Final answer:
The recommended rest time between sets for isotonic exercises aimed at muscle hypertrophy is typically 30 to 90 seconds, but may extend up to 2-3 minutes depending on workout intensity and individual fitness levels.
Step-by-step explanation:
For those performing isotonic exercises with the goal of achieving muscle hypertrophy, the recommended rest time between sets typically ranges from 30 seconds to 90 seconds. This duration allows for partial recovery but still maintains a level of muscle fatigue, which is conducive to muscle growth. The exact rest period can vary depending on the individual's fitness level, the intensity of the workout, and the specific muscles being targeted. Furthermore, some research suggests that rest periods could even extend to 2-3 minutes for heavy lifting when focusing on maximizing strength along with hypertrophy.