>>23603055
Humans are somewhere in between, but actually closer to elbows out because your two forearm bones are at a slight twist when relaxed and human arms aren't straight, they're slightly bowed at the elbow.
Stand relaxed. Now put your elbows facing away from your body. Twist your fist so the back of your hand is also facing out. Feels bad right? Now do the same but have your elbow back. Doesn’t make you feel like a tard right? That is your answer.
>>23603689
Which is more practical then? When do you need to rapidly throw your lower arm into your thigh? Now, how often do you need to get your hands rapidly in front of you in a curling motion?