Learn About Health Technology

Practical how-to guides and evidence-based deep dives on the science behind the devices. Every article draws on published peer-reviewed research, manufacturer data, and aggregated expert opinion — GreatHealthGear does not conduct its own clinical research.

55 articles across 11 categories

Browse by Category

Sleep Trackers

Rings, watches, and under-mattress sensors that analyse your sleep stages and recovery.

8 articles

Smart Scales

Body composition scales that track weight, body fat, muscle mass, and more.

4 articles

Massage Guns

Percussive therapy devices for muscle recovery, soreness, and warm-up routines.

5 articles

Red Light Therapy

Panels and devices using red and near-infrared wavelengths for recovery and skin health.

5 articles

Cold Therapy

Ice baths, plunge tubs, and cold water immersion equipment for recovery.

5 articles

Heat Therapy

Sauna blankets, portable saunas, and infrared devices for muscle recovery.

4 articles

Recovery Boots

Pneumatic compression boots and sleeves for circulation and post-exercise recovery.

4 articles

Home Saunas

Traditional and infrared home saunas for heat therapy at home.

6 articles

EMS Devices

Electrical muscle stimulation devices for strength training and recovery.

5 articles

TENS Devices

Transcutaneous electrical nerve stimulation units for pain management.

4 articles

Breathwork & Recovery

Breathing trainers and guided breathwork tools for performance and recovery.

5 articles

Recent Articles

How-To Breathwork & Recovery

How to Choose a Breathwork Device: A Practical Buying Guide

Breathwork devices split into three distinct categories — respiratory muscle trainers, HRV biofeedback devices, and CO₂ tolerance tools — and each trains a different physiological system. Buying the wrong category for your goal produces limited results regardless of device quality. This guide walks you through a clear decision framework: identify your primary goal first, then match device to goal, then choose within budget.

9 min read

Research Breathwork & Recovery

Breathwork for Athletes: Performance, Recovery & the Evidence

Breathwork for athletes divides into three distinct applications — inspiratory muscle training (IMT) to delay respiratory muscle fatigue during effort, heart rate variability (HRV) biofeedback for autonomic recovery between sessions, and CO₂ tolerance work for breathing economy. Each targets a different physiological system, and the evidence strength differs substantially between them. This article covers what the research supports, what it does not, and how to structure a sensible athletic breathwork programme.

11 min read

Research Breathwork & Recovery

HRV Biofeedback Explained: Coherence Training, Mechanisms & Evidence

Heart rate variability (HRV) biofeedback is an active intervention: you breathe according to real-time HRV feedback to guide your autonomic nervous system toward a coherent, high-HRV physiological state. It is distinct from passive HRV tracking — devices like Oura Ring or WHOOP measure resting HRV as a readiness metric, while HRV biofeedback devices train your autonomic response through guided breathing practice. The evidence base is most developed for HeartMath's specific coherence training model, which has 30 years of peer-reviewed research behind it.

10 min read

Research Breathwork & Recovery

Nasal vs Mouth Breathing: What the Research Shows

Nasal breathing and mouth breathing are physiologically distinct. The nose filters, humidifies, and conditions inhaled air; produces nitric oxide that dilates bronchi and pulmonary vessels; and drives a slower, deeper respiratory pattern. Mouth breathing bypasses these functions and is associated with worse outcomes across sleep quality, exercise economy, and dental and craniofacial health. The evidence base for nasal breathing training is real but frequently overstated — this article covers what the research actually supports.

10 min read

Research Breathwork & Recovery

What Is Respiratory Muscle Training? Science, Evidence & Methods

Respiratory muscle training (RMT) applies progressive resistive load to the breathing muscles — primarily the inspiratory muscles (diaphragm, intercostals, scalenes) and sometimes the expiratory muscles — to increase their strength and endurance. The concept is straightforward: breathing muscles can be trained the same way as limb muscles, and stronger, more fatigue-resistant breathing muscles improve performance in activities where breathing becomes a limiting factor. The evidence base for inspiratory muscle training in particular is one of the stronger published bodies of evidence in consumer breathwork.

11 min read

How-To EMS Devices

How to Choose an EMS Device: The Practical Buyer's Framework

Choosing an EMS device comes down to four decisions: how many channels you need, whether wireless freedom matters, what programmes are essential for your training goals, and what your budget allows. This guide walks through each decision clearly so you end up with the right device rather than the most expensive one.

9 min read

Why We Cover the Science, Not Just the Specs

Manufacturer marketing tends to overstate what health devices can do — "clinically proven", "boosts metabolism", "optimises recovery" — without pointing to the research behind those claims. The articles in this section exist to cut through that, explaining what independent studies actually show about sleep tracking accuracy, cold and heat exposure, percussive therapy, red light wavelengths, electrical stimulation, and breathwork training.

Each piece is written to help you make an evidence-based decision: how a technology works, what the research supports, where the evidence is still thin, and how to use a device safely and effectively once you own one. Where a claim is well-supported, we say so. Where it isn't, we say that too.