Why Flat-City Training Doesn't Prepare You for a Hilly Course
Running fitness built entirely on flat terrain transfers less to a hilly course than most runners expect, because uphill and downhill running load the body in ways flat running simply doesn't ask for. Climbing recruits the calves, Achilles tendon, and hip flexors concentrically in a way flat pace rarely does, while descending asks the quadriceps to absorb impact eccentrically -- the kind of muscle action that causes disproportionate soreness in runners who haven't trained it, even ones with strong flat-ground fitness.
A course like the Travis Hegel Marathon du Trans Penang or the Khao Yai Marathon exposes this gap quickly: runners arriving from Singapore, Bangkok, or Jakarta with a flat-city base often find their heart rate and perceived effort climb much faster on sustained grades than their flat-pace fitness would predict, and the downhill sections afterward leave their quads far more trashed than a flat race of the same distance ever would. The fix isn't running further on flat ground -- it's finding some form of vertical loading before race day.
Building a Vertical Substitute Route in a Flat City
Parking garages are one of the most reliable substitutes available in a dense Southeast Asian city -- most shopping malls and office towers have multi-story ramps that are quiet outside of business hours, offer a consistent, repeatable gradient, and can be looped for sustained climbing in a way a single overpass can't match. Running the ramp up and walking or jogging the ramp down for 20-40 minutes builds real climbing fitness that a flat park loop never will.
Pedestrian overpasses and flyovers -- a fixture of dense Southeast Asian cities built to get people across highways and major junctions -- are a shorter but still useful substitute, especially clustered together into a repeat-hill workout: running six to ten overpasses back to back, with the flat street sections between them as active recovery, approximates the up-down rhythm of a genuinely hilly course better than any single flat run. Stadium stairs, where public access allows, add another option and are particularly good for shorter, sharper climbing efforts.
Using Treadmill Incline as a Controlled Alternative
A treadmill set to a meaningful incline -- 4 to 8 percent for sustained efforts, higher for shorter intervals -- is the most controllable way to simulate hill-specific loading, because the gradient and pace stay fixed regardless of outdoor terrain, weather, or traffic. Unlike an overpass or ramp workout, a treadmill session can hold a specific incline steady long enough to build real muscular adaptation rather than a series of short bursts.
A useful structure for a flat-city runner without regular hill access is a weekly incline session -- for example, 30-40 minutes alternating 3-5 minutes at a 5-6 percent incline with 2-3 minutes flat -- building the sustained climbing muscles a race like the Khao Yai Marathon demands, without needing to leave the gym or find a ramp at all. The one thing a treadmill can't replicate is the eccentric quad loading of a real downhill, so combining incline sessions with occasional stair descents helps cover that gap too.
Adjusting Race-Day Expectations When You Can't Fully Replicate Hills
Even a runner who's done everything right with ramps, overpasses, and treadmill incline sessions should still expect a hillier course to run slower than flat-city pace would suggest, and building that expectation in before race day protects against a demoralizing pace collapse on the climbs. Effort-based pacing -- running by perceived exertion or heart rate rather than a flat-course goal pace -- matters more on a hilly course than almost anywhere else, since holding a flat-pace number uphill usually means blowing up well before the finish.
For a runner who genuinely couldn't get any hill-specific training in before a race like the Travis Hegel Marathon du Trans Penang, walking the steepest sections deliberately -- rather than trying to run through them and burning out -- is a legitimate strategy, not a failure: many experienced hilly-course finishers walk short, steep stretches on purpose to save the legs for the flatter or downhill sections where that saved energy pays off. Treating hills as an effort problem rather than a pace problem is the single biggest race-day mindset shift a flat-city runner needs to make.