The 'astronaut workout' scientists say can cure back pain and reverse aging

Both space and ageing can cause atrophy of a "forgotten" muscle.
Nature

The relationships between physical activity, lumbar multifidus muscle morphology, and low back pain from childhood to early adulthood: a 12-year longitudinal study

We investigated the longitudinal associations between physical activity (PA), lumbar multifidus morphology, and impactful low back pain (LBP) in young people. Nine-year-old children were recruited ...
Nature

Relationship between facet joint osteoarthritis and multifidus fat infiltration in patients with lumbar spondylolisthesis

Lumbar facet joint osteoarthritis (FJOA) represents a significant aspect of zygapophyseal joint degeneration 1. Evidence indicates that facet degeneration may occur early, sometimes even preceding ...