Does higher energy shockwave therapy work better than lower energy?

Not necessarily. There is a therapeutic window for ESWT energy levels. Too little energy may be ineffective, but too much can cause unnecessary pain or tissue damage without improving outcomes. Evidence-based protocols match energy levels to the specific condition and tissue depth.

Why do different providers use different shockwave therapy settings for the same condition?

Protocol variability exists because clinical studies have used different parameters, and no single universal protocol has been established for most conditions. Additionally, providers may adjust settings based on the specific device they use, patient tolerance, and clinical response. This is why provider experience and training matter.

Can I ask my provider to turn down the intensity if treatment is too painful?

Yes. Many experienced providers use a biofeedback approach, adjusting energy levels based on your pain tolerance during treatment. Some discomfort is expected and may be necessary for therapeutic benefit, but treatment should remain tolerable. Communicate openly with your provider about your pain level during the session.

Shockwave Therapy Treatment Protocols Explained

If you have researched shockwave therapy, you have likely encountered terms like “energy flux density,” “2,000 impulses,” or “0.20 mJ/mm2” and wondered what any of it means. These numbers are not marketing jargon. They represent the core treatment parameters that determine whether your shockwave therapy session is effective, ineffective, or unnecessarily aggressive.

For the curious patient evaluating treatment quality – or the clinician new to extracorporeal shockwave therapy (ESWT) – understanding these protocols provides a framework for asking better questions and making better decisions. For context on the two main device categories, see focused vs. radial shockwave therapy.

The Key Protocol Variables

Every ESWT treatment session involves five core parameters that the provider controls:

Energy Flux Density (EFD)

What it is: The amount of energy delivered per unit area, measured in millijoules per square millimeter (mJ/mm2). This is the single most important treatment parameter.

Categories:

Low energy: < 0.08 mJ/mm2
Medium energy: 0.08 to 0.28 mJ/mm2
High energy: > 0.28 mJ/mm2

Low-energy protocols are used for superficial conditions and sensitive areas. High-energy protocols are typically reserved for deep tissue conditions like calcific shoulder tendinitis, where the target tissue is several centimeters below the skin surface. Most outpatient ESWT falls in the medium-energy range.

Number of Impulses (Pulses)

What it is: The total count of shockwave pulses delivered per session. This typically ranges from 1,500 to 4,000 impulses depending on the condition and treatment area.

More impulses mean a longer session and more total energy delivered. However, the relationship between pulse count and outcomes is not purely linear – there is a therapeutic ceiling beyond which additional impulses do not improve results and may increase post-treatment soreness.

Frequency (Hz)

What it is: The rate at which pulses are delivered, measured in hertz (cycles per second). Common settings range from 1 to 15 Hz.

Lower frequencies (1 to 4 Hz) deliver pulses slowly, allowing the provider more control and the patient more time to adjust. Higher frequencies (8 to 15 Hz) speed up the session but may increase discomfort. Frequency does not change the energy per pulse – it changes how fast those pulses arrive.

Focal Depth

What it is: The tissue depth at which the shockwave energy is concentrated, relevant primarily for focused ESWT devices. Providers adjust focal depth based on the anatomical depth of the target structure.

For example, a plantar fascia insertion at the heel is relatively superficial (1 to 2 cm), while a deep gluteal tendon may require focal depths of 4 to 6 cm. Radial pressure wave devices do not have adjustable focal depth – their energy disperses outward from the applicator surface.

Treatment Area

What it is: The anatomical zone where shockwave energy is applied. Providers typically treat the point of maximum tenderness plus a surrounding margin. Some protocols involve treating the broader myofascial region in addition to the primary pain point.

