Extension-based mechanical low back pain (lumbar facet irritation)

What it is

The back of your spine has small paired joints (facet joints) that stack one vertebra on the next, plus thick muscles running either side of them. When you arch, those joints close down on each other and take load directly, and irritation of that joint capsule and the muscles around it is one cause of this pain pattern. It is not the only one. A pars stress reaction, the early stage of the spondylolysis filed separately in this library, produces the same one-sided arching pain and cannot be separated from facet irritation by how it feels or by whether it warms up. That distinction is a clinician’s to make, not yours, and it matters most in a player who is still growing, where a missed bone stress injury is the one that costs a season.

How volleyball causes it

The cocking phase of the spike is a loaded arch. As the hitter reaches peak height, the trunk extends, rotates away from the hitting arm and side-bends, forming a C shape, and then reverses that whole shape violently to whip the arm through. A hitter takes 100 to 300 of those a session, and every one of them ends with the lumbar facets slammed to end range. Jump serving is the same shape with more air time and a harder finish, back-setting adds a deliberate arch with no approach to absorb it, and landing off a block with the hips already ahead of the shoulders gives you one more compressed extension per rep.

AttackingServingBlockingSetting

What it feels like

• Pain on one side of the low back, an inch or two off the midline, that you can point to with a finger
• Worse when you arch, reach for a ball above and behind you, or lie face down
• Better when you sit, bend forward, or pull your knees to your chest
• Sore and stiff the morning after a heavy hitting or serving day, loosens up once you move
• Pain builds through practice rather than warming up and disappearing
• Often shows up on the side opposite the hitting arm in right-handed hitters, though either side is common

Stop and get it seen if

• You are still growing (roughly under 18) and the pain has not clearly improved in two to three weeks, which means a bone stress injury has to be ruled out before anyone calls this muscular
• Pain, numbness, pins and needles or weakness running down a leg, or any change in bladder or bowel control
• Pain that wakes you at night regardless of position, or comes with fever, night sweats or unexplained weight loss
• Back pain that started with a fall, a collision or landing on someone's foot, rather than building up over sessions
• You are still growing and the pain is one-sided and arching-related. In a growing player this is treated as a possible pars bone stress injury until a clinician says otherwise.

What recovery usually looks like

Stages, not a schedule. Everyone moves through these at their own pace, and the ranges are wide because real recoveries are.

1. 1. Settle the irritation

   3 days to 2 weeks

   Get pain out of walking, sitting, sleeping and school before anyone thinks about volleyball.

   • Can stand, walk and roll over in bed without a sharp catch
   • Morning stiffness lasts minutes rather than the whole first hour
   • Arching still reproduces the pain, and that is expected at this stage
   • Pain has stopped spreading and stays in the one spot

2. 2. Build the front and free the hips

   2 to 6 weeks, overlapping the first phase

   Give the arch somewhere else to come from, so the low back stops being the only hinge.

   • Can hold a front plank and a dead bug position without the low back complaining
   • Can reach both arms overhead standing against a wall without the ribs flaring and the low back arching to get there
   • Hip flexor stretching feels like a stretch rather than a pinch in the back
   • Everyday bending and lifting is pain free

Ready to play again when

• Standing back bend to full range with no sharp pain
• Standing on one leg and arching (the stork position) is pain free on both sides
• Full approach, swing and landing repeated at practice volume with no increase in pain the next morning
• A full session of hitting with no loss of swing height in the last twenty minutes

Keeping it from coming back

This is ordinary training, so unlike the rest of this page it does tell you what to do.

• Dead bugs and their progressions, done with the low back flat and the ribs pulled down. This trains the front of the trunk to resist the arch, which is exactly its job in the cocking phase.
• Half-kneeling hip flexor stretch and couch stretch on both sides. A short psoas and rectus femoris tips the pelvis forward and forces the arch to come from L5 instead of the hip.
• Thoracic extension over a foam roller and open-book rotations. If the upper back can extend and rotate, the arch is shared across ten segments rather than dumped into two.
• Side plank and Pallof press for the sides of the trunk, which control the side-bend and rotation half of the C shape.
• Hip thrusts and Bulgarian split squats. Strong glutes finish the jump and absorb the landing so the low back is not the shock absorber.
• Count hard swings and jump serves across club, school, beach and open gym combined, and avoid stacking two maximum hitting days in a row.