Back in 2010, Frank and colleagues published Biofeedback in medicine: who, when, why and how? — an article that still feels strikingly relevant today. This piece wasn’t about presenting a shiny new gadget. Instead, it reminded us that biofeedback is less about machines, and more about making hidden physiological processes visible, trainable, and ultimately under voluntary control.

If you think about it, most professionals in healthcare, psychotherapy, or coaching already use some form of biofeedback — only without the electrodes. When a therapist guides a client to “take a deep breath and notice your body calm down,” or when a physician encourages a patient to “check in with muscle tension and relax,” that’s biofeedback. The missing link is measurement. Instruments provide the precise, real-time mirror that transforms subjective sensations into objective data.

This distinction matters. Without feedback, patients often rely on vague cues or delayed effects. With feedback, they see exactly how their physiology shifts in the moment — heart rate slowing, skin conductance dropping, EMG activity relaxing. It’s like the difference between guessing your golf swing is improving and seeing the ball land exactly where you aimed.

Frank and colleagues frame biofeedback not as a treatment in the traditional sense, but as a training in self-regulation, much like learning to play an instrument or speak a new language. It requires practice, repetition, and a willingness to engage actively in the process. And in the context of medicine, this shift from passive recipient to active participant is transformative.

Methods

The article outlines two major models of biofeedback training:

1. Operant Conditioning & Feedback Learning

In this approach, patients learn through reinforcement. When the feedback signal (say, EMG activity from tense muscles) moves in the desired direction, the display provides immediate positive reinforcement — a sound, a color shift, or a game-like reward. Over time, the body learns to reproduce this healthier pattern.

The analogy offered is putting a golf ball. Watching where the ball lands provides feedback that shapes the next stroke. In biofeedback, the body learns in a similar way, guided by immediate, objective signals.

2. Psychophysiological Psychotherapy

Here, biofeedback is integrated with stress management and psychological insight. Patients not only see their physiology react to stressors (like the Stroop test or mental arithmetic) but also learn how thoughts, emotions, and behaviors interact with their physiology. This model is particularly effective for conditions with strong stress components.

Training Process

Sessions are structured more like lessons than treatments:

• Education: Patients are introduced to sensors and signals, reassured that these tools only record, never shock.

• Feedback: Physiological signals (muscle tension, HRV, temperature, skin conductance) are displayed in real time.

• Practice: Patients experiment with relaxation, imagery, or cognitive strategies to modulate signals.

• Reinforcement: Therapists highlight successes, reinforcing the sense of mastery and control.

What’s striking is how familiar this looks to many clinicians. Breathing retraining, progressive muscle relaxation, guided imagery — all are core to psychophysiology. The difference is that biofeedback transforms these into quantifiable skills, not just subjective experiences.

Results

One of the most enduring contributions of this article is its summary of efficacy ratings established by Yucha & Montgomery (2008). Using rigorous criteria set by the Association for Applied Psychophysiology and Biofeedback and the Society for Neuronal Regulation, biofeedback was evaluated across a wide spectrum of conditions:

• Level 5 (Efficacious and specific): Female urinary incontinence.

• Level 4 (Efficacious): ADHD, anxiety, chronic pain, adult headaches, hypertension, Raynaud’s disease, temporomandibular disorders, epilepsy.

• Level 3 (Probably efficacious): Alcoholism/substance abuse, arthritis, diabetes, pediatric headaches, stroke recovery.

• Level 2 (Possibly efficacious): Asthma, depression, fibromyalgia, IBS, PTSD, cerebral palsy, cystic fibrosis.

• Level 1 (Not empirically supported): Conditions like eating disorders, spinal cord injury, or immune function (due to lack of studies, not evidence of harm).

These ratings underscore both the strengths and the gaps in research. Importantly, Frank and colleagues stress that lower ratings don’t mean biofeedback is ineffective — only that research hasn’t caught up. Clinically, many patients still benefit, especially when biofeedback is combined with standard medical care.

Brendan's comment: It's really important to note that the the field has greatly evolved over the past 15 years; not to mention the evidence of efficacy for a multitude of applications. The latest update to the listings is the 4th edition of Evidence-Based Practice in Biofeedback and Neurofeedback published by the AAPB.

Discussion

The brilliance of this paper is how it reframes biofeedback not as “alternative medicine,” but as applied learning science.

