i try to do 4-6 reps each set for growth/strength but cant keep that up for 3 sets...resting 60 seconds in between. for e.g. i do 5 reps then maybe 3 then mabye 2. so i started reducing the weight between sets as needed to keep reps around 4-6. is this ok or am i cheating myself?
take a longer rest, then reduce the wieght if you still need to.
my exprience - joined gym 10 years ago, 6 1/2 years hard weight training exprience.
I agree, take a longer rest, maybe you're using to much weight to begin with...in my experience growth came with reps higher than 5. The longer the time your muscles are under tension the better.
Start with a slightly lighter weight then still do your six reps....then go for six on your second set..and so on
you're doing more of a strength training routine. I recommend 2-5 minutes worth of rest between sets. You'll get to be a big boy!
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You could also try to hit a range:
1st set 4-6 reps (heaviest weight)
2nd set (with reduced weight) 8-10
3rd set (with reduced weight) 8-10.
This way you work for strength and hypertrophy. 60 second rests is more inline with circuit training.