Fartlek
Fartlek is continuous endurance training with deliberate changes of pace or intensity; the intervals may be structured or guided by terrain and feel.
Movement and evidence
Fartlek is continuous endurance training with deliberate changes of pace or intensity; the intervals may be structured or guided by terrain and feel. Exercise setup and variation change joint demands and muscle contribution. The cited evidence supports specific tested conditions, not universal isolation or one mandatory technique.
ACSM resistance-training position stand 2026
Programming and limits
Use a controlled range and a load or pace suited to current ability. Progress according to training response. No exercise alone guarantees injury prevention, body-composition change or faster HYROX® performance.
ACSM resistance-training position stand 2026
FAQ
What defines this exercise?
Fartlek is continuous endurance training with deliberate changes of pace or intensity; the intervals may be structured or guided by terrain and feel.
Is there one required load or pace?
No. It should match technique, ability and training response.
Plan your fartlek sessions and track your running variety with Repz.
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