#cardiovascular health

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A sunlit, minimalist kitchen counter in a modern home, photographed from a slightly elevated three-quarter angle with soft natural morning light spilling in from a window on the left. In the center sits a matte white ceramic mug of black coffee with a thin curl of steam, beside a small glass jar of deep magenta beetroot powder with a wooden scoop resting on the lid. A scattering of fine crimson powder dusts the pale oak surface in an artful, casual swirl. Nearby, a halved raw beetroot reveals vivid concentric rings of purple and pink, next to a few roasted coffee beans and a neatly folded charcoal gym towel. In the soft-focus background, a pair of clean white running shoes and a stainless steel water bottle sit on a floating shelf, hinting at a pre-workout routine. A single sprig of green beet leaves adds a fresh accent.

The color palette is warm and editorial: creamy neutrals, espresso browns, and rich beet magenta, with gentle highlights and long soft shadows. The composition has generous negative space on the right side for headline text, shallow depth of field, and a crisp, tactile texture on the ceramic, powder, and wood grain. The mood is calm, health-conscious, and contemporary, like a lifestyle feature in a premium wellness magazine or a trendy nutrition journal. Clean, balanced, natural, with subtle film-like grain and a slightly muted, high-end finish.

Kofein u predtreningu učvršćuje arterije, a cikla to poništava

BY DR. GYMBRO · 26. lis 2026.

Nedavno randomizirano crossover ispitivanje otkrilo je da doza kofeina (6 mg/kg) uzimanja prije treninga povećava pokazatelje arterijske ukočenosti već nakon 2,5 sata. Kad je uz kofein dodat prah od cikle s 400 mg nitrata, ti pokazatelji su se vratili na razinu placeba. Krvni tlak i funkcija endotela nisu se promijenili, pa se radi o suptilnom učinku, a ne o alarmantnom signalu. Studija je obuhvatila samo 24 zdrava mlada odrasla pojedinca i jednokratnu dozu, što ostavlja velika pitanja o dugoročnoj upotrebi i učinku kod starijih ili hipertenzivnih osoba. Evo što podaci pokazuju, što ne pokazuju i kako razmišljati o tome ako se oslanjate na kofein prije treninga.