2.5 h
https://www.youtube.com/watch?v=c3BVYeZxKnYIf you can sit in a posture stable and comfortable for two and a half hours then we say you have attained to asana siddhi that you are in absolute comfort and at ease in a particular posture.
https://www.youtube.com/watch?v=1yQ92u8sWfYBEYOND ASANA: Why sit for 2.5 hours? Asana Siddhi
https://www.classicyoga.co.in/2020/11/asana-siddhi/Once a Yogi can sit in a posture steadily without any effort for a duration of three hours, he is said to have attained Asana Siddhi. However, advanced Yogis can sit in a posture for days.
https://yoga-arogya-kendra.weebly.com/m ... sanas.html"you must be able to sit in one meditation asana for a full three hours at a stretch without the body shaking. Then only you will gain true asana siddhi (mastery over the asana) and be able to practice the higher stages of pranayama and dhyana. Without securing a steady asana, you cannot progress well in meditation.
https://www.yogicwayoflife.com/padmasan ... editation/One attains Asana Siddhi if one sits in a posture for three and half hours.
https://nepalyogahome.com/one-asana-hack/Ancient yoga system states -If you can stay in any asana for 3 hours 36 minutes easily being absolutely comfortable (in a stable manner without movement), this is asana siddhi. However, Sadaguru has reduced its time limit to 2.5 hours.
http://www.binaryintellect.com/articles ... 3ae13.aspxAt the end of culmination of the Asanas one is expected to attain what is known as Asana Siddhi or Asana Jaya. Asana Siddhi when the practitioner can maintain a posture for 12 hours at a stretch. Asana Siddhi is usually attained for meditative postures such as Siddhasana, Padmasana, Swastikasana and Vajrasana.
???