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Exercises and 'sets' -> how long do you wait between each set?
Ive always been a little confused on this
For example when dumbbell exercises, youre supposed to do 3 sets of 10-12 reps. But how long do you wait between each set? I just do one set on an arm, then change arms for the next set. Am I supposed to just wait a few seconds, then go again on the same arm?
Also, are 'sets' preferred compared to just doing reps until exhaustion? For example, I often can still complete my very last rep on my last set without feeling that my arm is about to break off if i use the set method, but doing 25-30 reps in a row takes my arm to exhaustion. Which is better?
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