Final answer:
To determine when to increase resistance in strength training, consider factors like being able to easily perform extra reps, challenging muscles through overload, and gradually increasing intensity over time for optimal results.
Explanation:
When to increase resistance:
- If you can easily perform two extra repetitions on your last set with good form, resistance can be increased.
- Increasing resistance challenges muscles by overloading them, leading to muscle adaptation.
- Frequency and intensity of resistance training should be gradually increased over time for effective results.
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