In answer to your questions: (i) mainly bum, sides of body and wrap around trunk muscles, inner thigh, outside of shoulders, and arms and (ii) pretty flexible(can touch my toes straight leg, can sit with soles of feet together and both knees on floor) but not entirely (can't do the splits or lotus).
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In answer to your questions: (i) mainly bum, sides of body and wrap around trunk muscles, inner thigh, outside of shoulders, and arms and (ii) pretty flexible(can touch my toes straight leg, can sit with soles of feet together and both knees on floor) but not entirely (can't do the splits or lotus).
Those resources do look very useful, thank you.