Serial Casting at the Ankle: What Parents Need to Know
Tight calf muscles can significantly limit ankle movement, particularly dorsiflexion, the motion of bringing the top of the foot toward the shin. When this movement is restricted, children may begin to walk on their toes, struggle with balance, or demonstrate inefficient movement patterns during activities like squatting, running, or jumping.
Over time, limited ankle range of motion can affect overall posture and movement mechanics. If left unaddressed, it may even contribute to abnormal bone development, foot pain, back pain, and other functional limitations. One effective intervention that may help address these concerns is serial casting.
How Serial Casting Can Help
Serial casting has been shown to be an effective way to increase ankle range of motion and improve walking patterns in children. It is often recommended for children who:
- Walk on their toes
- Are unable to achieve a heel-toe walking pattern
- Cannot stand comfortably with their heels flat on the ground
- Have difficulty standing still due to tightness or discomfort
- To be a good candidate for serial casting, a child must also be able to verbalize pain or discomfort, have good circulation, and have healthy skin with no issues related to healing.
What Is Serial Casting?
Serial casting involves the application of multiple layers of fiberglass wrap that harden into a cast, similar to a cast used after a fracture. In the case of limited ankle mobility, the cast is applied in a position that gently stretches the calf muscles. Each cast is worn for a set period of time, then replaced with a new cast that provides a slightly increased stretch. This gradual process continues until a functional and desired range of motion at the ankle is achieved.
Benefits of Serial Casting
Serial casting offers several important benefits, including:
- Improved muscle length: The prolonged stretch helps add muscle fibers, increasing calf muscle length and ankle range of motion.
- Better walking mechanics: Increased mobility allows for a more typical heel-toe walking pattern and improved foot-flat posture when standing.
- Improved weight-bearing: More even pressure through the feet can support healthy bone growth.
- Enhanced function: Research shows serial casting can improve walking quality and overall movement efficiency.
What to Expect While Your Child Is in Casts
While wearing serial casts, children are encouraged to continue their daily routines, including walking and being active throughout the day. However, caregivers should monitor a few important things:
- Watch for discomfort: Take note of any reports of pain or unusual sensations.
- Check circulation: Perform a capillary refill check by gently pressing on the big toenail until it turns white, then releasing. Color should return within about two seconds.
- Follow-up care: Serial casting is typically followed by physical therapy to focus on gait training, strengthening, and maintaining the gains achieved through casting.
Supporting Your Child’s Success
Serial casting is a collaborative process involving families, therapists, and medical professionals. When paired with skilled physical therapy, it can be a powerful tool to help children move more comfortably, confidently, and efficiently.
If you have concerns about your child’s walking pattern or ankle mobility, talk with a physical therapist to see whether serial casting may be an appropriate option. Book a free phone consultation with one of our pediatric PTs and get your questions answered. We’re here to support your family every step of the way!
