Looking back in a previous post about forehand preparation regarding wrist bend, there is also an elbow bend. Preparing for the forehand stroke, the elbow is bent near the waist like storing power and released during the forehand stroke.
I have learned that professional tennis players practice 6 days a week and a minimum of 4 hours per day. That's a lot of time and dedication. For not so very young people how often do we need to practice? For me everyday practice is good but around 30 minutes to 1 hour practice per day. For not so very young people, too much body stress is not recommended. For not so very young people like us, the main objective is to maintain active body and good health but not to be professionally competitive in the sport. Yes we can have amateur tournaments but that is primarily to promote good health for not so very young people. If there are no players to play with, a vacant space with a wall is a good location for daily practice.