A, 100% cotton, size-less common warp was used to study the real- time tensions of single strands of the warp during weaving on a high-speed weaving machine. The machine was operated under almost mill-like conditions. However, in order to investigate the independent effects of the weaving speed and fabric construction on the tension behavior/fluctuations of individual warp yarns, the speed was varied, in steps, from 250 to 550 picks (the machine's maximum speed possible) per minute and the pick density was varied from 20 to 50 picks (standard pick density) per minute, while maintaining the same twill-weave structure. Analyses of the single-strand (SS) real-time, dynamic tensions computed online revealed: 1) tension fluctuations within a weaving cycle ; 2) tension variations among different strands of the warp; and 3) overall tension fluctuations and variations caused by the different weaving speeds and fabric constructions (pick densities). Results showed that the SS tension varied from a minimum 20 g (when the shed was level) to almost 100g at the (beat-up) peak. Further, variations among different strands in the body of the warp were not significant, showing that the original, inherited “virgin” tension of the warp on the loom beam was uniform and consistent. Furthermore, the dynamic yarn tensions were considerably influenced by the basic ground warp tension (~ 100 kgf) and the pick density. The weaving speed did not have much influence either on the absolute tension value or on its fluctuations within a weaving cycle. This manuscript describes the test results, along with the experimental set-up that included a state-of-the-art yarn tension meter, computer, and accessories, and the various on-line tension graphs obtained.