Medical Disclaimer: This protocol is for chronic insomnia disorder (≥3 nights/week × 3 months). Do not use if you have untreated sleep apnea, bipolar disorder, seizure disorder, or safety-critical occupation with untreated sleepiness. Consult a sleep physician if unsure.
Why CBT-I Works (The Science)
- Sleep restriction consolidates fragmented sleep → ↑ sleep efficiency → ↑ sleep pressure (Process S) → faster onset, fewer awakenings.
- Stimulus control breaks bed-wake association → bed becomes cue for sleep, not worry.
- Cognitive restructuring reduces sleep effort/arousal — “trying to sleep” prevents sleep.
- Evidence: 70–80% remission at 12 months; effect size larger than hypnotics at 2-year follow-up (Riemann et al., Lancet 2022).
Week 0: Baseline Assessment (7 Days)
Before restricting, you need data. Track for 7 consecutive days:
| Metric | How to Record |
|---|---|
| Bedtime | Clock time you get into bed |
| Sleep onset latency (SOL) | Estimated minutes to fall asleep |
| Wake after sleep onset (WASO) | Total minutes awake during night |
| Wake time | Clock time you get out of bed |
| Time in bed (TIB) | Wake time − Bedtime (minutes) |
| Total sleep time (TST) | TIB − SOL − WASO |
| Sleep efficiency (SE) | TST / TIB × 100% |
| Sleep quality (1–10) | Subjective rating on waking |
| Daytime fatigue (1–10) | Mid-afternoon rating |
Calculate averages: Mean TST, Mean SE. These determine your Week 1 prescription.
Week 1: Sleep Restriction — The Core Intervention
Calculate Your Initial Time in Bed (TIB)
TIB = Average TST + 30 minutes (minimum 5.5 hours / 330 minutes)
Example: Average TST = 5h 45m (345 min) → TIB = 345 + 30 = 375 min = 6h 15m
Set Fixed Wake Time (7 Days/Week)
Choose a wake time you can maintain every day (weekends included). This anchors your circadian rhythm.
Bedtime = Wake Time − TIB
Example: Wake 6:30 AM, TIB 6h 15m → Bedtime = 12:15 AM
Rules for Week 1
- NO NAPS. If absolutely necessary: <20min, before 3 PM.
- NO EXTENDING TIB. Even if you feel tired.
- GET UP AT WAKE TIME. Even after bad night. Light exposure immediately.
- BED ONLY WHEN SLEEPY. Not “tired” — sleepy (eyes closing, head nodding).
- CONTINUE SLEEP DIARY. Every morning.
Week 2–4: Titration Based on Sleep Efficiency
| Weekly Average SE | Action | New TIB |
|---|---|---|
| SE > 90% | Add 15 minutes | TIB + 15min |
| SE 85–90% | Hold (sweet spot) | No change |
| SE 80–85% | Hold one more week | No change |
| SE < 80% | Subtract 15 minutes | TIB − 15min (min 5.5h) |
Goal: Stabilize at 85–90% SE with TST ≥ 7–8 hours (or your personal need).
Stimulus Control: The 4 Rules (Bootzin)
- Go to bed only when sleepy. Not at “bedtime” — when eyelids heavy, head nodding.
- Use bed only for sleep and sex. No reading, phone, TV, worrying, planning in bed.
- If not asleep in ~20 minutes (subjective — don’t clock-watch): Get up, go to another room, dim light, boring activity (read dull book, fold laundry, stretch) until sleepy. Return to bed. Repeat as needed.
- Fixed wake time every day. No sleeping in. This is non-negotiable.
Why 20 minutes? Normal SOL = 10–20 min. Longer = conditioned arousal. The get-up rule breaks the bed-wake link.
Cognitive Restructuring: Change Sleep Thoughts
| Unhelpful Thought | Evidence-Based Reframe |
|---|---|
| “I’ll never fall asleep.” | “I’ve fallen asleep every night of my life. My body knows how.” |
| “If I don’t sleep 8 hours, tomorrow is ruined.” | “I’ve functioned on less sleep before. I may be tired but I’ll cope.” |
| “I need to catch up on sleep.” | “Sleep pressure builds naturally. Extra time in bed creates fragmentation.” |
| “This insomnia is permanent.” | “Insomnia is maintained by behaviors/thoughts. CBT-I changes both.” |
| “I must get 8 hours.” | “Sleep need varies. Quality (consolidated) > quantity (fragmented).” |
Practice: Write down your automatic sleep thoughts. Challenge with evidence. Replace with balanced thought. Do this daily for 2 weeks.
