#muscular endurance

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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.

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

BY DR. GYMBRO · 16. 10. 2026

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.