How exactly am I supposed to do this? Does this require muscular strength or something? (Which I lack)
Apparently, it requires "tensing up" your arms and shoulders, but doing so for a fairly long period of time allows me to go at 110-130 bpm jackhammers for a few seconds only.
Apparently, it requires "tensing up" your arms and shoulders, but doing so for a fairly long period of time allows me to go at 110-130 bpm jackhammers for a few seconds only.

























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