Intensity Determines Safety, Not Exercise Type Any exercise performed below your symptom exacerbation threshold is safe during concussion recovery. The threshold is the intensity at which your symptoms worsen. Below that line, exercise is beneficial. Above that line, exercise provokes symptoms and should be reduced. This threshold is individual and changes daily during recovery. An exercise that is safe on Monday at a given intensity might provoke symptoms on Tuesday at the same intensity. Monitor symptoms continuously during activity (Leddy et al., 2019). The physiological basis for sub-threshold exercise safety: Concussion impairs cerebral blood flow autoregulation. At low exercise intensities, the impaired autoregulation still maintains adequate brain perfusion. As intensity increases, the autoregulation fails to compensate, producing symptom exacerbation. The threshold represents the exercise intensity at which autoregulation breaks down. Training below this threshold retrains autoregulation without overwhelming the system. Each session shifts the threshold higher, allowing progressively more intense exercise over days and weeks. Three categories of exercise during concussion recovery: Safe from Day 1-2: Light aerobic activity, joint mobility, breathing exercises, gentle walking Safe after symptom tolerance established (typically Days 7-14): Moderate aerobic exercise, sport-specific movement without contact, light resistance training Requires medical clearance (typically Days 14+): Full-contact practice, heavy resistance training, high-velocity head movement activities Safe Aerobic Activities for Early Recovery Walking is the safest starting aerobic exercise. Walking provides aerobic stimulus without impact, rapid head movement, or collision risk. Start with 10-15 minutes at a comfortable pace. If walking does not worsen symptoms, increase duration to 20-30 minutes before increasing pace. Outdoor walking adds the benefit of natural light exposure, which helps regulate the circadian rhythm disruption common after concussion. Stationary cycling is the gold standard for controlled aerobic loading. The Buffalo Concussion Treadmill Test (BCTT) and Buffalo Concussion Bike Test use stationary equipment specifically because the intensity is precisely controllable. Cycling eliminates impact, allows easy heart rate monitoring, and provides an immediate stop option if symptoms increase. Start at low resistance, 60-70 RPM, for 15-20 minutes. Most concussion exercise research uses stationary cycling as the intervention (Leddy et al., 2019). Swimming at easy pace provides low-impact aerobic work. Water supports body weight and eliminates impact forces. The horizontal position reduces orthostatic stress on cerebral blood flow. Avoid diving, flip turns, or any activity requiring breath-holding (Valsalva increases intracranial pressure). Easy freestyle with breathing every 2-3 strokes at a conversational pace is appropriate for Stage 2 recovery. Joint Mobility Exercises Safe From Day 1 JME 155 Diaphragmatic breathing is the safest and most beneficial exercise on Day 1. Concussion shifts autonomic balance toward sympathetic dominance. The 4-second inhale, 6-second exhale pattern activates parasympathetic pathways through the vagus nerve, counteracting the sympathetic shift. This reduces resting heart rate, improves heart rate variability, and lowers the baseline symptom level that determines your exercise threshold. 10 breaths, performed 4-5 times daily. Zero risk of symptom exacerbation. JME 14 Chin tucks are safe from Day 1 because the movement is small, controlled, and does not involve rapid head movement or position changes. Chin tucks address the deep cervical flexor inhibition that occurs with every concussion. Restoring deep flexor activation reduces the cervicogenic headache and dizziness that worsen during exercise, effectively raising the symptom threshold for aerobic activity. 10 repetitions with 5-second holds. JME 1 Gentle cervical rotation is safe when performed slowly (3 seconds per direction) and within the pain-free range. Slow cervical rotation recalibrates proprioceptors disrupted by the whiplash mechanism without provoking vestibular symptoms. Rapid cervical rotation should be avoided in early recovery as the velocity-dependent proprioceptive input overwhelms the sensitized vestibular system. Slow and controlled is the rule. 10 repetitions each direction. JME 3 Lateral cervical flexion safely stretches the scalene and upper trapezius tension that develops from protective guarding after concussion. The movement is slow, linear, and does not involve rotation or extension that challenge the vestibular system. Lateral flexion also improves breathing mechanics by releasing the scalene muscles that are accessory breathing muscles. Better breathing mechanics improve exercise tolerance. 