If I could prescribe one thing that improves healing, reduces pain sensitivity, supports hormone balance, and costs nothing, it would be sleep — and it would be the prescription most patients take least seriously.
## What happens while you sleep
Deep sleep is when the body releases its largest daily pulse of growth hormone, a central driver of tissue repair. It''s when inflammatory regulation resets, when muscle protein synthesis consolidates the day''s training or therapy stimulus, and when the nervous system recalibrates pain sensitivity. Chronic short sleep does the opposite: higher baseline inflammation, impaired tissue repair, increased pain sensitivity, and measurably higher injury rates — in one well-known study of adolescent athletes, sleeping under eight hours nearly doubled injury risk.
## Why it matters for treatment outcomes
This isn''t just about recovery from workouts. The biology that determines whether a PRP treatment, a rehabilitation program, or a surgical repair succeeds runs on the same systems sleep governs. A patient investing in orthobiologic treatment while sleeping five hours a night is working against their own investment. When I talk about optimizing the terrain before treatment, sleep is near the top of the list.
## The practical targets
For most adults the evidence points to seven to nine hours, with consistency of timing mattering almost as much as duration — your circadian rhythm thrives on regularity. The highest-yield habits are boring but real: a consistent bedtime, a cool dark room, limiting alcohol in the evening (it fragments sleep architecture even when it helps you fall asleep), and getting bright light early in the day.
## Pain and sleep run in both directions
Pain disrupts sleep, and poor sleep amplifies pain — a cycle many of my patients know intimately. Breaking it often requires treating both sides at once: addressing the painful condition while deliberately protecting sleep.
If you''re doing everything right — therapy, training, treatment — and progress is slow, sleep is the first place I''d look.