#anaerobic performance

2 articles

A wide, cinematic landscape photograph of a freediver suspended mid-water in a calm, sunlit turquoise sea, shot from slightly below so the surface glimmers above like rippling silver glass. The diver wears a sleek matte black wetsuit and a long, elegant pair of carbon fins. Their body is streamlined, arms relaxed at their sides, head tilted slightly down in a state of serene focus. Shafts of soft golden sunlight pierce the water diagonally and illuminate fine floating particles and a trail of tiny bubbles rising from the diver's fins. A single thin dive line descends vertically into deeper blue at the right of the frame, adding a graphic compositional element.

In the lower left foreground, slightly out of focus, a minimalist still-life element rests on a pale sandy seabed: a small, clean white scoop with a mound of fine white powder, casually echoing creatine without any text or labels. The scoop is softly lit and has a shallow depth of field blur, creating a gentle visual link between supplement and sport.

The color palette is refined and modern: deep teal, aquamarine, soft cerulean, warm cream highlights, and touches of sunlit gold. The water gradients smoothly from bright, luminous turquoise near the top to a rich inky navy at the bottom, giving depth and a sense of quiet intensity. Leave generous negative space on the left third of the image for headline placement, with the diver positioned on the right third following the rule of thirds.

The mood is calm, athletic, and contemplative, like an editorial image from a premium health and science magazine. Style: high-end editorial photography, natural light, subtle film grain, soft contrast, crisp detail on the diver and gentle bokeh in the background. No text, no logos, no futuristic or sci-fi elements, no graphics overlays.

Kreatin pomáhá i při zadržení dechu: studie na freediverech

BY DR. GYMBRO · 27. 10. 2026

Kreatin je známý tím, že zvyšuje sílu a rychlost, ale může podpořit výkon i v momentě, kdy vůbec nedýcháte? Dvojitě zaslepená studie na trénovaných freediverech zjistila, že 7‑denní nasycovací fáze 20 g / den zvýšila celkovou práci a prodloužila čas do vyčerpání při cyklistickém testu s zadrženým dechu. Navíc byl v kreatinové skupině krevní laktát nižší než v placebu, což překvapuje. Přečtěte si, jak studie probíhala, kdo by z ní mohl těžit a proč je nutné realistické očekávání.

A wide, softly lit editorial flat-lay on a pale warm-gray stone countertop, shot from slightly above. On the left, a small rustic ceramic bowl in matte cream holds a handful of dried guarana seeds, dark glossy brown with pale cream arils, a few spilling onto the surface. Beside it sits a halved fresh guarana fruit in vivid red-orange, split open to show the white flesh and black seed inside, looking like a tiny eye. On the right, two open clear capsules rest side by side. One is filled with fine white caffeine powder, the other with a fine earthy brown guarana powder, and a little of each dusts the stone in delicate, deliberate lines. Between them, a minimalist matte-black espresso cup with a thin ribbon of steam rises on the right edge of the frame. A brushed-steel stopwatch and a slim dark-green linen notebook with a pencil sit in the upper background, slightly out of focus, to hint at performance testing without clutter. A few green leaves of a guarana vine curve in from the top-left corner, catching soft light.

The lighting is natural window light from the left, with gentle long shadows and a subtle warm highlight on the seeds. The palette is muted and modern: warm creams, terracotta red, deep espresso brown, sage green, and charcoal accents. The background is clean with generous negative space on the upper right for headline text. Shallow depth of field, crisp focus on the seeds and capsules, fine grain, and a calm premium magazine look like a contemporary wellness and sports-science journal. No people, no text, no logos, no futuristic elements.

science research

Guarana vs kofein: při stejné dávce zvedla jen guarana špičkový výkon

BY DR. GYMBRO · 22. 10. 2026

Stejná dávka kofeinu, ale různé kapsle – jen guarana přinesla statisticky významné zvýšení špičkového výkonu. V randomizované křížové studii na 18 aktivních mužích guarana zvýšila maximální výkon o 4 % oproti placebu, zatímco anhydrový kofein významný efekt neprokázal. V přímém srovnání však guarana nebyla statisticky lepší; rozdíly jsou pouze popisné. Níže se dozvíte, co čísla ukazují, jaké jsou omezení studie a jak dávkovat guaranu podle obsahu kofeinu, pokud ji chcete vyzkoušet.