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@EamonnFlanagan: Isometric training (IST) for e...

@EamonnFlanagan
19 views Feb 05, 2026
1
Isometric training (IST) for endurance runners has grown in popularity recently but remains relatively under-studied.

This article presents a strong theoretical rationale.

Potential benefits most likely via improved economy rather than via VO₂max or lactate threshold.
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The proposed mechanism is biomechanical:

increased tendon and joint stiffness
⬇️
shorter ground contact times
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better elastic energy return
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improved running economy.

Evidence isn't definitive, but studies w/ positive outcomes involve high-intensity, high-effort actions
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Practical recommendations:

✅ ~3-second maximal contractions
✅ 10–20 reps per session
✅ ≥90% MVC
✅ Target ankle plantar flexors & knee extensors.

Use as a complement to dynamic strength and plyometric training. A low-fatigue tool with likely upside
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More on isometric testing and training here in thread below

If you're interested in this topic and strength diagnostics more generally, get in touch. I’m planning a small in-person, practical session on this later in the spring


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