I did a beginner one, 10 minutes, designed for mums (by a mum).
Is it normal to feel like I'm dying?! 
Obviously not quite, but I feel a lot more exhausted than I thought I could in just 10 minutes!
Also, do i need to do another one today? Or go on my exercise bike? Or is just 10 minutes a day enough? I am 41 & rather overweight, so weight loss & fitness are my main goals. Have no money & little time so these seemed like a good option.