I believe the correct answer is 5 days a week are suggested in order to maintain your present fitness level.
1. Don't smoke.
2. Drink lots of water.
3. Try not to scream or yell.
4. Do a lot of vocal warm ups!
Explanation:
Isotonic contractions generate force by changing the length of the muscle and can be concentric contractions or eccentric contractions. A concentric contraction causes muscles to shorten, thereby generating force. Eccentric contractions cause muscles to elongate in response to a greater opposing force.
