Postpartum comebacks aren’t linear, and professional trail runner Dr. Megan Roche just proved why uphill treadmill workouts might be the secret weapon athletes have been missing.
In a recent video on the Some Work, All Play YouTube channel, Roche tackled one of her hardest threshold sessions: 12 x 5 minutes at 8% grade.
After two postpartum buildbacks, heart issues, and hamstring surgery, she’s rebuilding her running career one grinding treadmill interval at a time.
And the workout she swears by might just revolutionize how runners train.
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Why Uphill Treadmill Threshold Training Works
Roche, along with her husband and coaching partner David Roche, has made uphill treadmill running a cornerstone of training for professional and everyday athletes alike. The reason? Maximizing aerobic stress while dramatically reducing impact.
This isn’t about chasing speed. Running at an 8% incline allows athletes to accumulate enormous training volume without the pounding that outdoor threshold runs deliver.
Coming back postpartum I’ve done like 80% of my workouts now uphill just because it’s like the entire year postpartum you’re at higher risk for injury and so it’s been so nice to like get to offload it and I look forward to these.
For Roche, an MD-PhD who now coaches full-time instead of practicing medicine, these sessions feel controlled and sustainable in ways outdoor tempo runs never could.
The Magic 8% Gradient
Why 8%? The Roches have found this gradient hits a sweet spot—enough incline to reduce impact significantly, but not so steep that power demands override aerobic benefits.
David Roche explained that uphill treadmill threshold allows athletes to stack more quality work into one session than would ever be possible outdoors. Attempting this workout on roads or trails would be, in his words, “a recipe for injury.”
You think about the magic of this is that you’re doing a session that would be unachievable outside because if you did it outside your body would be broken down and you’d have to slow down so much that it would make you uneconomical even if you didn’t get injured.
Advanced athletes can handle this type of workout twice per week without breaking down—something nearly impossible with outdoor tempo sessions.
Inside Megan’s 12 x 5 Minute Threshold Session
Roche’s workout structure is deceptively simple but brutally effective:
- Warm-up: Easy jog to get into low Zone 2
- Work intervals: 5 minutes at controlled threshold effort (upper 150s to low 160s heart rate initially, progressing into the 160s)
- Recovery: 2 minutes easy at 8% grade, allowing heart rate to drop to low 140s
- Fueling: 130 grams of carbohydrates per hour during the session
She doesn’t program pre-set paces. Instead, Roche runs the workout manually, watching her heart rate on her Garmin and adjusting effort based on feel.
I actually enjoy staring at my heart rate. It’s like something that I actually like some people watch TV. I listen to music and just watch my heart rate on the Garmin the whole time.
For beginners, the Roches recommend starting with just 15 to 20 minutes of total work and building gradually. Advanced athletes can peak at about an hour of total threshold work.
The Mental Grind Sets In Around Rep Eight
By interval eight of twelve, Roche described a full-body fatigue setting in. “Grindy” became her word of choice—legs heavy, breathing controlled but labored, everything requiring deliberate focus.
Still, she emphasized how much more manageable this felt compared to equivalent outdoor threshold work. The consistent grade, controlled environment, and reduced impact allow athletes to push deeper aerobically.
Once you get to like rep eight, you’re like there’s almost this full body fatigue feeling like it’s like kind of grindy in the legs. I think grindy is probably the best term.
She also noted the session doubles as exceptional GI training—practicing race-day fueling without the stomach jarring that comes with downhill running.
Why This Matters for Postpartum Athletes
Roche’s return to elite running hasn’t been straightforward. After winning both USATF sub-ultra and ultra runner of the year in 2016, she faced heart issues, two pregnancies, hamstring surgery, and multiple rebuilds from scratch.
Uphill treadmill training became her pathway back because injury risk remains elevated for an entire year postpartum. Offloading impact while maintaining high aerobic stimulus allowed her to train hard without breaking down.
You go from doing a 10 by 1 minute walk to all of a sudden running continuous and that’s a celebration to building up to 4x 5 minutes on the treadmill and that’s a celebration to 6x 5 minutes to 8 by 5 minutes and then you get to today and you’re like that’s the accumulation of so many different bricks.
Her approach celebrates incremental progress. Each small brick—whether walk-run intervals or adding two more reps—builds toward something greater.
Redemption and Unrealized Potential
At 35, Roche carries different motivations than her 25-year-old self. She described her younger competitive fire as intense—“a Michael Jordan mindset of wanting to be the best version of myself at all times, but also just beat everyone all the time.”
Now, after stepping back from sport multiple times, she’s found something more sustainable: genuine enjoyment paired with self-compassion.
I genuinely enjoy it a lot more and I think I’m a much happier version of myself than at age 25 when I was just like performance and results define me so much.
She also spoke about unrealized potential—how she still dreams about what could have been in field hockey, and how she refuses to have those same regrets with ultrarunning.
I really want to do that ahead and I want to do that for the next 10 years ahead and just like see what’s possible and look back without having regrets.
Practical Takeaways for Your Training
Whether postpartum, aging, injury-prone, or simply looking to stack more quality work, uphill treadmill threshold offers benefits outdoor running cannot match.
- Start conservatively: Begin with 15-20 minutes total work, build to 60 minutes over months
- Use 8% grade: Balances aerobic stimulus with reduced impact
- Run by feel and heart rate: Manual control allows intuitive pacing adjustments
- Recovery matters: Drop grade or pace on recovery intervals if heart rate won’t come down
- Fuel appropriately: Practice race nutrition during longer sessions
- Never replicate outdoors: This volume at threshold on roads or trails invites injury
After completing her 12th interval, Roche hit a max heart rate of 176 and logged nearly an hour of threshold work. She described her legs as “soupy” but celebrated the fatigue as evidence of work well done.
I look at today and I’m like well that’s the reason why we do this like just even for the feeling of like being down there and being like, I did it.
For athletes rebuilding, returning, or simply seeking smarter training, Roche’s uphill treadmill approach proves that progress doesn’t require punishment—just consistent, intelligent effort stacked brick by brick.
