I have that trouble too. It may be wishful thinking, but I have a hunch that a straight dead hang without having to tense the leg muscles, in order to keep one's feet off the floor, might be easier.
Today's dead hang was 1 mins and 37 secs, without gloves. I'm not getting better and i wonder if there is any real scope either for my grip to improve, or me to 'man-up' and resist more effectively the intense burning in my fingers
That's a massive number of chin-ups and I can only dream of reaching those numbers. I've still got elbow ache from the last session. Golfer's elbow? Probably to do with wrist form.