TSI USA Inc

Erin Stern

By Erin Stern, IFBB Figure Pro/USATF Competitor

Erin Stern

"One thing that I really like about PEAK ATP as a pre-workout - I can take it before HIIT and not have to worry about it elevating my heart rate like caffeine would. I feel that I have increased power output and don't feel jittery or lightheaded."

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