What Is Potassium? Potassium is a mineral that, among other things, helps muscles contract, helps regulate fluids and mineral balance in and out of body cells, and helps maintain normal blood pressure by blunting the effect of sodium. Potassium also may reduce the risk of recurrent kidney stones and bone loss as we age.
Racking strength, simply explained, is the ability of a square or rectangular (wall) area to maintain its shape under duress. The picture below (from an old federal document testing racking strength) demonstrates what can happens with stress exceeds a wall's racking strength.acking strength, simply explained, is the ability of a square or rectangular (wall) area to maintain its shape under duress. The picture below (from an old federal document testing racking strength) demonstrates what can happens with stress exceeds a wall's racking strength.
The higher the number of repetitions you can actually perform with the chosen weight, the larger the error in the estimate of your 1-RM. 1-RM = (weight lifted)/[1.0278 â (repetitions x 0.0278)]. From: Brzycki, M. (1993). Strength testing-Predicting a one-rep max from a reps-to-fatigue.Journal of Physical Education, Recreation and Dance 64 (1) , 88-90. This relationship is based on the relatively linear relationship between repetition maximal scores and the percentage of the 1-RM. properly conducted maximum strength test will however be more accurate than the predicted strength from an equation. Endurance versus Strength The correlation between absolute strength and endurance has been reported to exceed 0.90 (de Vries, 1980; Invergo et. al., 1991).