Changing Levels of Performance

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Complete the crossword, then click on "Check" to check your answer. If you are stuck, you can click on "Hint" to get a free letter.

1   2                     
                    
      3                
 4                     
                    
                    
     5                 
                    
           6           
        7    8            
   9                   
             10         
    11                  
                    
       12               
                    
                    
                    
                    
                    

Across:

1. A measure of the number of breaths taken per minute. (9,4)
4. State that develops during anaerobic respiration and is repaid during a rest period. (6,4)
5. Course of vigorous exercise undertaken on a regular basis to improve fitness. (8)
8. Chemical formed as a result of the incomplete breakdown of glucose. (6,4)
9. Tissues attached to bones that produce movement. (7)
11. Unit used to measure force. (6)
12. Physical condition of the human body as indicated by the length of the recovery time. (7)

Down:

2. Time taken for pulse and breathing rates to return to normal after exercise. (8,4)
3. Type of respiration that occurs in the absence of oxygen. (9)
6. State of muscle resulting from lack of oxygen and the build up of lactic acid. (7)
7. Type of respiration that occurs in the presence of oxygen. (7)
10. A measure of the number of times the heart beats per minute. (5,4)