The most common mistakes include allowing knees to extend too far past the toes, which can stress the knee joints, and rounding or over-arching the lower back, which puts undue strain on the spine. Another frequent error is shifting weight onto the balls of the feet, causing heels to lift and destabilizing the pose. Additionally, many people tend to shrug their shoulders towards their ears, creating unnecessary tension. To correct these, focus on sitting back as if into an imaginary chair, engaging your core, pressing through your heels, and relaxing your shoulders down and back.

You can tell your Chair Pose form is correct if you feel strong engagement in your quadriceps and glutes, as if you're actually sitting deeply into a chair. Check your knees: you should be able to look down and see your toes past your knees, indicating your hips are sitting back. Your core should be engaged, supporting a relatively neutral spine without excessive rounding or arching, and your chest should be lifted. Your weight should be evenly distributed or slightly biased towards your heels, not primarily on your toes.

Poor form in Chair Pose can lead to several injuries. Knee pain or patellofemoral syndrome can result from the knees tracking too far forward past the toes, placing excessive stress on the knee joint. Lower back strain or discomfort can occur from rounding the lumbar spine or excessively arching it, compromising its natural curve. Moreover, neck and shoulder tension or strain can develop if the shoulders are shrugged up towards the ears for prolonged periods. Maintaining proper alignment helps prevent these issues by distributing the load correctly and strengthening supportive muscles.

Chair Pose doesn't typically involve external weights, but you can think of 'reducing intensity' or 'modifying depth.' Yes, it is highly recommended to prioritize correct form over how deep you can go into the pose or how long you hold it. If you find yourself compensating with poor alignment (e.g., knees too far forward, back rounding, heels lifting), reduce the depth of your squat. Focus on holding a less deep but perfectly aligned pose, engaging the correct muscles, and building strength gradually before attempting to deepen the pose.

To improve your Chair Pose form at home, practice against a wall: stand a few inches from the wall, then sit back until your tailbone gently touches it, helping to teach the 'sitting back' motion. Use a mirror to observe your form from the side, paying attention to your knees, spine, and shoulder alignment. Focus on core engagement by actively drawing your navel towards your spine throughout the pose. Additionally, warm up your quads and hips before practicing, and incorporate hip mobility exercises to aid in achieving better depth and alignment.