04/15/2026
Training more but going nowhere? The problem probably isn't your engine (💬 James Cousler, PT, DPT)
The most common pattern in marathoners, triathletes, and hybrid athletes looks like this: aerobic fitness improves, workouts feel strong, but the Achilles tightens, the knee starts barking, and the lower back stiffens after long sessions.
High aerobic capacity does not equal durability. Fitness does not equal structural resilience.
Here's what the research actually shows:
🏋️ Heavy strength training improves running economy by 4-8% without hurting VO2max
📐 Structured strength programs reduce overuse injuries by up to 50%
🍖 Tendon stiffness (a direct product of load training) makes every stride metabolically cheaper
The athletes who break through plateaus and stay healthy aren't just fitter. They're structurally built for the demands they place on their body.
If you're chasing a marathon PR, a sub-90 HYROX, or just want to stop managing the same recurring niggles, read Dr. James latest article using the link in our bio
📸 James Cousler, PT, DPT
📍 MovementX in Reston, VA