So increasing intramuscular water alone makes you stronger, interesting. I know off cycle reguardless of training, strenght goes away, didnt think it was due to the water.
Thanks
Absolutely, remember many steroids also increase intracellular water levels.
There was a study done recently where the researchers found bodybuilding-type resistance training leads to a chronic increase in intracellular fluid statues. Why is this important? There is are previous studies (Haussinger, 1996; Haussinger et al., 1993; Millar et al., 1997). showing that cell swelling via increased intracellular hydration results in marked increases in protein synthesis and reductions in protein degradation. These findings have been shown in a wide variety of cell types, implying that keeping muscle fibers hydrated may actually increase contractile hypertrophy and thus enhance strength. This is partially why GH, insulin and testosterone are combined and why many of us use protein and carbs before training. You are actually utilizing the higher reps to supersaturate the muscle cell with water, glycogen and amino acids while you train.
Further, we know that fast-twitch fibres (Type II) are particularly sensitive to osmotic changes, presumably related to a high concentration of water transport channels called aquaporin-4. (Frigeri et al., 1998).
Ribeiro AS, Avelar A, Schoenfeld BJ, Ritti Dias RM, Altimari LR, Cyrino ES. Resistance training promotes increase in intracellular hydration in men and women. Eur J Sport Sci. 2014 Jan 28.
Abstract
The main purpose of the present study was to investigate the effect of 16 weeks of resistance training (RT) on body water in men and women. Thirty men (22.7 ± 4.4 years, 68.4 ± 9.0 kg and 174.5 ± 6.6 cm) and 34 women (22.7 ± 4.1 years, 58.8 ± 11.9 kg and 162.6 ± 6.2 cm) underwent progressive RT for 16 weeks (2 phases, 8 weeks each), 3 times per week, that consisted of 10–12 whole body exercises with 3 sets of 8–12 repetitions maximum. Total body water, TBW (intracellular water, ICW and extracellular water, ECW compartments) and skeletal muscle mass (SMM) were assessed using a spectral bioelectrical impedance device (Xitron 4200 Bioimpedance Spectrum Analyzer). TBW, ICW compartment and SMM increased significantly (P < 0.05) over time in men (+7.5%, +8.2% and +4.2%, respectively) and women (+7.6%, +11.0% +3.9%, respectively), with no sex by time interaction (P > 0.05). We conclude that progressive RT promotes an increase in body water, principally by intracellular content; however, the hydration status is not influenced by sex.
References
Frigeri, A., Nicchia, G. P., Verbavatz, J. M., Valenti, G., & Svelto, M. (1998). Expression of aquaporin-4 in fast-twitch fibers of mammalian skeletal muscle. The Journal of Clinical Investigation, 102, 695–703. doi:10.1172/JCI2545
Haussinger, D. (1996). The role of cellular hydration in the regulation of cell function. The Biochemical Journal, 313(Pt 3), 697–710.
Haussinger, D., Roth, E., Lang, F., & Gerok, W. (1993). Cellular hydration state: An important determinant of protein catabolism in health and disease. The Lancet, 341, 1330–1332. doi:10.1016/0140-6736(93)90828-5
Millar, I. D., Barber, M. C., Lomax, M. A., Travers, M. T., & Shennan, D. B. (1997). Mammary protein synthesis is acutely regulated by the cellular hydration state. Biochemical and Biophysical Research Communications, 230, 351–355. doi:10.1006/bbrc.1996.5959