Side Lunge Stretch
What Is the Side Lunge Stretch?
Side Lunge Stretch is an isolation exercise that primarily targets the hips and groin, lengthening the adductor muscles along the inner thigh of the straight leg while the bent leg holds you up. It is a beginner-level movement, held for time as a static stretch, in which you stand in a wide stance, bend one knee and sit your hips toward that side while the other leg stays straight with the foot flat on the floor.
It is one of the most common standing groin stretches in gyms and team-sport cooldowns because it needs no equipment, no mat and no getting down onto the floor. Like other long static holds it fits best after training or in a separate mobility session. Before training, keep the holds short or shift slowly from side to side instead, and save the full-depth, moving version for the Cossack Squat, which moves in and out of the bottom position for reps and builds strength through the range rather than holding a stretch.
The straight leg does the stretching. Its hip is spread wide while staying close to straight, and its knee is straight, so the stretch falls on the adductor longus high on the inner thigh and on the gracilis, the one inner-thigh muscle that also crosses the knee. That makes it a natural partner to the Butterfly Stretch, where both hips and knees stay bent. Standing wider or sitting lower deepens the stretch. Hinging your chest forward from the hips with a long back adds hip bend, and an elastography study of 16 healthy men found the rear part of the adductor magnus was stretched when the leg was spread as far as it would go with the hip bent 30 to 90 degrees, but not with the hip straight, so the forward hinge moves some of the stretch toward the back of the inner thigh. Meanwhile the bent leg's quadriceps and glutes work to hold the lunge, so the lower you sit, the more the stretch doubles as a leg-strength hold.
The stretch suits anyone whose inner thighs feel tight when squatting wide, skating, or moving side to side, and people who find floor stretches hard on the knees or hard to get into. If holding the lunge tires the bent leg before you feel the stretch, stay higher and rest your hands on the bent thigh, or take the weight off completely with the Lying Adductor Stretch. Flexibility alone does not protect the groin from strains; adductor strength work such as the Copenhagen Plank does more of that job, so treat this stretch as a complement to strengthening, not a replacement.
Muscles Worked
- Adductor Longus
- Primary
- Adductor Magnus
- High
- Vastus Lateralis
- High
- Vastus Medialis
- High
- Gluteus Maximus
- Medium
- Rectus Femoris
- Medium
- Semimembranosus
- Minimal
- Semitendinosus
- Minimal
Instructions
- Stand tall with your feet about twice shoulder-width apart and your toes pointing forward or turned out slightly.
- Clasp your hands together in front of your chest with your elbows out to the sides.
- Shift your weight toward your right foot, bending your right knee and sitting your hips back and down toward that side.
- Keep your left leg straight with the whole foot flat on the floor and the toes pointing forward.
- Lower until you feel a steady stretch along the inside of your left thigh, keeping your right knee in line with your right toes and your right heel down.
- Keep your chest lifted and your back long, leaning forward only slightly from your hips.
- Hold still for 15 to 30 seconds, breathing slowly and letting your hips settle a little lower as the stretch eases.
- Press through your right foot to return to the center, then repeat on the other side, doing two to four holds on each side.
Common Mistakes
Bent knee caving in
Letting the bent knee drift inward past the toes twists the knee, so keep it pointing the same way as the foot throughout the hold.
Heel lifting on the bent leg
Rising onto the ball of the bent foot shifts your weight into the knee and makes the position unstable, so keep the whole foot flat and sit your hips back.
Bending the straight leg
Letting the straight knee soften takes the stretch off the inner thigh, so keep that leg long with the foot flat and the toes pointing forward.
Forcing too wide a stance
Spreading the feet wider than your hips allow makes the groin feel sharp and the bent knee cave, so start moderate and widen only as the stretch eases.
Rounding the back
Collapsing the chest toward the floor rounds the lower back without adding stretch, so keep the chest lifted and lean only by hinging from the hips.
Bouncing at the bottom
Pulsing up and down to go deeper jolts the groin tendons, so ease into the depth you can control and hold it still.
Injuries
Side Lunge Stretch is a low risk exercise when performed with proper technique. It uses only your body weight, both feet stay on the floor, and you decide how low to go. The main strain point is the groin of the straight leg, where the adductor tendons attach to the pubic bone, especially if the stance is forced too wide or you bounce at the bottom. The bent knee comes next if it caves inward or the heel lifts, followed by the lower back if you round forward instead of hinging from the hips.
Start with a moderate stance and lower only until you feel a steady pull along the inner thigh. Keep the bent knee pointing the same way as its toes, keep both feet flat, and hold still rather than pulsing. If the bent leg tires or the knee complains, stay higher and rest your hands on the bent thigh or a sturdy chair, or switch to a floor stretch such as the Lying Adductor Stretch or the Butterfly Stretch. To progress, widen the stance a little, sit lower, add a small forward hinge from the hips, or lengthen the hold. When the static stretch feels easy, the Cossack Squat trains strength through the same range.
Stop if you feel sharp pain in the groin or over the pubic bone, pain inside or behind the bent knee, or a pinch at the front of the hip; a steady, dull pull along the inner thigh is the target. Anyone with a recent groin strain should keep the range small and pain-free until it heals, and anyone recovering from hip or knee surgery, including a joint replacement, should clear the position with their surgeon or physical therapist first. During pregnancy, pelvic girdle pain often hurts when the legs move apart, so use a narrower stance that stays pain-free or skip the stretch.
- Primary Focus
- Hips & groin
- Equipment
- Body weight
- Modality
- Stretching
- Difficulty
- Beginner
Alternative Exercises
Frequently Asked Questions
- Q: What is the difference between the Side Lunge Stretch and the Cossack Squat?
The Side Lunge Stretch is a static hold at a comfortable depth with the straight leg's foot flat, done to stretch the inner thigh. The Cossack Squat moves down to full depth and back up for reps, often shifting from side to side, and builds strength and control through the range, so it asks much more of the bent leg's hip, knee and ankle.
- Q: How does it compare with the Butterfly Stretch?
They stretch the inner thigh in different positions. The Butterfly Stretch keeps both hips and knees bent, while here the straight leg's hip stays near straight and its knee is straight, so doing both covers the inner thigh more completely than either one alone.
- Q: How long should I hold the Side Lunge Stretch?
Hold for 15 to 30 seconds on each side and repeat two to four times, so each side gets about 60 seconds in total. Older adults often do better with holds of 30 to 60 seconds, as long as the bent knee stays comfortable.
- Q: Should I do the Side Lunge Stretch before or after training?
Either works, but long static holds fit best after training or in a separate mobility session. Before training, keep the holds short or rock slowly from side to side, then move on to your dynamic warm-up.
- Q: Should the toes of my straight leg point up?
Not for this version, which keeps the whole foot flat with the toes pointing forward. Lifting the toes so only the heel stays down adds a stretch along the calf and is common in deeper, moving versions such as the Cossack Squat, but it is harder to balance in a long hold.
- Q: What if I cannot get low without my bent knee hurting?
Stay higher and rest your hands on your bent thigh or a chair, since the stretch comes from the straight leg spreading, not from how low you sit. If the knee still hurts, do the Lying Adductor Stretch instead, which stretches the same area with no weight on the knees.