Devices for applying pneumatic waveform compression to a subject's limbs for treating medical conditions and as a recovery aid for athletes; massage appliances; manual massage instruments; instruments for massage; vibration generating apparatus for massage; electrically operated massagers; massage apparatus (for medical purposes); electric massage apparatus for personal use; limb compression instruments; air inflatable limb compression apparatus; orthopaedic compression supports; medical compression stockings; compression socks for medical or therapeutic use