Sentence 1: Rita was out of shape. 
 Sentence 3: She practiced every day 
 Sentence 4:  She strained her tendons and joints from too much exercise 
 Sentence 5:  Rita got in worse shape sitting around waiting for her joints heal 
 Option 1: So she took a karate class. 
 Option 2: She decided to start going for walks in her local park.