Sleep, light, heat, cold, breath and other evidence-informed methods for improving how you feel and perform.
What to look for
Each entry below covers one widely used method — what it is and what published trials, reviews and consensus statements report, including where the evidence is thin — with references at the end of every page.
Top picks
Nine widely used methods, each summarised from published trials and reviews.
Recovery method
Cold Water Immersion
Ice baths and cold plunges, assessed in a Cochrane review and in trials on strength adaptation.
Learn more ↗Recovery method
Sauna Bathing
Regular heat exposure, studied in a large Finnish cohort published in JAMA Internal Medicine and a systematic review.
Learn more ↗Mind-body method
Breathwork
Slow, deliberate breathing practices, assessed in a meta-analysis of randomised trials in Scientific Reports.
Learn more ↗Mind-body method
Mindfulness Meditation
Attention-training practice, assessed in a JAMA Internal Medicine systematic review of 47 trials.
Learn more ↗Circadian method
Morning Light Exposure
Using bright daylight to anchor the body clock, as described in a published review of light's effects on circadian rhythms.
Learn more ↗Circadian method
Sleep Extension & Consistency
Treating sleep as trainable, anchored in the joint AASM and Sleep Research Society consensus statement.
Learn more ↗Circadian method
Napping
Short daytime sleep, assessed in a systematic review of napping behaviour and athletic performance.
Learn more ↗Metabolic method
Time-Restricted Eating
Compressing the day's food into a set window, reviewed by de Cabo and Mattson in the New England Journal of Medicine.
Learn more ↗Mind-body method
HRV Biofeedback
Training slow breathing against a live heart-rate-variability readout, assessed in a meta-analysis in Psychological Medicine.
Learn more ↗Recovery method
Whole-Body Cryotherapy
Brief exposure to extremely cold air in a chamber, assessed in a Cochrane systematic review.
Learn more ↗Circadian method
Bright Light Therapy
Timed exposure to bright artificial light, assessed in the American Journal of Psychiatry meta-analysis of mood-disorder trials.
Learn more ↗Recovery method
Photobiomodulation (Red & Near-Infrared Light)
Red and near-infrared light applied to tissue, assessed in a meta-analysis of muscle performance and fatigue trials.
Learn more ↗Mind-body method
Yoga Nidra & NSDR
Guided lying-down relaxation — popularised as non-sleep deep rest — with published trials on stress and sleep.
Learn more ↗Metabolic method
Exercise Snacks (VILPA)
Brief bursts of vigorous everyday activity, studied in a Nature Medicine wearable-data cohort of over 25,000 adults.
Learn more ↗Performance method
Strategic Caffeine Use
Dosing and timing caffeine for performance and sleep, anchored in the ISSN position stand and a controlled sleep trial.
Learn more ↗Mind-body method
Cyclic Sighing
The double-inhale, long-exhale breathing pattern, tested against mindfulness in a Stanford randomised trial.
Learn more ↗This section reports what published research says; it is general information, not medical advice. Heat, cold and fasting practices carry documented cautions for some conditions — speak to a qualified clinician before starting if any apply to you.
