The Land Transport Authority has officially designated the underground trek between station platforms as a "low-intensity endurance trial" for the weak.

Commuters are advised to pack camping gear and legal wills before attempting the three-day journey from the North-South Line to the Circle Line.

Transport officials claim the sweat-soaked ordeal provides a free sauna experience, saving the peasants from expensive gym memberships.

"Wah lau, I just want to go Suntec only, now my calf muscle big like siew yoke uncle," complained local resident Gary Lim.

"LTA say 'seamless connectivity' but my shoe spoil until can see my toes already, damn siao one!"

Authorities confirmed that anyone collapsing from exhaustion will be recycled into the concrete foundations of the Cross Island Line.