Most warm-up routines cover the basics… a bit of jogging, some arm circles, maybe a quad stretch. What they typically miss is the one area that matters most for almost every lower body movement: the hip flexors.
The Samson stretch is one of the most efficient ways to address this, combining a deep lunge with an overhead reach to simultaneously stretch the hip flexors, open the thoracic spine, and activate the glutes, all in a single movement.
It’s a staple in CrossFit warm-ups and functional fitness classes for good reason, and it takes less than two minutes to include in any training session.
Although the movement looks quite straight forward, there are some important, and quite subtle, things to consider when you’re moving through the stretch.
This guide outlines everything you need to know, including a video demonstration of the exercise, muscles worked, benefits and things to consider.
What is the Samson Stretch?
The samson stretch is a lunge exercise that targets several muscle groups, from the quads, glutes and hip flexors, to the calves, hamstrings and shoulders. The stretch is performed by lunging forward with one leg and maintaining straight arms overhead.
It is popular in CrossFit and functional workout classes, as a way to prime your body for all sorts of movements.
Strengthening the Psoas Muscle and Hip Flexors
The samson stretch is a great way to stretch out your psoas muscles. If you want to strengthen this muscle group too, our guide on how to do psoas marches is worth checking out, as an effective exercise to strengthen the hip flexors.
How to Perform the Samson Stretch
To do the Samson Stretch:
- Start in a standing position with a straight back and head pointing forward.
- Clasp your hands together, fingers interlaced, above your head, keeping your arms straight.
- Step forward with your left leg into a lunge position with your knee bent at 90°, lowering your right knee to the ground.
- The front shin should to be vertical. Try and drive your waist forward to create that deep stretch in the hips.
- Brace your core to help provide stability during the movement.
- Hold position for 3 seconds.
- Return to the original standing position.
- Repeat on the other side, lunging with the right leg.
Coach’s Tip – You’ll notice in the video demonstrate, the athlete leans to either side slightly from the upright position. This is a simple way to stretch out your lats and back at the same time. Similarly, you could include a rotation of the torso too.
Muscles Worked
The samson stretch will work a number of key muscle areas, including the hip flexors (front), the glutes (gluteus maximus), core, hamstrings and quads. The exercise also engages the biceps, calves as well as the shoulders.
If you include a slight lean to either side, it can also help engage the lats too.
Hip Flexors
The hip flexors, primarily the psoas major, iliacus, and rectus femoris, are the primary target.
As you sink into the lunge with the pelvis tucked and the back leg extended, the hip flexors of the trailing leg are placed under a deep, controlled stretch. These muscles are chronically shortened by prolonged sitting, which is why this stretch tends to feel immediately impactful for most people.
Gluteus Maximus
The glutes play an active role rather than a passive one. The gluteus maximus on the lead leg contracts to stabilise the hip and hold the lunge position, while the glute on the trailing leg engages to maintain hip extension and the posterior pelvic tilt that deepens the hip flexor stretch.
This co-contraction between the glutes and hip flexors is what makes the Samson stretch more effective than a standard static lunge stretch.
Quadriceps
The quads are engaged on the lead leg throughout the movement, working to maintain the 90 degree knee position and stabilise the front of the lower body.
Latissimus Dorsi and Thoracic Spine
The overhead arm position places the latissimus dorsi under a meaningful stretch, improving shoulder flexion range of motion and encouraging thoracic extension. This is one of the qualities that sets the Samson stretch apart from a standard lunge, the overhead reach simultaneously addresses upper body tightness that often accompanies the hip flexor restrictions that develop from desk work and sedentary habits.
Core
The abdominals and deep stabilising muscles, including the transverse abdominis and multifidus, work throughout the movement to maintain a neutral spine and prevent excessive lower back arching.
Active core engagement is what keeps the stretch targeted at the hips rather than being absorbed by the lower back.
Hamstrings and Calves
The hamstrings and calves of the trailing leg are also stretched during the movement, contributing to the full anterior and posterior chain lengthening that makes this a genuinely efficient warm-up tool.
The Benefit of Your Hands Overhead
The reason why the samson stretch is often so highly rated is the way it naturally encourages a straight back. This is due to the requirement of holding your hands overhead. This avoids rounding your back and adopting poor posture during a lower body stretching routine. This really helps to open up the hips.
