If you round it up you will get 20.
Answer
As far as i know contact lenses pose no threat to your eyes unless you keep them poorly cleaned.
Explanation:
1. Medium-range training involves periods of 10 to 30 minutes of high-intensity exercise at
90 to 100 percent TI. This training is a type of “racing” workout. LSD training is an activity
that’s performed at a low intensity and can be sustained indefinitely. It teaches the body
to burn fat and creates endurance. LSD training should exceed 30 minutes.
2. The starter phase allows the body to get used to the idea of exercise and to avoid soreness
and injury, and it allows individuals time to experiment until they find the program
that works best for them.
