Here’s the thing nobody tells you early enough: your body has two very different kinds of pain when you exercise, and mixing them up is how people end up with injuries that are much harder to recover from.
Normal muscle soreness — the kind that shows up a day or two after a hard workout — is your muscles adapting and getting stronger. That’s generally fine to push through. Sharp pain during or immediately after exercise is something else entirely. According to the Arthritis Foundation, sharp pain is a signal that something may actually be injured. That’s your body telling you to stop, not to grind harder.
When soft tissue like a muscle, tendon, or the tissue around a joint gets injured, your body kicks off a healing process that happens in stages — first inflammation, then rebuilding, then remodeling. According to NCBI, moving through those healing stages successfully usually requires temporarily reducing physical activity to let the tissue recover, followed by a gradual return to loading. If you skip that recovery window and keep pushing, you interrupt the healing cycle before it can finish, making the injury worse and harder to fully recover from.
The National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS) points out that injuries like tendinitis — inflammation of the tissue connecting muscle to bone — often happen from repeating the same motion over and over, and can affect the shoulder, elbow, wrist, hip, knee, or ankle. Continuing to train through that kind of pain doesn’t make it tougher — it makes it worse.
The most important takeaway: if it’s a dull ache or muscle tiredness, you’re probably fine. If it’s sharp, sudden, or located right at a joint, stop — rest is the move, not pushing through.