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When and How to use High:
High frequency will create a strong, but soothing and constant buzzing sensation (no contractions).
This is ideal for shutting down more nagging soreness and pain not responsive to low frequency.
You must take more care in choosing electrode placement with high frequency.
High frequency is typically not recommended for many major muscle groups such as (quads, calves,
hamstrings, traps, biceps, triceps, forearms). On these muscles when the intensity is turned up the
muscle is likely to tetanize (fully contract and hold tight). Allowing the muscles to tetanize for any
duration of time will likely cause muscle fatigue. When using high frequency we advise to never
allow the muscle to tetanize; which may require avoiding high frequency in that location or
lowering the intensity level.
High frequency is very effective at shutting down soreness of the joints and muscle groups that are
very resistant to tetanization and fatigue such as the low back muscles. Examples include (ankle,
knee, hip, shoulder, wrist, low back, mid back, neck).
When you use high frequency you want to feel the buzzing right where the pain is; if that’s not the
case move the electrodes (if the pain is in a muscle that will tetanzie like the quads or calves use low
frequency). Once it’s buzzing right where the pain is turn the intensity strong enough to block the pain
signals, but always stay within your tolerance.
A 30 minute high frequency session is great and will typically provide lasting relief. To avoid skin
irritation we recommend not performing high frequency for more than 60 minutes at one time.
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