8 repetitions per side. Start your 14-day free trial for safe, structured concussion recovery programming. Thoracic and Shoulder Mobility Exercises JME 150 Seated thoracic rotation is safe from Day 1. The movement occurs in the mid-back while the head remains relatively stable, avoiding vestibular provocation. Thoracic rotation restores the breathing mechanics and trunk mobility needed for comfortable aerobic exercise. Thoracic stiffness restricts rib cage expansion, reducing exercise capacity independently of the brain injury. 8 repetitions per direction. JME 42 Shoulder circles safely address the protective shoulder elevation pattern that develops after concussion. The movement is gentle, repetitive, and does not involve rapid acceleration. Elevated shoulders compress the cervical spine and restrict breathing. Releasing the elevation pattern reduces cervical compression and improves respiratory mechanics. 10 repetitions each direction. JME 151 Lateral side bends with breathing combine trunk mobility and autonomic regulation. The lateral movement stretches the intercostal muscles and lateral trunk fascia that tighten during protective guarding. The breathing component adds parasympathetic activation. Safe from Day 2-3 when basic mobility exercises are tolerated. 8 repetitions per side. JME 15 Gentle cervical extension is safe when performed slowly and through partial range initially. Extension restores posterior cervical mobility and improves vertebral artery blood flow. Start with 50% of available range and progress as tolerance allows. Avoid rapid extension or end-range loading in the first week. 8 repetitions, slow and controlled. Progress to full range as symptoms allow. Access safe concussion recovery exercises with simplmobility's guided programming. Exercises to Avoid During Early Recovery Contact and collision activities. Any activity with risk of additional head impact is unsafe until medical clearance. A second concussion during recovery produces more severe and prolonged symptoms. The brain is more vulnerable to injury during the recovery window. Heavy resistance training. Heavy lifting with Valsalva maneuver increases intracranial pressure. The pressure increase challenges the impaired cerebral blood flow autoregulation. Bodyweight exercises and light resistance (below 50% of pre-injury loads) are appropriate for Stage 3-4. Heavy loading returns when aerobic exercise tolerance is fully restored. High-velocity head movements. Rapid head acceleration activities (headers in soccer, wrestling, gymnastics tumbling) are unsafe until vestibular and cervical function are fully restored. The velocity-dependent proprioceptive and vestibular challenge exceeds the recovering system's capacity. Prolonged screen-based exercise. Virtual cycling classes, video-guided workouts, and screen-dependent exercise combine cognitive load with physical exertion. The dual demand exceeds the threshold more quickly than exercise alone. Use screen-free exercise options during early recovery. Is yoga safe during concussion recovery? Gentle yoga with modified positions is safe from Stage 2. Avoid inversions (headstand, shoulder stand, downward dog held for extended periods) that increase intracranial pressure. Avoid rapid position transitions between standing and floor poses that challenge orthostatic regulation. Slow, breath-focused yoga sequences with minimal position changes are appropriate and beneficial for autonomic regulation. When is running safe after concussion? Running is typically safe at Stage 3 (Days 7-14) when light aerobic exercise is tolerated without symptom worsening. Start with slow jogging for 10-15 minutes. Running adds impact forces and greater cardiovascular demand than walking or cycling. The impact is well-tolerated when the cardiovascular system has adapted through Stage 1-2 aerobic training. Progress distance before increasing speed (Leddy et al., 2023). Do I need to wear a heart rate monitor during recovery exercise? A heart rate monitor is recommended but not required. The monitor provides objective intensity data that correlates with your symptom threshold. Most concussion patients have a reproducible heart rate at which symptoms worsen. Knowing this number allows precise intensity control. If a monitor is not available, the "talk test" (exercising at an intensity that allows conversation) provides a reasonable proxy for sub-threshold intensity during Stage 1-2. References Leddy, J. J., et al. (2019). Early subthreshold aerobic exercise for sport-related concussion: a randomized clinical trial. JAMA Pediatrics, 173(4), 319-325. PubMed Leddy, J. J., et al. (2023). Rest and exercise early after sport-related concussion: a systematic review and meta-analysis. British Journal of Sports Medicine, 57(12), 762-770. PubMed