What This Exercise Does
Ankle pumps are simple flexion and extension movements at the ankle joint. Despite their simplicity, they serve several critical purposes:
- Prevents blood clots: Muscle contractions squeeze veins and push blood back to the heart, preventing stagnation
- Reduces swelling: Pumping action helps drain fluid from the surgical limb
- Maintains ankle mobility: Keeps the ankle joint moving to prevent stiffness
- Promotes healing: Improved circulation brings nutrients and removes waste products
- Safe immediately post-op: No stress on the knee or ACL graft
Step-by-Step Instructions
Get Into Position
Lie on your back or sit in a reclined position with your surgical leg elevated. Elevation combined with ankle pumps is most effective for reducing swelling. Your knee can be straight or slightly bent.
Point Your Toes Down (Plantarflexion)
Slowly point your toes away from you, as if pressing down on a gas pedal. You should feel your calf muscle contract. Move through your full available range of motion.
Pull Your Toes Up (Dorsiflexion)
Pull your toes back toward your shin, stretching the calf. You should feel a gentle stretch in the back of your lower leg. Go as far as comfortably possible.
Pro Tip
Think of this as alternating between pressing a gas pedal and releasing it. The motion should be smooth and controlled, not jerky.
Add Ankle Circles (Optional)
For variety, you can also rotate your ankle in circles - clockwise for 10 rotations, then counterclockwise for 10 rotations. This moves the ankle in all planes of motion.
Continue Rhythmically
Pump your ankle up and down in a continuous, rhythmic motion. Perform 20-30 repetitions per set, completing sets every 1-2 hours while awake in the first week.
Common Mistakes to Avoid
- Not doing them frequently enough: You should perform ankle pumps many times per day, especially in the first 1-2 weeks. Set reminders if needed.
- Moving too quickly: Fast, jerky movements are less effective than slow, controlled pumps that fully activate the muscle.
- Limiting range of motion: Move through your full available range in both directions for maximum benefit.
- Only doing the surgical leg: Do ankle pumps on both legs to maintain symmetry and circulation.
- Stopping too early in recovery: Continue ankle pumps throughout your recovery, especially during periods of rest or travel.
Warning Signs - Contact Your Doctor Immediately
If you notice calf pain (especially when flexing your ankle), swelling in one calf more than the other, redness or warmth in your calf, or unexplained shortness of breath, these could be signs of a blood clot. Contact your medical team immediately.
Recommended Frequency
Days 0-3: Maximum Frequency
Perform 20-30 pumps every hour while awake. Your mobility is most limited during this time, making ankle pumps especially important.
Days 4-14: Regular Intervals
Continue performing ankle pumps every 1-2 hours. Combine with leg elevation for best swelling control.
Weeks 2-6: As Needed
Perform ankle pumps after periods of rest, during long sitting, and whenever you notice increased swelling.
Long-term: Travel and Prolonged Sitting
Continue doing ankle pumps on long flights, car rides, or any situation where you're sitting for extended periods.