Pelvis rotates as the leg lifts
Core stability is insufficient; the pelvis must stay square throughout the raise.
Overactive muscles
Hip flexorsErector spinae
Corrective work
Foam RollHip flexors↗StretchHalf-kneeling hip flexor stretch↗Mobility · Lower Body
Active Straight Leg Raise (ASLR)
Coaching cues
- Lie supine; lift one leg as high as possible while keeping it straight
- The opposite leg stays flat on the floor; do not allow the pelvis to rotate
- Measure and note the angle; a fundamental movement screen for hamstring and hip mobility
- Active version — no strap or assistance; pure hamstring and core control
Common faults 2
Opposite leg rises off the floor
The anchored leg must stay flat; rising means the hip flexor of the lifting leg is dominating.
Overactive muscles
Hip flexorsRectus femoris
Corrective work
Foam RollHip flexors↗StretchSupine Hip Flexor Stretch (Thomas Position)↗