Week 1: The Acute Phase Days 1-2 are typically the worst. Headache, fatigue, dizziness, nausea, light sensitivity, and noise sensitivity peak during this window. The brain is in a metabolic energy crisis: neurons demand more glucose while cerebral blood flow decreases. This mismatch produces the intense early symptoms. Most people need significant activity reduction during these first 48 hours. Days 3-5 bring the first improvements. Nausea usually resolves. Headache intensity begins decreasing. Light and noise sensitivity start improving. Fatigue remains significant but becomes more predictable. You should begin introducing gentle activity: short walks (10-15 minutes), light household tasks, brief social interactions. Sub-symptom-threshold aerobic exercise starting at day 2-3 accelerates recovery compared to strict rest (Leddy et al., 2018). Days 5-7 feel like a plateau. The rapid improvement from days 1-5 slows down. This is normal and does not mean recovery has stalled. Cognitive symptoms (brain fog, difficulty concentrating, word-finding difficulty) are now more noticeable because physical symptoms have improved enough to unmask them. Many people feel frustrated during this plateau because they expected linear improvement. Week 2: Functional Improvement Cognitive symptoms begin improving. Concentration duration increases. Brain fog lifts for longer periods. Reading becomes more tolerable. Screen tolerance improves. Most people start returning to modified work or school during week 2. Physical symptoms are intermittent. Headache may still appear during exertion, prolonged concentration, or busy environments, but it is less constant. Dizziness triggers become more specific (rapid head turns, busy visual environments) rather than constant. Sleep quality starts normalizing. Activity tolerance expands. Walking duration increases. Light exercise (stationary bike, easy swimming) becomes tolerable at low intensity. Social interactions are less draining. The key is respecting symptom limits while continuing to push gently against them. Each day should involve slightly more activity than the day before, provided symptoms remain manageable. Emotional symptoms become prominent. As physical and cognitive symptoms improve, emotional changes become more noticeable. Irritability, mood swings, anxiety, and frustration are common during week 2. These are normal parts of brain recovery, not signs of a separate problem. Week 3: Return to Most Activities Most daily activities are tolerable. Full workdays become possible, though fatigue may increase by late afternoon. Screen tolerance is significantly improved. Driving, shopping, and social activities resume with minimal symptom provocation. Exercise intensity gradually increases following a structured return-to-activity protocol. Residual symptoms are mild and situational. Headache appears only with prolonged exertion or specific triggers. Fatigue is noticeable but manageable. Cognitive function is near baseline for most tasks. You feel like yourself again for most of the day, with occasional symptom flares that resolve with brief rest. Sleep normalizes. Sleep onset, sleep duration, and sleep quality approach pre-injury levels. Difficulty falling asleep and early morning waking, common in weeks 1-2, have largely resolved. Consistent sleep becomes the foundation supporting continued recovery. Week 4: Resolution for Most People 80-90% of adults are functionally recovered by week 4 (McCrory et al., 2017). Symptoms are either resolved or so mild they do not interfere with daily activities. Return-to-sport protocols can typically reach the final stages. Full cognitive demands are tolerated. Adolescents often need an additional 1-2 weeks. The developing brain's recovery trajectory runs 2-4 weeks rather than the adult 2-3 week course. This is normal, not a sign of complication. Cervical Mobility Through Recovery Weeks Cervical exercises should begin as early as day 2-3, starting gently and progressing weekly: JME 1 Start with small-range cervical rotation in week 1. By week 2, increase to full available range. This is the foundational cervical exercise for concussion recovery, restoring the rotational mobility lost during the protective guarding phase. JME 14 Deep cervical flexor activation from week 1. These stabilizers weaken within days of injury. Early reactivation reduces cervicogenic headache contribution and improves head positional control needed for balance recovery. JME 5 Add cervical extension in week 1-2. This addresses suboccipital restriction that contributes to headache originating from the upper cervical spine. Move slowly and stop if dizziness increases. JME 8 Cervical rotation with slight flexion challenges the vestibular-cervical interaction. Add this in week 2 when basic range of motion is comfortable. This exercise bridges cervical mobility and vestibular recalibration. Start your 14-day free trial for week-by-week concussion recovery mobility programming. Weeks 2-4 Progressive Mobility JME 150 Thoracic rotation starting in week 2. The rotational component provides graded vestibular challenge while restoring mid-back mobility lost during rest. JME 154 Thoracic lateral flexion in weeks 2-3 adds a different plane of spinal movement and provides novel vestibular input that supports balance system recalibration. JME 42 Shoulder mobility from week 2 addresses the protective posture that accumulates during recovery. Releasing shoulder tension reduces the muscular contribution to headache. JME 91 Lumbar rotation in weeks 3-4 restores full spinal movement variability. By this stage, global spinal mobility work supports return to exercise and sport activities. Progress your recovery with simplmobility's guided mobility programs. Warning Signs at Each Stage Week 1 warning signs: Worsening headache despite rest, repeated vomiting, seizure, one pupil larger than the other, loss of consciousness, increasing confusion. These require emergency evaluation. Week 2 warning signs: No improvement at all from week 1 symptoms, new symptoms appearing, inability to tolerate any activity. These warrant medical reassessment. Week 3-4 warning signs: Symptoms still at moderate-severe levels, inability to return to modified work/school, significant emotional deterioration. Referral to a concussion specialist is appropriate at this point. Is recovery always linear? No. Recovery follows a general upward trend, but day-to-day fluctuations are normal. A bad day after several good days does not mean your recovery has reversed. Common causes of temporary setbacks include poor sleep, stress, overexertion, weather changes, and hormonal fluctuations. Judge recovery progress in weekly trends, not daily snapshots. What if I feel fine one day and terrible the next? This pattern is extremely common in weeks 2-3. The brain's energy reserves are rebuilding but not yet stable. A day of higher activity depletes reserves, producing a "crash" the following day. This does not mean you did damage. Reduce activity slightly the next day, then resume your gradual progression. Over time, these fluctuations narrow until baseline feels stable. When do emotional symptoms resolve? Emotional symptoms often resolve last, typically 1-2 weeks after physical and cognitive symptoms. Irritability, mood swings, and anxiety in weeks 2-4 are normal neurological symptoms of recovery. If emotional symptoms worsen or include depression or personality changes beyond week 4, seek evaluation from a professional experienced in concussion management. References McCrory, P., et al. (2017). Consensus statement on concussion in sport: The 5th International Conference on Concussion in Sport. British Journal of Sports Medicine, 51(11), 838-847. PubMed Leddy, J. J., et al. (2018). Early subthreshold aerobic exercise for sport-related concussion. JAMA Pediatrics, 172(4), 319-325. PubMed