Compare the changes in the respiratory system of Dancer A to Dancer B

Two dancers are preparing for a performance. Dancer A is sitting on the floor performing static stretching. Dancer B is performing a dress rehearsal of their physically demanding dance routine.

Describe how the changes in blood flow for Dancer B will be different to those for Dancer A.

Describe two short term effects which the pre-season training programme could have on the players' hearts.

Explain the short-term effects on the heart and the blood of a swimmer performing a 100m front crawl.