Now, new studies from the Journal of the International Society of Sports Nutrition show that beta-alanine could also improve isometric contractions. When subjects were administered 6.4 grams of beta-alanine for four weeks, their maximal voluntary isometric-contraction strength improved. So taking beta- alanine will likely help with local muscle endurance and improved time under tension when in the gym, which can lead to greater muscle growth.
REFERENCE: Sale C, et al., J Int Soc Sports Nutr. 14;9(1):June 26, 2012.