About
All Feedback (25)
- volfan37415 (34725)- Feedback left by buyer.More than a year agoVerified purchaseGreat Ebayer A++++++++
Reviews (1)

10 Jul, 2019
Helps you train harder
It does improve aerobic performance, but it does not substitute training. You still have to continue training hard. The advantage is that you can train harder with it. Do not think it will do that for you.