Sauna & Cold Plunge Day Pass

A one-hour day pass providing access to the Finnish sauna and cold plunge pools. The contrast therapy protocol alternates between heat exposure in the sauna and cold immersion, a practice with well-documented effects on circulation, inflammation, and autonomic nervous system regulation.

Contrast therapy — alternating between sauna heat and cold water immersion — is one of the oldest and most widely practised recovery protocols. At Healthy Horizon, the day pass provides a full hour of self-directed access to both the Finnish sauna and cold plunge pools, allowing guests to cycle through multiple rounds at their own pace. The physiological mechanism is straightforward: heat exposure in the sauna drives peripheral vasodilation, increases heart rate, and activates heat shock proteins involved in cellular repair. Cold immersion triggers rapid vasoconstriction, norepinephrine release, and a sympathetic nervous system response that many users describe as an immediate improvement in alertness and mood. The alternation between the two creates a cardiovascular workout effect without mechanical stress on joints or muscles. Regular contrast therapy practice has been associated in research literature with improved cardiovascular function, reduced markers of systemic inflammation, enhanced recovery from exercise, and improved sleep quality. The day-pass format at Healthy Horizon makes this accessible without a membership commitment — visitors can walk in, complete a session, and leave without ongoing obligations. The facility's central Lisbon location and seven-day-a-week schedule make it practical for both residents and visitors to the city.