A 1-10 self-reported scale of how hard a session feels. RPE 5-6 corresponds to Zone 2 (conversational pace); RPE 7-8 is Zone 3-4 (uncomfortable, harder to talk).
Training
RPE (Rate of Perceived Exertion)
Also called rate of perceived exertion, perceived exertion
More from training
Related terms in this category
The 10% Rule
Never increase ruck weight OR weekly distance by more than 10% week-over-week. Increasing both at once dramatically elevates injury risk.
Zone 2
A training intensity where you can hold a conversation but not sing. Roughly 60-70% of max heart rate. Optimal for cardiovascular adaptation, fat oxidation, and HRV improvement without systemic recovery cost.
Progressive Overload
The principle that adaptation requires gradually increasing demand over time. In rucking, this means adding weight, distance, pace, or terrain difficulty in small increments — typically constrained by the 10% rule.
Active Recovery
Light movement on rest days to promote blood flow and tissue repair without adding stress. For ruckers: a 20-30 minute unweighted walk on the day after a hard ruck.
Volume (Training)
The total amount of work in a training period — typically expressed as miles per week or load-miles (weight × distance). Volume drives endurance adaptation; intensity drives strength adaptation.
Couch to Ruck
Beginner programs that take a sedentary person to consistent rucking over 4-12 weeks. Modeled on running's 'Couch to 5K' format.
See all terms
Browse the full rucking glossary.