I have small hands so maybe this also plays a factor too?
Do you hold down the dotted semibreve note for the whole duration during the octave skips?does anyone do that for that matter?
Yes, but sadly enough - I've seen tiny, wee russian women playing pieces with octaves like nothing can hold them back. Interesting question. What span do you have? Can you reach a 9th, 10th?Can you play an octave with fingers, 1-4 & 1-3?
Pain and soreness is definitely not good. The octaves are probably above your skill level and/or your playing them with the wrong movements.First of all, octaves are played with active finger movement, not just "hit".With correctly played octaves, the finger pads very near the tips are "gripping" the keys and pulling them down, with the assisting movements of hand and arm. It is a balance between the three elements, and if the fingers aren't stroking the key the octaves will fail.I suggest you start with a smaller interval that's comfortable for your hands. A fifth for instance. First, stroke the key 5 times with just the thumb. Then stroke the key with the fifth finger 5 times.Then, as you try and keep this feeling, play the fifth -- thumb and fifth finger -- at the same time trying to feel a balance and coordination of the fingers, hand and arm, stroking the keys as you pull down. This should be easy and pain free. And between strokes you have micro moments of partial relaxation since after you stroke the key, the work is finished except for getting ready to play the next repetition.After you feel like you're playing the interval -- the fifth -- with fingers and hand/arm, then widen the interval to a sixth trying to keep the same feeling I described.Then a seventh and finally an octave. Every interval/octave should feel like you are stroking the key as I described, not hitting it!I think if you'll follow what I suggest, you'll discover a completely different way to play octaves that offers much more control, ease and precision.