I get a dull ache after long rides on the outside part of my palm. I think it is because on longer rides i’ll ride more with my arms locked out rather than bent at the elbow to save fatigue in my triceps and lower back. On short rides i’ll ride a bit lower with my arms bent and a bit more lent over. I guess with my arms locked out i’ve got more weight on the palms and i’m lacking the ‘suspension’ of my elbow and lower back and road vibration and bumps are transmitted straight up through my palm. I try to change my hand position frequently now, going down into the drops, palms flat over the top of the hoods rather than on the hoods in the traditional position, and even time with the hands on the flat part of the bars. I’ll find out if this is effective after my next long ride.