Relaxation Training (Optional Adjunct)
Diaphragmatic Breathing (4-7-8)
- Inhale nose 4 sec → Hold 7 sec → Exhale mouth 8 sec (whoosh sound)
- 4 cycles = 1 minute. Activates vagal tone, ↓ sympathetic arousal.
- Practice 2x/day (not in bed) + at bedtime if needed.
Progressive Muscle Relaxation (PMR)
- Tense each muscle group 5 sec → Release 10 sec → Notice contrast
- Sequence: feet → calves → thighs → glutes → abdomen → chest → hands → arms → shoulders → face
- 15–20 min. Use guided audio initially (Insight Timer, CBT-I Coach app).
Sleep Hygiene: Necessary But Insufficient Alone
These support CBT-I but don’t cure insomnia alone:
- Caffeine: None after 12 PM (half-life 5–6h; quarter-life 10–12h)
- Alcohol: None 3h pre-bed (rebound arousal, ↓ REM, ↑ apnea)
- Exercise: ≥3h pre-bed (acute alerting effect)
- Light: Morning 10k lux × 10–30min; Evening <10 lux, amber/red only
- Temperature: 16–19°C (60–67°F)
- Noise: White/pink noise if needed; earplugs
- Clock: Remove or face away — clock-watching = arousal
Common Challenges & Solutions
| Challenge | Solution |
|---|---|
| “I’m too sleepy during the day” | Expected Week 1–2. Don’t nap. Stand, move, cold water, bright light. Safety first — don’t drive if impaired. |
| “I wake at 3 AM and can’t return” | Get up after 20min. Boring activity until sleepy. Don’t lie there ruminating. |
| “My partner/kids disrupt schedule” | Negotiate fixed wake time. Use earplugs/white noise. Separate bedrooms if needed temporarily. |
| “SE >90% but I still feel tired” | May need more TST. Add 15min TIB. Rule out OSA (STOP-BANG), medical causes. |
| “I’m anxious about the sleep restriction” | Reframe: “Temporary consolidation builds stronger sleep.” Anxiety = normal; proceed anyway. |
| “Weekend social life conflicts” | Fixed wake time = non-negotiable. Nap <20min pre-3pm if needed. Shift bedtime later only if SE >90%. |
When to Seek Professional CBT-I
- No improvement after 4 weeks of adherent 4-week protocol
- Comorbid depression, anxiety, PTSD, bipolar
- Suspected sleep apnea (snoring, witnessed apneas, STOP-BANG ≥3)
- Shift work / circadian rhythm disorder
- Medication taper needed (benzodiazepines, Z-drugs)
- Safety-critical occupation (pilot, driver, healthcare)
Find a provider: Society of Behavioral Sleep Medicine directory. Digital: Somryst® (FDA-cleared), Sleepio, CBT-I Coach (free VA app).
Printable Weekly Tracker
| Day | Bedtime | Wake Time | SOL (min) | WASO (min) | TIB (min) | TST (min) | SE % | Quality (1–10) |
|---|---|---|---|---|---|---|---|---|
| Mon | ||||||||
| Tue | ||||||||
| Wed | ||||||||
| Thu | ||||||||
| Fri | ||||||||
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| Avg |
References
- Riemann D, et al. “CBT-I for Insomnia.” Lancet. 2022;399(10334):1392-1405.
- Qaseem A, et al. “Management of Chronic Insomnia Disorder.” Ann Intern Med. 2016;165(2):125-133.
- Bootzin RR, et al. “Stimulus Control Treatment for Insomnia.” Psychol Rep. 1972;31(3):891-898.
- Edinger JD, et al. “Cognitive Behavioral Therapy for Insomnia.” Sleep. 2001;24(5):579-586.
- Trauer JM, et al. “CBT-I Systematic Review.” Ann Intern Med. 2015;163(3):191-204.