Which exercise can help improve stability while in right skeletal lower leg traction?

Improving stability while in right skeletal lower leg traction involves exercises that promote mobility and strength without compromising the support provided by the traction. Flexing and extending the feet is particularly beneficial in this context, as it engages the muscles of the lower leg, particularly the tibialis anterior and the gastrocnemius, while also encouraging proper movement through the ankle joint. This motion can help maintain joint health and muscle function despite the limitation imposed by the traction.

The other options do involve physical activities, but they can be more challenging and may not be suitable for someone in traction. Side lunges and squatting involve greater weight-bearing activities which could place undue stress on the injured area. Running on the spot requires significant coordination and can lead to instability, which is the opposite of what is needed in traction. Hence, flexing and extending the feet is the most appropriate choice for enhancing stability in such a constrained circumstance.