Fitness Lit Breakdown with Dr. Nick Trubee
Health & Fitness
First, let's set the expectation. If you reduce the rest interval between sets of a given workout, your capacity noticably decreases over the course of your working sets. What does get taxed, however, is your aerobic energy system. When rest intervals are lengthened, your ability to produce the desired reps over the course of many working sets is spared which results in a higher training volume. Moral of the story, shorter rest intervals improve your aerobic energy system, longer rest intervals improve overall strength and muscle size.
But! Is there a difference in ideal rest intervals for single-joint versus multi-joint exercises? Do you require less rest for single-joint exercises and more rest for multi-joint exercises (or vise-versa) when the desired outcome is less fatigue by the end of the last 2 working sets? Remember, a greater capacity through the entire string of working sets = more volume, which in turn results in greater improvements in muscle size and strength.
By the end of this 30-minute episode, you'll walk away with specific rest intervals for single-joint and multi-joint lower body exercises that give you the best opportunity for improvement without wasting a single minute of your workout time.
Article used for this week's breakdown:
Rosa, A. et. al. Repetition performance, rating of perceived discomfort, and blood lactate response to different rest interval lengths in single-joint and multijoint lower-body exercise. Journal of Strength & Condition Research. 37(7)/1350-1357.
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