Simple rule to follow when designing set/rep schemes. Total reps for any exercise must be approx. 24 or more, (30-40 is best for growth. A little less is ok for strength.), of 75% - 90% 1RM. So by doing 3x3, you are only doing 9 reps. For strength training, sets/reps should look like this 5/5, 6/4, 8/3 progressively every 2 weeks.
One other thing about strength training that is rarely mentioned, is that to perform the concentric contraction explosively. This means to put maximum effort into the lift, not just enough effort to lift it. This triggers a greater neural adaptation, which is responsible for approx. 50% of your strength gains.
One other thing about strength training that is rarely mentioned, is that to perform the concentric contraction explosively. This means to put maximum effort into the lift, not just enough effort to lift it. This triggers a greater neural adaptation, which is responsible for approx. 50% of your strength gains.