Yoga is a mind-body discipline that has been linked to improved cardiac autonomic function among other health advantages. The immediate impact of various yoga postures on the heart autonomic rhythm in young, healthy people is still unknown. Methods: To examine the immediate effects of four different yoga positions (Mountain, Triangle, Warrior II, and Tree) on the cardiac autonomic rhythm, a randomized controlled experiment was carried out on 50 young, healthy volunteers. A heart rate monitor was used to measure the heart rate variability (HRV) characteristics both before and right after the yoga poses were executed. Results: The HRV parameters considerably increased in all four yoga postures, proving improved cardiac autonomic function. The Triangle, Warrior II, and Tree stances were followed by the Mountain pose, which had the greatest rise in the HRV parameters. Conclusion: In conclusion, performing yoga positions can improve one's heart rate variability (HRV) parameters immediately in young, healthy people. The mountain pose showed the largest improvement.