How to Keep Training When You're Injured (Without Making It Worse)
By Rizin AI Team · May 14, 2026 · 6 min read · Training
When most people get injured they either push through and make it worse, or stop completely and lose months of progress. The right answer is in the middle — and it requires knowing exactly what you can and can't do with your specific injury.
The biggest mistake injured people make
When most people get injured, they do one of two things: they push through the pain and make it worse, or they stop training entirely and lose months of progress. Both are wrong. The right answer is in the middle — and it requires knowing exactly what you can and can't do with your specific injury.
Most fitness apps make this harder than it needs to be. They let you "exclude" an exercise, but the rest of the plan stays identical. Remove squats because of a knee injury and you're left with a leg day that either skips legs entirely or replaces squats with lunges — which load the knee the same way. That's not injury-aware programming. That's a filter.
What real injury-aware programming looks like
A genuine injury-friendly workout system does three things that a basic exclusion filter doesn't:
1. It routes around the entire affected muscle group, not just one exercise. A knee injury doesn't just mean no squats. It means no lunges, no leg press through a deep range, no Bulgarian split squats, and careful attention to hip flexor loading. Any plan that removes squats but keeps lunges isn't protecting your knee.
2. It maintains training volume on unaffected areas. If your knee is injured, your upper body, core, and glutes can still train at full intensity. A good plan uses the injury period to bring up lagging areas rather than reducing everything.
3. It rebuilds progressively as you recover. Not all at once — progressively. Starting with isometric holds, moving to partial range movements, then full range over weeks as the injury heals.
Training with a knee injury
Knee injuries are the most common training setback. Whether it's patellar tendinitis, a meniscus issue, or general knee pain, the principle is the same: avoid deep knee flexion and high-impact loading while maintaining strength everywhere else.
What to avoid: Squats below parallel, lunges, leg press with deep range, box jumps, running, any plyometric work.
What you can do: Upper body work at full intensity. Hip hinges (deadlifts, Romanian deadlifts) if pain-free. Terminal knee extensions. Seated leg curls. Straight-leg raises. Glute bridges. Swimming or cycling if tolerated.
The underrated opportunity: Most people neglect hip abductor and glute strength, which is one of the main causes of knee pain in the first place. An injury period is the perfect time to build the strength that prevents the problem from returning.
Training with a shoulder injury
Shoulder injuries are tricky because the shoulder is involved in almost every upper body movement. The most common issues are rotator cuff impingement, shoulder impingement syndrome, and AC joint pain.
What to avoid: Overhead pressing, upright rows, behind-the-neck exercises, wide-grip bench press, any movement that causes sharp pain at the top of the range.
What you can do: Rows (especially cable rows and dumbbell rows at a neutral grip). Face pulls. External rotation work. Neutral-grip pressing if tolerated. Lower body work at full intensity. Core work.
The recovery approach: Most shoulder impingement improves significantly with external rotation strengthening and scapular stability work. Adding face pulls, band pull-aparts, and rear delt flies — not just removing overhead press — is the difference between recovering and staying stuck.
Training with a lower back injury
Lower back pain is one of the most common reasons people stop training — and one of the most misunderstood. In most cases, continuing to move (carefully) heals faster than complete rest.
What to avoid: Heavy barbell deadlifts, good mornings, spinal flexion under load, high-impact activities during acute flare-ups.
What you can do: Walking (genuinely underrated for lower back recovery). Upper body work. Hip hinge patterns with light load if tolerated. McGill Big 3 (bird dog, modified curl-up, side plank). Glute bridges. Core anti-rotation work.
Key insight: Most lower back injuries respond well to hip hinge strengthening and core stability work. A plan that removes all posterior chain work during a back injury misses the most important rehabilitation component.
When to rest vs when to modify
Rest completely when: you have acute inflammation (swelling, heat, sharp pain), you've been told by a doctor not to train, or the pain is getting worse with each session.
Modify and continue when: the injury is stable, movement at a reduced load is pain-free, and you're past the acute phase. This is the case for the vast majority of training injuries after the first 48–72 hours.
The key question is not "should I train?" but "what can I train?" Almost always, the answer is "more than you think."
How Rizin handles injuries differently
When you flag an injury in Rizin — shoulder impingement, knee pain, lower back issue — the entire plan regenerates around it. Not just removing one exercise. The full session structure rebuilds to maintain volume on everything you can train, route around everything that would aggravate the injury, and progressively reintroduce load as you recover. Read more about how Rizin's injury detection turns a flagged injury into a hard constraint on every future session.
Injuries are treated as hard constraints, not soft preferences. The AI coach also has full context on your injury when you ask questions — "is this exercise safe for my knee?" gets an answer based on your actual plan, not generic advice.
As you recover, you mark the injury as healed and the plan rebuilds automatically — progressively reintroducing the movements you were avoiding, starting at reduced intensity and building back to full training.
If you're weighing whether an AI app is the right way to handle this at all, read our honest comparison: Is an AI Personal Trainer Worth It in 2026?
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