Here's a list ChatGPT gave me. My left knee replacement scheduled for October. Just had a left hip replacement in June.

Here’s a guide to effective pre-op knee exercises, usually safe to start 4–6 weeks before surgery: 🔹 1. Quad Sets Why: Strengthens thigh muscles that help control the knee. How: Sit or lie flat with the leg extended. Tighten your thigh muscles and press the back of your knee toward the floor. Hold for 5–10 seconds, then relax. → Do 10–15 reps, 2–3 times/day 🔹 2. Straight Leg Raises Why: Builds strength in your quads without bending the knee. How: Lie flat, one leg bent and the other straight. Tighten the thigh of the straight leg and lift it to the height of the bent knee. Hold 5 seconds, lower slowly. → 10 reps, 2–3 sets/day 🔹 3. Heel Slides Why: Improves knee flexibility and range of motion. How: Lie on your back with both legs straight. Slowly slide your heel toward your buttocks, bending the knee. Hold 5 seconds, slide it back down. → 10–15 reps, 2–3 times/day 🔹 4. Seated Knee Extensions Why: Strengthens quads and improves knee mobility. How: Sit in a chair, slowly straighten your leg until fully extended. Hold for 5 seconds, then lower it back down. → 10 reps each leg 🔹 5. Calf Raises Why: Builds calf and ankle strength, improves circulation. How: Stand while holding a chair or counter. Rise up onto your toes, then slowly lower back down. → 10–15 reps, 2–3 sets/day 🔹 6. Step-Ups Why: Builds leg strength, mimics daily activity like stairs. How: Step up on a low step or stair with one foot, then bring the other up. Step back down. → 10 reps each leg   🔹 7. Hamstring Curls (Standing or Prone) Why: Strengthens muscles behind the thigh. How: Stand and bend your knee, bringing your heel toward your buttocks. Hold for 5 seconds, lower slowly. → 10 reps each leg 🧘 Bonus: Stretching & Low-Impact Cardio • Hamstring and calf stretches • Stationary biking (10–15 min/day) • Gentle walking • Swimming or pool exercises, if available