Standard Orthosis Comparing a Supportive Type Orthotic to a Proprioceptive Insole
- Supportive type orthotics (with built in arch supports) weaken the muscles of the foot (see animation below) and may have little or no impact on improving postural stability.
- Clinical examination of the above patient revealed a dramatic weakness of the peroneal longus and anterior tibialis muscles (disuse atrophy).
- An electromyographic study demonstrated a decreased excursion (activity) of the peroneal longus and anterior tibialis muscles when the supportive orthotics were worn.
Angela Caine, a well respected voice coach in Southampton UK and author of The Voice Workbook: Use your voice with Confidence, emailed me (see below) her observations regarding arch supports and the singing voice.
