Muscle can be trained across a broad range of loads when sets are challenging and total work is recoverable. Pump training is one way to organise that work.
Moderate loads and repeated sets can provide a hypertrophy stimulus. The visible pump is an acute response, not a measurement of future growth.
Progress still depends on consistent training, sufficient effort, nutrition, recovery, and a programme that evolves over time.
No. Hydration, carbohydrates, temperature, and exercise choice affect the sensation. Judge the programme by repeatable work and longer-term change.
Pump Ledger is a training logbook, not medical advice. Scale training to your experience and circumstances, and seek qualified guidance when health or injury concerns affect exercise.