International Journal of Yoga
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   Table of Contents     
Year : 2012  |  Volume : 5  |  Issue : 2  |  Page : 157
Yoga, mental health and salivary amylase

Wiwanitkit House, Bangkhae, Bangkok, Thailand

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Date of Web Publication9-Jul-2012

How to cite this article:
Wiwanitkit V. Yoga, mental health and salivary amylase. Int J Yoga 2012;5:157

How to cite this URL:
Wiwanitkit V. Yoga, mental health and salivary amylase. Int J Yoga [serial online] 2012 [cited 2022 Aug 16];5:157. Available from:

I read the recent publication on yoga and mental health with great interest. [1] Gururaja et al. concluded that "yoga has both immediate and long-term effects on anxiety reduction". [1] I agree that yoga has good effect on mental health. However, I have a concern on the technique for verification of the result in this study. The authors used the salivary amylase measurement and further extrapolated it to mental health. Indeed, there are many considerations on salivary amylase measurement in this work. First, there is no data on quality control and control of confounding factors. Control of measurement technique, eating behavior as well as underlying oral pathology are important things to be discussed. [2] Second, although salivary amylase might be feasible to use as an indicator for stress, it implies acute stress not the mental health. The use of cortisol might be better.

   References Top

1.Gururaja D, Harano K, Toyotake I, Kobayashi H. Effect of yoga on mental health: Comparative study between young and senior subjects in Japan. Int J Yoga 2011;4:7-12  Back to cited text no. 1
2.Okabe H, Uji Y, Netsu K, Noma A. Automated measurement of amylase isoenzymes with 4-nitrophenyl-maltoheptaoside as substrate and use of a selective amylase inhibitor. Clin Chem 1984;30:1219-22.  Back to cited text no. 2

Correspondence Address:
Viroj Wiwanitkit
Wiwanitkit House, Bangkhae, Bangkok, 10160
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/0973-6131.98245

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