This result was in accordance with the findings that stress could impair drip loss in meat (Huff-Lonergan and Lonergan, 2005). As confirmed by Huff-Lonergan et al (Huff-Lonergan and Lonergan, 2007), as meat pH reaches the isoelectric point, meat loses more water as drip loss increases. This occurs because the pH has an impact on the ultrastructure of muscle and on the state of denaturation of key muscle proteins. Protein solubility is minimum if the muscle pH is at or near its isoelectric point and then attain a net charge of near zero and thus loss their ability to attract and bind water.