Think about it: a physician might tell a patient with hypertension to relax. A psychologist might teach deep breathing. A physical therapist might coach muscle release. All of these are biofeedback in principle. The difference lies in precision. With sensors, the patient can see: “Ah, when I exhale slowly, my HRV improves instantly.” The feedback is objective, immediate, and tailored.

This is why biofeedback often works where advice alone fails. It closes the loop between intention and physiology. It also empowers patients: they don’t just comply with a recommendation, they learn mastery over their own systems.

For clinicians, the integration of biofeedback means adding tools, not abandoning old ones. The same relaxation techniques, imagery exercises, and stress management strategies apply — but now with a mirror that shows exactly what’s happening under the surface.

At a systems level, biofeedback’s rise also reflects broader trends:

• Growing patient demand for complementary and integrative care.

• Recognition by institutions like the NIH that biofeedback belongs within mind–body medicine.

• The increasing affordability and portability of biofeedback equipment, bridging lab and clinic.

Looking ahead, this framing — clinicians already “do” biofeedback, equipment makes it measurable — could be the bridge for wider adoption across healthcare disciplines.

Brendan’s Perspective

Most of the professionals who come to me for their neurofeedback education already practice forms of biofeedback on a daily basis. Most just don't realise it. Biofeedback is a whole lot more than just "operant conditioning" and those who reduce it to such a bland and mundane method (*cough* non-clinical researchers *cough*) have it all wrong.

Go back up to the methods section. There are two models of biofeedback according to this paper. In my humble opinion, it's not one or the other; it's both. Each and every time.

A psychologist helps a client track their anxiety cues. A coach teaches athletes to stay calm under pressure. A doctor advises paced breathing for blood pressure. What changes when we introduce equipment isn’t the philosophy — it’s the clarity of the feedback.

For example, I’ve worked with clients using heart rate variability (HRV) biofeedback. Many of them had “practiced breathing” for years, yet couldn’t sustain calm under stress. Once they saw the HRV curve responding in real time — how slow, coherent breathing stabilized the system — it clicked. The invisible became visible. The learning stuck.

EEG-neurofeedback adds another layer of depth. Protocols such as:

• SMR training: often enhances behavioral inhibition, useful for ADHD and impulse control.

• Alpha enhancement: supports relaxation and anxiety reduction.

• Theta/beta training: improves focus and reduces inattention.

What strikes me is that even without equipment, clinicians already cue these states. Therapists ask clients to focus, relax, or let go. But with EEG-neurofeedback, the brain sees itself, and this turns subjective states into trainable, lasting skills.

Another key element is individualization. Two patients with “anxiety” might present completely differently in their EEG profiles. One might benefit from downtraining excessive beta activity; another from enhancing alpha. Equipment gives us the map to tailor interventions precisely, whereas traditional methods rely more on intuition. Both matter — but together, they’re unstoppable.

I also often integrate biofeedback with complementary approaches. For instance:

• Pairing HRV training with meditation, hypnosis or mindfulness practices.

• Combining EEG-neurofeedback with psychotherapy for depression or trauma.

• Using EMG feedback alongside physical therapy for stroke rehabilitation or chronic pain.

In practice, this integration isn’t about adding complexity — it’s about building a more responsive, individualized learning environment. Patients leave not only with symptom reduction but with skills they own for life.

Research often struggles to capture this richness. Clinical protocols are highly individualized, while research designs crave standardization. This mismatch sometimes produces disappointing trial results. But anyone who has sat in a biofeedback session, watching a patient’s physiology shift in real time, knows the transformative potential.

To me, that’s the message Frank and colleagues seeded in 2010: you’re already practicing biofeedback. Add the equipment, and you’ll sharpen your tools, empower your patients, and accelerate learning.

Conclusion

Frank et al. (2010) gave us a clear reminder: biofeedback is not something exotic. It is what clinicians already do — only sharper, clearer, and more precise with the help of technology.

By making the invisible visible, biofeedback empowers patients, supports clinicians, and builds bridges between traditional and integrative medicine. In an era where patients crave both agency and evidence, biofeedback may be one of the most practical tools for uniting the art and science of care.

Take-home message: Biofeedback doesn’t replace what you already do — it makes it measurable, faster to learn, and more enduring.

Reference

Frank, D. L., Khorshid, L., Kiffer, J. F., Moravec, C. S., & McKee, M. G. (2010). Biofeedback in medicine: who, when, why and how? Mental Health in Family Medicine, 7(2), 85–91. https://doi.org/10.1002/mhfm.07.085