Is sitting on the floor or sitting on a chair better for long meditation sessions?

Namaste Ramesh. It is wonderful that you are prioritizing long sessions, but remember: meditation is a journey for the mind, not a punishment for the knees. Born on July 3, 1984, in Indore, your chart features a strong Saturn (Shani) influence. Saturn governs the bones, joints, and the "structure" of the body. When you force yourself to sit on the floor despite pain, you are triggering your nervous system's "Danger Signal." The physical pain in your back and knees acts as a "Rahu-distraction," making your mind race to escape the discomfort. Detailed Solution & Strategic Path: For long sessions, sitting on a chair is perfectly acceptable and often superior if floor-sitting causes pain. The Posture Rule: The most important factor for focus is a Straight Spine. If sitting on the floor causes you to slouch or lean, the "Prana" (life force) cannot flow up the Sushumna Nadi (central channel). Focus vs. Pain: Pain spikes cortisol. When you sit on a chair, your body feels "Safe." This safety allows the brain to transition from the "Beta" (stress) state to the "Alpha" (meditative) state much faster. Detailed Remedies: Remedy: Sit on a firm chair with your feet flat on the ground. Place a small cushion behind your lower back to maintain the natural curve. Vedic Exercise: Before sitting, practice "Sukshma Vyayama" (joint rotations) to release the stagnant energy in your knees. Mantra: Chant "Om Sham Shanaishcharaya Namah" 11 times before you begin to stabilize your Saturnine physical structure.