A cortisone shot involves injecting medication directly into a painful or inflamed area, such as a joint, tendon sheath, or bursa. This injection contains a powerful anti-inflammatory corticosteroid mixed with a local anesthetic for immediate pain relief. The goal is to reduce swelling and pain, allowing for physical therapy or natural healing. Regarding exercise, the answer is definitively “not immediately,” as the required downtime depends on the timing and intensity of the activity.
The Immediate Post-Injection Period
The first 24 to 48 hours following a cortisone injection require complete rest for the affected body part. This initial inactivity is important for two primary reasons. First, physical rest allows the corticosteroid solution to properly settle and localize within the targeted tissue, maximizing the therapeutic benefit. Limiting movement ensures the medication concentrates where it is needed most.
During this window, patients may experience a temporary increase in pain and inflammation called a “cortisone flare.” This flare occurs as the fast-acting local anesthetic wears off before the slower-acting corticosteroid begins to reduce inflammation. To avoid reducing the injection’s effectiveness and increasing discomfort, avoid any physical stress on the injection site.
Resuming Light Activity
The transition period typically begins after the initial 48-hour rest and may last up to a week. The goal at this stage is to introduce movement without placing stress or load on the treated area. Light activities, such as gentle walking, normal daily household tasks, or low-impact range-of-motion exercises, are generally permitted.
For example, a patient who received an injection in their shoulder might perform gentle pendulum swings or wall climbs to maintain flexibility. Physical therapy exercises focusing on precision over intensity, such as light stretching or activation drills, can also be resumed. These movements encourage blood flow without overexerting the joint, which is beneficial for the healing process. It is important to listen closely to the body’s signals and stop immediately if any activity causes increased discomfort. Continue to avoid jarring motions or significant resistance to protect the injection site.
When to Return to Strenuous Exercise
A full return to strenuous exercise, including high-impact cardio, heavy weightlifting, running, or aggressive sports, is typically avoided for at least one to two weeks following the injection. This extended period of restricted activity is necessary because corticosteroids can temporarily affect the structural integrity of soft tissues. The medication may weaken tendons and cartilage, making them vulnerable to damage if subjected to high loads or repetitive stress too soon. The risk of tendon rupture or cartilage damage is especially relevant for injections near major tendons or in weight-bearing joints like the knee or hip.
Masking Pain and Gradual Return
The powerful pain relief provided by the injection can also mask the body’s natural warning signals. This allows a person to unknowingly push the weakened tissue past its breaking point, potentially causing severe injury. For injections into areas like tendons, healthcare providers might recommend avoiding heavy impact and loading activities for two to three weeks. A gradual increase in intensity is always advised, and clearance from the treating physician or physical therapist is important before attempting a full return to high-risk activities.