MFLH HYROX Engine Builder

MFLH

Coach
Stephen Pelkofer

This 12-week program is designed for beginner to intermediate endurance athletes and HYROX competitors looking to enhance their aerobic endurance while preparing for a HYROX race.

The primary goal is to build a strong aerobic foundation, improve your threshold running, and gradually transition into race-specific training to peak at just the right time. By the end of this plan, you’ll feel stronger, faster, and ready to dominate your next HYROX race.

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Running Progressions
Safely build running volume through threshold work, aerobic work, and minimal doses of speed.
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HYROX Specific Cross Training
Simple ski, row, and burpee progressions to build aerobic fitness and better movement efficiency.
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Base Build and Race Specificity
Train for the demands of the race after the foundation has been built.
Features
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Programming 5 days per week
Running and cross training progressions for the beginner to intermediate level runner and HYROX competitor.
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Delivered through TrainHeroic
All workouts are programmed and available in the TrainHeroic app.
Equipment
Required
Ski Erg // Rower // Dumbbells // Running Shoes
Recommended
Sled // Sled Rope // Assault or Echo Bike // Stationary Bike
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Sample Week
Week 1 of 12-week program
Sunday
20 min Run Time Trial

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20 min run test for max distance covered. This can be done outside on flat ground or a treadmill (motorized or manual). Note: Ensure a proper warmup is completed before starting the time trail

Tuesday
Cross Training: 20 min Row-Ski

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20 min AMRAP (as many rounds as possible) 500m row 500m ski Note: You can sub out either machine with a stationary bike or air bike.

Wednesday
20 min Aerobic Run with Strides

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20 min aerobic run At the end, complete 4x15s strides at mile pace with 2 minute jog in between each rep. Total running time for this workout should be around ~30 min

Friday
20 min Aerobic Run with Strides

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20 min aerobic run At the end, complete 4x15s strides at mile pace with 2 minute jog in between each rep. Total running time for this workout should be around ~30 min

Coach
coach-avatar Stephen Pelkofer

Stephen has stood on the HYROX podium five times and has a Men's Pro personal best of 59:41. He finished 47th in the world at the 2025 HYROX World Championships as well as 17th in the world in Mens Pro Doubles. Stephen now brings his experience, proven race strategies, and championship-level training insights to our MFLH community.

FAQs
Can I add more workouts on top of this program?
Yes! This plan is good to add on top of your existing strength training. While it is not advised to add in additional intense running sessions, adding more easy running or easy low-impact cardio (rowing, skiing, biking) is a good idea – as long as you are able to recover well from those sessions.
Should I use a treadmill or run outside for specific workouts?
You should try to do at least 50% of your running outside to simulate real running. For interval running sessions, it is a good idea to do those on a motorized treadmill so that you can control the pace. We recommend doing most of the aerobic (easy) running outside on the roads or trails.
What if I don’t have the equipment necessary?
In the plan, we include optional substitutes for things like sled push, sled pull, and ski erg if you do not have the equipment or is is not feasible to complete the workout in your gym space.
MFLH HYROX Engine Builder