The initial training period is when you gain confidence in them and they in you. (nextscientist.com)
The cost of the app is expected to be around $ 95, covering an initial training period of about three months during which users will train for 15 minutes, three times a week. (newscientist.com)
When a muscle is trained, de-trained and retrained, there is a faster change in muscle size during retraining compared to the initial training period from an untrained state [3]. (fitnessandpower.com)