Blog 4: Everything Running
Part 4: Building Your Running Body — Strength, Cross-Training & Load Management
Welcome back to Everything Running. We've covered injury patterns in Part 1, mechanics in Part 2, and the mental game in Part 3. Now we're getting into the structure that holds it all together, how you actually build a body capable of handling consistent, progressive running without constantly breaking down.
Most runners follow a plan. Far fewer understand why the plan is built the way it is. And almost none are doing the off-running work that determines how well their body absorbs what they ask of it. Let's change that.
Load Management: The Variable Most Runners Underestimate
Training load is not just your weekly kilometre count. It's the combination of volume, intensity, frequency, and recovery, and how those factors interact over time. When your recent training load spikes significantly above your rolling average, injury risk increases sharply. This is consistent across every endurance sport and every level of athlete.
Key load management principles:
Increase weekly mileage by no more than 10% per week. Take it a down week (reduce volume by 20–30%) every third or fourth week to allow tissue recovery and adaptation
Track both volume and intensity: two hard efforts per week is very different from five, even at identical total mileage
Account for life stress. A brutal work week, poor sleep, or illness all reduce your body's capacity to absorb training, even when the kilometres look the same on paper
Use resting heart rate or HRV data if available. Meaningful deviations from your baseline are early warning signs that recovery is lagging your load
Strength Training: The 50% Injury Reduction You're Leaving on the Table
I say this to almost every runner I work with: strength training is not supplementary. It's foundational. A systematic review in the British Journal of Sports Medicine found that strength training reduced overuse injury rates in runners by up to 50 percent. That number doesn't budge no matter how many times I say it to runners who skip the gym.
What to prioritize:
Glute and Hip Stability:
Single-Leg Squats
Hip thrusts
Lateral band walks
The glutes are the primary stabilizers of the hip and pelvis during gait. When they underperform, the load cascades down the entire kinetic chain.
Single-leg strength:
Step-ups
Bulgarian split squats
Single-leg deadlifts
Hip Hikes
Standing Fire Hydrants
Running is a single-leg sport. Train it that way.
Calf and Achilles Loading:
Heavy calf raises, particularly eccentric variations. This is the most evidence-based intervention for Achilles tendinopathy prevention and is chronically undertrained in runners.
Core / Anti-Rotation Stability
Dead Bugs
Pallof Press
Bird Dogs
Planks
Bear
Not crunches. The core's job in running is to resist rotation, not create it.
Twice per week is enough. The goal isn't to become a strength athlete, it's to build the tissue capacity and stability that makes your running more durable.
Cross-Training: The Secret Weapon of Durable Runners
I moved from track running into triathlon largely because cross-training kept me running when running alone couldn't. During periods of high shin pain, cycling and swimming allowed me to maintain cardiovascular fitness without continuing to load the structures that were breaking down. That experience directly shapes how I approach training for the runners I work with today.
Best cross-training options and what each offers:
Cycling
High cardiovascular demand with minimal impact loading. Excellent for active recovery days and for maintaining aerobic fitness during lower limb injuries. Strengthens the quads and hip flexors in a way that complements running.
Pool running (deep water running)
The closest simulation of running mechanics with zero ground impact. Research shows it can maintain running-specific fitness for up to six weeks during injury without meaningful fitness loss.
Swimming
Full-body cardiovascular training that builds upper body and core capacity running doesn't develop. Great for active recovery.
Strength training
The most important supplementary activity a runner can do. See above.
Periodization — Why Your Year Needs Structure
Periodization is the deliberate organization of training into phases with different goals that build on each other. Elite runners use it. Most recreational runners don't, which is why many plateau or cycle through the same injuries year after year. An example of a simple structure:
Base phase (8–12 weeks) — lower intensity, higher volume, building aerobic foundation and tissue capacity. Strength training is a priority here.
Build phase (6–8 weeks) — introducing quality sessions (tempo, threshold), increasing intensity while monitoring load closely.
Peak phase (3–4 weeks) — highest quality training, race-specific work. Volume begins to reduce.
Taper (2–3 weeks) — significant volume reduction while maintaining some intensity. Arrive at the start line fresh, not depleted.
Off-season/transition (4–6 weeks post-race), active recovery, cross-training, addressing any niggles before the next build begins. This phase is chronically skipped and largely responsible for why injury rates spike in January. A reminder that this is only a general guideline and that this may not be what works for you.
Up Next — Running for Life
The training structure is in place. In Part 5 of the final part of Everything Running we bring it all home with race day preparation, the long game of running longevity, and how to build a relationship with this sport that lasts decades, not just until your next injury. See you there.
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Not sure if your training structure is working for or against you? I work with runners to build individualized plans that account for load, recovery, and the whole athlete, not just the kilometres. Reach out to get started with Dr. Keirstyn today!
📍 Endurance Therapeutics | Oakville, Ontario
📞 905-288-7161