RainbowFlo
Sprinting down the street
About BirdTricks, I watch some of their videos because they do have some useful information especially for beginners but I take everything with a pinch of salt. Sometimes is does feel like watching one long advert though and I wouldn't buy their products ( the price is ). Otherwise, as long as you do your own research to check what they say is correct, I don't see a problem . There are definitely better trainers out there. I really hate the lowering weight stuff though...