Giridharan, Selvaraj, et al. “The Impact of Yoga on Heart Rate Variability: A Systematic Review of Randomized Controlled Trials ”. International Research Journal of Ayurveda & Yoga, vol. 7, no. 12, Dec. 2024, pp. 30-41, https://doi.org/10.48165/IRJAY.2024.71205.