01·Course Characteristics
A deceivingly flat cross-border course where relentless headwinds and continuous pedaling replace mountain climbs as the primary physical test.
There's still hope!
The ideal build for this course is 16 weeks, and you have 7. We'll compress the essentials into your remaining time, prioritizing the demands that matter most on this course to get you to the finish line.
02·Course by Section
A single-loop, point-to-point swim in the calm, flat waters of the historic Damse Vaart canal. The course is protected from ocean swells, offering an ideal environment for a fast time. Stay in the center to avoid algae along the banks.
An exceptionally flat single loop crossing the Belgian-Dutch border three times. While the asphalt is mostly smooth, you must negotiate sharp village turns, short cobblestone sectors, and relentless coastal winds.
A flat, three-loop run along the open sea dike promenade, heavily exposed to North Sea winds and direct sunlight. Massive crowd support lines the paved course, driving high energy.
03·AVG beginners' Training Timeline
Because this course is extremely flat, you will be pedaling constantly without coasting. This 16-week plan focuses on building the unique isometric muscular endurance needed to stay aero for 90 km, alongside high-cadence run durability to withstand the exposed coastal elements.
Aerobic Base & Mobility
Build aerobic capacity and hip flexor mobility to prepare for flat, continuous effort.
Isometric Aero Strength
Develop lower back and core strength to hold the aerodynamic tuck comfortably.
Wind & Pace Specificity
Simulate flat, non-drafting efforts with sustained high-cadence pedaling under fatigue.
Taper & Logistical Readiness
Reduce volume to peak physically while finalizing your nutrition and split-transition strategy.
Adapts to your fitness, schedule & recovery every week.
Personalize this timeline04·Race-Day Execution
Expect breezy conditions with morning lows of 13°C and afternoon highs of 19°C. Prepare for a 25-30% chance of light rain and coastal winds up to 24 km/h.
Consume 80 to 100 grams of carbohydrates per hour on the bike. Secure your hydration bottles tightly to prevent them from launching off on the historic cobblestone sectors.
Maintain a steady, controlled effort on the flat bike leg without coasting, as zero descents mean constant muscle tension. Save matches for the windy, exposed run on the promenade.
Prepare for a split-transition race. You must check in your bike and T1 gear in Sluis, and your T2 gear in Knokke-Heist the day before.
The water temperature in the freshwater Damse Vaart canal typically ranges from 17°C to 19°C (62°F to 66°F) in early September, making the swim reliably wetsuit-legal. Since this is a calm, flat canal swim, you will not have to worry about ocean swells, but you should aim to stay near the center of the canal to avoid any algae build-up along the banks.
The bike course is rated as moderate because while it is exceptionally flat with only 44 m to 143 m of total elevation gain, it is highly exposed to strong North Sea winds averaging 10 to 15 mph. Furthermore, because there are no long descents, you must pedal continuously without any opportunities to coast, which accumulates muscle fatigue differently than a hilly course. You will also need to navigate short Belgian cobblestone sections and sharp turns in historic villages along the single 90 km loop.
Because T1 is located in Sluis (Netherlands) and T2 is 10 km away in Knokke-Heist (Belgium), you must check in your bike and T1 gear in Sluis, and your T2 gear in Knokke-Heist the day before the race. On race morning, parking is available near the swim start in Sluis, and spectators should utilize the local trains or the Belgian Coastal Tram to travel to the finish line in Knokke-Heist, where parking is highly restricted.
The 21.1 km run is an extremely flat, 3-loop course on a completely paved surface, featuring less than 30 meters of cumulative elevation gain. The route takes you through Generaal Willemspark and onto the wide, open Zeedijk pedestrian promenade, which is highly energetic and packed with spectators. However, the promenade is heavily exposed to direct sunlight and coastal winds, with only occasional pockets of shade provided by beachfront buildings.
Since the 90 km bike course is entirely flat, you will be locked into your aerodynamic position for long stretches, placing continuous pressure on your lower back and hip flexors. You should practice taking in 80 to 100 grams of carbohydrates per hour and hydrating while fully aero, as the lack of natural coasting makes continuous fueling essential. Be sure to secure your bottles tightly to prevent them from launching when you hit the short, authentic Belgian cobblestone sections.
Your Personalized Plan
FE26 builds your plan around your Strava data, your real schedule, and the exact demands of IRONMAN 70.3 Knokke-Heist — then adapts every week to how you actually perform.
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