29 Day Holistic Fitness & Yoga Retreat, Koh Samui, Thailand

Four weeks is the longest of the four Visit Natural Detox packages and the one that makes sense if the goal is a changed routine rather than a holiday with exercise in it. The weekly structure never varies: cardio Monday to Saturday at 7am, yoga Monday to Friday at 11am under rotating teachers covering Hatha, Vinyasa, Yin and Restorative, and strength and conditioning Monday to Friday with Coach Netta. One Muay Thai class, one meditation workshop, one breathwork session and one ice bath land each week. Twenty-eight nights means four full cycles of that, which is where most people stop treating the 7am start as negotiable.

Airport pickup and drop-off are included at this length, along with a welcome drink, transport during the retreat, parking and luggage storage. The resort sits on Koh Samui a walk from the beach, the jungle trails and the local shops and markets, with rooms overlooking a pool garden and the open-air Wild Tribe Cafe serving as the social hub.

Groups stay small at 10 to 20 people and roughly 90% of guests arrive alone, with ages from the early twenties to past 60. Check-in and check-out are Sundays. Coaches adapt to the individual rather than running a boot camp — the working fitness bar is walking hilly terrain at normal pace for around an hour.

Watch out: Meals are not included. Over 28 nights that is a substantial running cost, and it is the single line that makes the shorter 22-day all-inclusive at $2,963 worth comparing against this $2,305 — that package covers three meals a day, weekly massages and a spa day for a week less time.

Insider Tip: The operator’s low season, 1 September to 16 December, is the cheapest window and also the wettest — Samui sits on the Gulf coast, where the monsoon runs roughly October to December rather than the May-to-October pattern of Phuket and the Andaman side. Four weeks starting in October will include rain; four weeks from January will not.

Shorter runs of the same programme: 15-day from $1,257 and 22-day from $1,916, both without airport transfers.