Video in Dutch (I will replace it soon in english) with a theory on why PH Mair typically shows blocks with an upturned hand in his sections on sickle fighting while in (medieval) dagger fighting such blocks are considered a sure way to break a thumb /and/ get killed.
The theory is that with a more conventional block, the opponent can easily twist his sickle around your wrist and cut deeply into your arm by pulling back (as is shown in pages 2 and 3 if I remember correctly). However, if your grab the arm from below with an upturned hand, he cannot do this.
This seems to be especially true for attacks from above where the conventional block would put the elbow far outside and make it an easy target. It might not apply to lower attacks.
Please don't pay attention to the exaggerated way I place my attacks in this video.
nice vid
mabBalduinThorek 1 year ago