'I’m a 59-year-old yoga teacher: If I had to choose one stretch to do every day, it would be this one'

If you sit for long stretches during the day, chances are your hips and hamstrings will feel tight. It’s one of the most common mobility complaints I hear about as a trainer, especially from people who spend hours at a desk, behind the wheel, or who are training for long-distance running or cycling events.

That’s why I asked a 59-year-old yoga teacher which single stretch she’d choose if she could only do one every day. Her answer? Janu Sirsasana, also known as the "head-to-knee pose."

“Janu Sirsasana offers remarkable versatility and benefits all in a single pose,” explains Lauren Kearns, yoga teacher and founder of Lauren’s Vibe Pilates, LLC. “It lengthens the hamstrings (and spine) of the extended leg while gently opening the hip through the bent leg.”

Read on to learn how to do the stretch correctly and why it’s worth doing every day.

What is the exercise?

This one simple stretch addresses several areas that tend to become restricted in modern life, particularly the posterior chain and hips, which tighten after long periods of sitting and can quietly limit your squats, flexibility and overall movement.

But the benefits aren’t just physical. “The forward-folding action encourages the breath to slow and the mind to settle,” Kearn says. “It invites a moment of introspection, making the pose both physically beneficial and mentally calming.”

Janu Sirsasana is often translated as "head-to-knee forward bend," so many people think of it simply as a forward-folding posture, but it’s much more. It’s a seated forward fold where one leg remains extended while the other bends, allowing the sole of the foot to rest against the inner thigh.

This position creates a deep stretch through the hamstrings of the extended leg while opening the hip of the bent leg. At the same time, the forward fold lengthens the spine, stretches the lower back and encourages slower, deeper breathing. Breathwork can help digestion and may assist in relieving mild anxiety in some people.

The great thing is that you don’t need any special equipment for this stretch, but practicing on one of the best yoga mats can make the pose more comfortable on your sitting bones, while making the pose feel more intentional.

How to do head-to-knee forward bend

Follow these steps:

• Sit upright with both your legs extended in front of you
• Bend your left knee and place the sole of your left foot against your inner right thigh
• Lengthen your spine and sit tall
• Inhale and reach both arms overhead to create space through your torso
• Exhale and hinge forward from the hips, folding toward the extended leg while keeping your spine long
• Rest your hands on your shin, ankle, or foot, or wherever you can maintain length through the spine without strain
• Take three to five slow breaths, then return to upright and repeat on the other side.

If you have tight hips, this pose is particularly challenging. One simple fix is to sit on a yoga block, which can open up the whole pose. Sometimes it’s better not to fold, either. Simply sit upright and focus on opening your hip. When you feel ready, you can try lowering forward in stages.

“Janu Sirsasana starts with how you sit, not how far you fold,” says Kearns.

What are the benefits?

This pose works several areas of the body at once, which is why many yoga teachers, including Kearns, consider it a staple stretch.

First, it improves hamstring flexibility, helping counteract the tightness that develops from sitting for long periods and performing exercises like deadlifts or hamstring curls. The forward fold also lengthens the spine and stretches the back, which can help relieve tension in your lower back and encourage better posture.

Because one knee is bent, the pose gently opens the groin and hip joint, stretching the internal and external rotators, which are muscles that often become restricted in everyday life.

Then there’s the calming effect; forward folds naturally slow the breath, which can help reduce stress and create a sense of mental stillness, which is something most of us could benefit from!

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