Protocol Examples by Condition

Published clinical studies provide reference protocols for common conditions. These are not absolute standards, but they represent the evidence base that informed providers draw from:

Condition	Typical EFD (mJ/mm2)	Impulses per Session	Sessions	Device Type
Plantar fasciitis	0.16 - 0.25	2,000 - 2,500	3 - 5	Focused or radial
Tennis elbow	0.08 - 0.12	2,000	3 - 5	Focused or radial
Calcific shoulder tendinitis	0.20 - 0.40	2,000 - 4,000	3 - 4	Focused (preferred)
Achilles tendinopathy	0.10 - 0.20	2,000 - 3,000	3 - 5	Focused or radial
Patellar tendinopathy	0.10 - 0.18	2,000 - 2,500	3 - 5	Focused or radial
Myofascial trigger points	0.04 - 0.10	2,000 - 3,000	3 - 6	Radial (common)

A 2021 review in Physical Therapy in Sport noted that while these ranges reflect the bulk of published evidence, there is no universally agreed-upon protocol for any condition, which partially explains variability in reported outcomes across studies (Korakakis et al., 2021, Physical Therapy in Sport).

The Dose-Response Relationship: More Is Not Always Better

One of the most important concepts in ESWT protocol design is the therapeutic window. Like pharmacological dosing, shockwave therapy has a range within which treatment is effective:

Below the therapeutic threshold: Energy is too low to stimulate a meaningful biological response. The treatment feels comfortable but does little.
Within the therapeutic window: Energy is sufficient to trigger neovascularization (new blood vessel growth), mechanotransduction (cellular repair signaling), and pain modulation. This is where outcomes are optimized.
Above the therapeutic window: Excessive energy causes unnecessary tissue damage, increased pain, and potentially worse outcomes. A 2008 study on plantar fasciitis found that ultra-high energy protocols did not produce better results than standard-energy protocols and caused significantly more post-treatment pain (Gerdesmeyer et al., 2008, American Journal of Sports Medicine).

Biofeedback Dosing: The Art of Protocol Adjustment

Experienced providers do not rigidly follow published protocols. They use a biofeedback approach, adjusting energy levels in real time based on the patient’s pain response during treatment.

The method works like this: the provider starts at a lower energy level and gradually increases until the patient reports moderate discomfort (typically 5 to 7 on a 10-point scale). This level is maintained for the remainder of the session. If pain becomes severe, the provider reduces the energy.

This approach accounts for individual variation in pain sensitivity, tissue condition, and treatment tolerance. It also explains why two patients with the same diagnosis may receive different energy settings from the same provider – and why that is appropriate rather than inconsistent.

Why Protocol Variability Matters for Research

One reason the shockwave therapy research landscape can be confusing is that studies on the same condition often use different protocols. A trial using low-energy radial shockwave therapy for plantar fasciitis will produce different results than one using high-energy focused ESWT – yet both may be labeled as “shockwave therapy for plantar fasciitis.”

This makes meta-analyses (studies that pool results across multiple trials) challenging to interpret. When a systematic review reports “mixed evidence” for ESWT, it is often because the included studies used such different parameters that pooling results is like comparing different drug dosages.

Providers offering ESWT should understand this nuance and be able to explain to patients which protocol they follow and why.

The Bottom Line

Shockwave therapy treatment protocols involve specific, adjustable parameters that directly influence treatment outcomes. The best providers match energy levels, pulse counts, and session frequency to your specific condition based on published evidence, then fine-tune the approach using real-time patient feedback. If your provider cannot explain what settings they use and why, that is worth questioning.

References

Gerdesmeyer L, Frey C, Vester J, et al. Radial extracorporeal shock wave therapy is safe and effective in the treatment of chronic recalcitrant plantar fasciitis. Am J Sports Med. 2008;36(11):2100-2109. PubMed
Korakakis V, Whiteley R, Tzavara A, Malliaropoulos N. The effectiveness of extracorporeal shockwave therapy in common lower limb conditions: a systematic review including quantification of patient-rated pain reduction. Br J Sports Med. 2018;52(6):387-407. PubMed

Medical Disclaimer: This content is for informational purposes only and does not constitute medical advice. Shockwave therapy outcomes vary by individual and condition. Consult a qualified healthcare provider to determine if shockwave therapy is appropriate for your situation.