For travellers wanting to keep up a fitness routine, Phuket has both genuine hazards and real options worth knowing about.
Where it's safe(r) to run
Beachfront promenades where they exist, quieter inland roads around Kathu and Chalong, and dedicated park loops (where available) are considerably safer than running along the main coastal roads, which carry heavy, fast traffic with minimal pedestrian infrastructure.
Heat and timing
Early morning, before roughly 8-9am, is the only genuinely comfortable window for outdoor exercise most of the year — heat and humidity make midday activity considerably more demanding than it might look on paper.
Gyms
Most resorts and hotels include a gym, and standalone commercial gyms exist in the main tourist and residential areas, generally offering day passes for non-guests — useful for longer stays or travellers wanting a proper weights setup beyond a hotel's basic equipment.
Combining fitness with local activities
Muay Thai training (see our Muay Thai guide) and yoga (see our yoga guide) are popular alternatives to a standard gym routine, genuinely tied to the local culture rather than just importing a home fitness habit.