Lumbar hyperextends on the throw
Lower back extends dramatically as a counterbalance to the throw.
Overactive muscles
Erector spinaeHip flexors
Corrective work
Foam RollHip flexors↗StretchHalf-kneeling hip flexor stretch↗Plyo · Full Body
Med Ball Overhead Throw (Slam Variation)
Coaching cues
- Stand facing a wall; hold ball overhead with both hands
- Throw the ball at the wall as hard as possible — full body power
- Follow through; catch the rebound immediately
- Power comes from the trunk and hips — not just the arms overhead
Common faults 2
Only arms generate the throw
Hip and trunk extension don't contribute; power output is halved.
Overactive muscles
Anterior deltoidUpper trapezius
Corrective work
Foam RollUpper traps↗StretchLevator scapulae stretch↗