením dostupných důkazů.
A wide, editorial-style flat lay photographed from above on a pale warm-gray stone countertop in soft morning window light. On the left, a small matte white ceramic bowl holds fine white arginine powder, with a wooden scoop resting beside it. At the center, two halved oranges and one whole lemon in saturated citrus tones, with a few glossy droplets of water on the cut surfaces, to suggest vitamin C. On the right, three slim amber glass capsule bottles with minimal cream labels and no legible text stand in a loose row, with a few white capsules spilling out. A single chrome dumbbell handle enters the frame from the upper right corner, partly cropped, its cool metallic sheen contrasting with the warm fruit. A sprig of green rosemary and a folded linen napkin in oatmeal beige add texture. Long soft shadows fall to the left. The palette is warm cream, sunny orange, soft yellow, and muted sage, with a few crisp accents of steel gray. The composition is airy and uncluttered, with generous negative space in the upper left for a title overlay. It has a shallow depth of field, a crisp foreground, and a faintly blurred background. The look is clean, contemporary, and wellness-magazine, like a premium health and fitness journal cover, with natural grain, high-end product photography quality, and a calm, fresh, trustworthy mood.
science research

3 g argininu + 500 mg vitamínu C: Testosteron stoupl o 26 % u kulturistů

BY DR. GYMBRO ·

Arginin byl dlouho považován za nadhodnocený podnětník dusičnaného oxidu, ale nová randomizovaná studie přináší zvrat – kombinaci s vitamínem C. U 50 mužských kulturistů po 45 dnech užívání 3 g argininu (rozdělených do tří dávek) a 500 mg vitamínu C došlo k výraznému zvýšení testosteronu i VO2max ve srovnání s placebem a zároveň k úbytku tělesného tuku. Růstový hormon, kortizol ani dusíková bilance se mezi skupinami významně nelišily. Jedná se o levný stack, který stojí za pozornost, ale pochází jen z jedné malé studie a vyšší testosteron nezaručuje větší svalovou hmotu.
A wide, editorial-style flat lay photographed from above on a pale warm-gray concrete surface, lit by soft natural window light with gentle long shadows. On the left, two matte ceramic bowls in muted sage green and cream sit side by side. One holds fine white crystalline powder, the other holds slightly coarser off-white powder. Between them, a small brass measuring scoop rests on the surface, dusted with powder. Behind the bowls, two simple amber glass jars with minimal cream labels and no legible text stand slightly out of focus. On the right side, a pair of chalk-dusted black hex dumbbells and a worn leather lifting strap curve across the frame. A folded charcoal gym towel sits beneath them. A rumpled matte-black shaker bottle lies on its side near the top edge. A slice of watermelon, the natural source of citrulline, sits on a small white ceramic plate in the lower center. Its vivid coral-pink flesh and dark seeds add a saturated pop of color against the neutral palette. A few loose watermelon seeds and a scattering of white powder dust trail across the surface toward the dumbbells, tying the composition together. In the lower left corner, an open notebook with blank cream pages holds a slim silver pen and a minimalist analog stopwatch. A thin line of hand-drawn tally marks suggests counted reps, with no readable words or numbers. The palette is restrained and contemporary: warm grays, sage, cream, charcoal, and amber, with the watermelon's coral-pink as the single bright accent. The mood is calm, clean, and precise, like a modern wellness or science-journal feature. Shallow depth of field keeps the powder bowls and watermelon crisp while the background items soften slightly. Generous negative space across the upper center leaves room for a headline overlay. The photograph looks high-end and tactile, with a subtle film-grain finish.
nutrition

L‑citrulin vs citrulin‑malát: zvrat ve vytrvalosti horního těla

BY DR. GYMBRO ·

Všichni se hádají, zda je lepší čistý L‑citrulin nebo citrulin‑malát, ale šestitýdenní studie přinesla zajímavější závěr. Obě formy překonaly placebo v počtu opakování do selhání u cviků na horní část těla a zvýšily hladinu metabolitů oxidu dusnatého. Žádná však nezvýšila maximální sílu (1RM) a u nohou se projevila jen jako trend. Studie zahrnovala pouhých 33 trénované muže, takže jde spíše o slibný signál než definitvní verdikt.
A cyclist in a fitted matte-black kit, shot from a low three-quarter angle, rides a sunlit country road at early morning, slightly out of focus with soft motion blur on the wheels. In the foreground on the left sits a rustic wooden table with a tall glass of deep magenta beetroot juice. Condensation beads on the glass, and the light catches its vivid jewel-toned color. Beside it lie two whole beetroots with their leafy red-veined greens still attached, and one halved beet shows concentric crimson-and-pink rings. A small linen napkin and a scatter of water droplets add an editorial still-life feel. The background is a gently rolling landscape with golden-green fields and a thin ribbon of asphalt curving toward the horizon. Pale mist hangs low and warm sunlight comes from the right, creating long soft shadows and a golden rim light on the glass and the cyclist's silhouette. The shallow depth of field keeps the juice and beets crisp while the rider stays a dreamy blurred suggestion of speed. The palette is rich magenta, burgundy, warm cream, sage green, and soft gold, with muted, slightly desaturated tones in the background so the beetroot color stands out. The composition follows the rule of thirds, with the still-life in the lower left third and open negative space in the upper right for the title. The overall look is a clean, modern lifestyle-magazine photograph with natural film-like grain, calm and athletic, and no text, logos, or futuristic elements.
nutrition

Celerová šťáva před časovým úsilím: Jak 0,5 l zkrátil časy na 4 km a 16,1 km o téměř 3 %

BY DR. GYMBRO ·

Malá, ale výmluvná křížová studie z roku 2011 zkoušela, zda jediný nápoj z červené řepy může urychlit cyklistické časovky. Devět soutěžních mužských cyklistů vypilo 0,5 l šťávy bohaté na dusitan (≈ 6,2 mmol) přibližně 2,5 h před závodem. Plazmatický nitrit se více než zdvojnásobil, průměrný výkon vzrostl a časy na 4 km i 16,1 km se zkrátily o 2,8 % a 2,7 %. Důležité je, že spotřeba kyslíku zůstala stejná, což naznačuje zlepšení cyklistické ekonomie místo vyššího aerobního výkonu. Níže najdete protokol, výsledky i omezení studie.

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