Match the phrase with the term.
1. Putting the palms of your hands together and pushing hard for 1 minute is an .
2. Using dumbbells to strengthen the arm muscles is an .
3. Performing push-ups is an .
4. Flexing your stomach muscles for 30 seconds is an .
5. Performing 30 sit-ups is an .

Choices for each one:
A. Isometric exercises
B. Isotonic exercises