Paranoid..
I've used TAP successfully in the past and I've stayed with BB's and workout alone. Don't be afraid to ask someone in the gym for a spot, they may need one in return some day, and it'll really help your development.
I always ask them and let them know 1. how many reps I'm shooting for and 2. that if I get stuck for them to slowly lift the bar so I'm still doing the majority of the work to get the bar back to the pins.
Now, if you're working out at home alone, then as long as you challenge yourself on the DB's, you'll be good switching them out.
However, in Phase 3, I would absolutely recommend that you stick to the BB for the heavy work.
If you have any questions on the program, feel free to PM me.
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You have to test yourself everyday. If you don't, then it's a wasted day.
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