Our expert says:
Yes, in principle, heavier weights and then fewer reps is probably the way to go. It's not so black and white though - you might, for example be able to do 15 reps at a given weight, I'd say you should probably lift the weight and aim to do 10 reps. You could even keep going, and do 6 reps of a much heavier weight, but I wouldn't go into that right away. Rather find the compromise, so that you're not too light, but also not too heavy that you are forcing it.
There's no answer to "what should the weight be", because that depends on you. I'd say you should find a weight that you could lift maybe 15 times before failure, and then do 3 sets of 10 reps on that weight, with a short rest between. But play it by ear as well, don't get bound into anything. If you can finish the last rep of the last set (in this case, the 30th lift in total), feeling like you're close to 'failure', then it's about right. If you can't finish it, it's probably too heavy, and if it's easy, it's too light.
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