Benefits of Samson Stretch
Increases Hip Flexibility
The Samson stretch directly targets the hip flexors in a deep, loaded position that many standard stretches don’t reach.
Research has found that improvements in hip flexor length are associated with meaningful reductions in lower back pain and disability, with the hip flexors’ origin from the lumbar spine explaining their direct influence on pelvic position and spinal mechanics.
Stretching this muscle group consistently keeps the pelvis in a more neutral position, which has downstream benefits for posture, movement quality, and lower back health.
Improves Mobility
The extension of the legs into a lunge (a dynamic movement), while in a upright position, provides an opportunity to strengthen key muscles in the lower back and hip areas, thereby improving joint mobility.
As opposed to just working on flexibility, including mobility exercises as well, is what can really create purposeful movement in this region. Mobility is the ability for a joint (in this case, the hip joint) to move through its full range of motion. If muscles around this joint are weak or tight, mobility and movement is subsequently limited.
Strengthening the Lower Body
The fundamental movement of a samson stretch is a forward lunge. This means with each repetition, you are working the muscles in the lower body (quads, glutes and hamstrings) to perform this lunge.
This makes it a great exercise not only for athletes and those looking to improve their hip mobility and movement, but also for those who perhaps don’t do much exercise and want simple bodyweight movements they can do at home.
The movement also requires unilateral strength in the lower body, as each leg is challenged separately. This helps avoid developing muscular imbalances and is an effective part of balance training.
Wakes Up Muscles
The samson stretch is a dynamic stretch… yet it also includes a pause (static stretch), which means it packs a punch in terms of switching on and waking up your muscles. It both stretches muscles passively, but also works on improving mobility actively, making it a great way to prime the body for exercise.
Reduces Lower Back Pain
Research has found that tight hip flexors are associated with increased erector spinae activation, reduced gluteus maximus activation, and reduced spinal endurance, all of which contribute to lower back pain and dysfunction.
By improving hip flexor length through regular stretching, the Samson stretch helps restore more natural pelvic mechanics and reduce the compensatory lower back tension that typically follows.
A study published in the International Journal of Sports Physical Therapy found that a daily lunge-and-reach stretching intervention, essentially the movement pattern of the Samson stretch, produced measurable improvements in hip flexor flexibility and gluteal function simultaneously.
Allows Flexibility in Workouts
As no equipment is needed to perform the samson stretch, it’s easy to include it in any lower back stretch exercise programme. This stretch aims at facilitating everyday activities such walking uphill, running and stretching upwards.
Things to Consider
As with any stretch exercise, it is important to be aware of performing the movements slowly and in a controlled manner.
The key focus, therefore, is not performing the movements too rapidly, potentially causing strain, tension or pain to hip or lower back areas.
When extending the leg into a lunge, it is essential not to extend the leg too suddenly and not put the hip flexors under pressure.
Remember, when performing the samson stretch, there should be no tension felt in the upper leg or lower back areas. If you feel any strain, tension or pain in these areas, then you should stop this exercise.
The fact that the arms are outstretched in the vertical position can cause some discomfort. Limited mobility in the shoulders may be impacting this, in which case, this is something to work on. Thoracic mobility exercises can help improve mobility in this region.
You may also find a movement like the world’s greatest stretch is a useful stretch to do alongside the samson stretch as far as loosening up the hips and back.
The most common mistake when performing the Samson stretch is allowing the lower back to arch, which shifts the stretch away from the hip flexors and into the lumbar spine. Before sinking into the lunge, consciously tuck the pelvis under and squeeze the glute on the back leg.
If you can’t feel a meaningful stretch through the front of the hip after doing this, step the front foot further forward to increase the range. Everything else in the technique is secondary to getting this right.
Bottom Line
The Samson stretch is one of the most efficient movements you can include in a warm-up. In a single exercise, it addresses hip flexor tightness, activates the glutes, opens the thoracic spine, and builds unilateral lower body stability, making it considerably more valuable than its simple appearance suggests.
For warm-up use, aim for 6 to 8 breaths per side and keep the total stretch duration under 2 minutes to avoid any impact on performance in the session that follows. Focus on the pelvic tuck and glute squeeze before sinking into the stretch, without these cues the movement loses much of its effectiveness.
Done consistently as part of a pre-training routine, it can make a genuine difference to hip mobility, lower back comfort, and overall movement quality over time.
Related Articles
How to Build Muscle While Traveling