[fcallagy]

Cheers for the replies,
I normally train dnf at a low level as am usually on my own but do find that I can feel starin when i push off hard. I also do a big armstroke at the end of the glide so am not sure which contributes more to O2 loss. I guess that the arms might use less O2 than the legs if NF but with fins the legs are more efficient ie get you further for the same effort