Why same-day intense exercise isn’t recommended

The honest answer to “can I work out after my session?” depends almost entirely on how many hours have passed and what kind of workout you mean. Same-day, post-infusion, anything intense is not a good idea. The reasoning is the same reasoning behind the no-driving rule: your motor control, reaction time, and judgment can be subtly off for several hours, even after the obvious dissociation has worn off and you feel basically normal.

The 2024 FDA prescribing information for Spravato (esketamine) is explicit on this point. Patients should not engage in potentially hazardous activities requiring complete mental alertness and motor coordination, such as operating machinery or driving, until the next day after a restful sleep. Heavy lifting, intervals, and contact sports fall squarely into the “requires complete mental alertness and motor coordination” category. The same logic that keeps you out of the driver’s seat keeps you off the squat rack.

Ketamine is FDA-approved as an anesthetic; its use for depression, anxiety, PTSD, and chronic pain is off-label. The post-session activity restrictions, however, are derived from the same pharmacology and the same safety data, regardless of why the medication was administered.

The motor-control and coordination window

What’s actually happening in those hours after a session is well characterized. A 2020 long-term safety analysis published in the Journal of Clinical Psychiatry by Wajs and colleagues evaluated esketamine across more than a year of dosing. The transient post-dose effects on alertness, perception, and coordination consistently cleared within hours of administration, and no persistent motor effects were observed. That’s reassuring for the next day. It’s also the reason day-of restrictions exist.

Andrade’s 2017 review in the Journal of Clinical Psychiatry describes the typical recovery window in the same terms clinicians use for any procedural sedation: the patient is alert, oriented, and ambulatory before discharge, but should not drive, operate machinery, make important decisions, or engage in physically demanding activities until the following day. We apply that framework directly to exercise.

Subjectively, patients often describe the rest of the day as a little floaty, a little tender, sometimes emotionally open. Heart rate response to exertion can feel uncalibrated. Proprioception—the sense of where your body is in space—can be slightly delayed. None of these effects are dangerous on a couch. They become a problem under a barbell or on a trail run.

What’s typically fine the evening of a session

Once you’re home, eating, hydrating, and feeling clearheaded, gentle movement is usually fine for most patients. A walk around the block. A walk with the dog. Light stretching. Gentle restorative yoga without inversions or balance challenges. The goal is parasympathetic, not performance.

What we ask people to skip on the day of a session:

For more on what the rest of session day should look like, see our guide to after-ketamine recovery and our notes on what to eat before and after a session.

Next-day workouts: what most patients do

The day after a session, with a full night of restful sleep behind them, most healthy patients return to their normal training without modification. That’s the consistent pattern we see in clinic and the pattern reflected in the discharge guidance derived from the FDA labeling and the published safety literature. Lift your normal weights. Run your normal routes. Take your normal class.

That said, individual variability is real. Some patients feel completely back to baseline by morning. Others describe a lingering sense of being slightly off into the afternoon of day two—not impaired, but not at 100%. If that’s you, deload the first session back. Drop a set. Use 80% of your usual working weight. Skip the sprint finisher. Then ramp back up the following day.

This is not a sign that something went wrong. Recovery from any medication is a curve, not a switch. The published discharge criteria reflect a population average; you are an individual.

Heavy lifting, contact sports, and high-risk activities

For training that carries injury risk if your coordination is off—heavy compound lifts, Olympic lifts, gymnastics, climbing, contact sports, riding—the standard we use is the same as for driving. Wait until the next day, and wait until after restful sleep. If you didn’t sleep well that night, that’s a reason to push the heavy session by a day, not a reason to grind through it.

If you train under a coach, a useful conversation: tell your coach when your sessions are scheduled and let them program around it. Most coaches are happy to swap a heavy day for a technique day or active recovery if they know in advance.

Cardio, hot yoga, and the cardiovascular angle

Ketamine has transient effects on blood pressure and heart rate during the infusion itself. Those effects resolve well before discharge, but the cardiovascular system, like everything else, benefits from a normal sleep cycle before being asked to perform. The day after a session, normal aerobic work—steady-state cardio, a run, a bike ride, a hot yoga class—is generally fine for healthy patients without cardiovascular concerns.

The two cardio-adjacent things worth flagging are heat and dehydration. If you went into your session well-hydrated and you’re continuing to hydrate the next morning, hot yoga the day after is usually fine. If you woke up parched with a headache, push the hot class to the following day and do something cooler. Patients with diagnosed cardiovascular conditions should defer to their cardiologist’s guidance on exertion timing, not a blog post.

Exercise as integration support

The neuroplastic window that opens after a session—the period when the brain is more responsive to forming new connections—is also a window where movement tends to feel different. Many patients describe an easier time getting to the gym in the days following an infusion, a softer mental edge between “don’t want to” and “showed up anyway.” That’s consistent with what we know about ketamine’s effects on glutamate signaling and BDNF expression and what we know about exercise’s independent effects on the same systems. They appear to be additive, not at odds.

If movement has been part of how you take care of yourself, keep it part of the picture. If movement has lapsed, the days after a session can be a useful re-entry point. The goal isn’t to crush a workout; the goal is to use the window. For more on how the clinic supports recovery and integration, our how it works overview and the first-infusion guide walk through what to expect.

When to flag unusual fatigue or weakness

Mild fatigue, mild muscle tenderness, and a slightly off-feeling next morning are within normal range. Persistent weakness, dizziness with standing, chest tightness, shortness of breath disproportionate to your exertion, or any new neurological symptom is not. Studies indicate the post-ketamine recovery curve is reliably short for most patients, but reliable does not mean universal. If something feels wrong, stop the workout, hydrate, and call us at (615) 988-4600. Contact your prescribing physician for anything that doesn’t resolve within a few hours.

Marla Peterson, CRNA, oversees every infusion and reviews discharge readiness before any patient leaves the clinic. If you have specific training goals or athletic constraints, mention them at your consultation. Anesthesia-level monitoring during the session and individualized discharge guidance afterward are how we keep this boring in the way it should be boring.