Yes, we all hate it, but you do need to develop strength. Most of us don't want to look like bodybuilders, but you need to have the core strength. It helps you as you age. You will need this strength over time.
Working out isn't just for loosing weight and looking great. The importance of working out is to stay healthy. So you have to develop healthy eating, and sleeping habits if you want to stay healthy. That includes drinking plenty of water.
As you age your workout is just as important as it was when you were young. It just needs to change a little. Strength training is still important, it just needs to be a little lower impact.
Before and after you exercise it is so important that you stretch. Before you exercise so that you don't pull any muscles. Afterwards it is important so that your muscles remain flexible.
A workout routine may work for you for several months, and then you find it doesn't work anymore. Don't be afraid of change. In order to stay healthy we need to keep exercising in life. And there is more than one way to get exercise. Try different ones. There are times when an hour at the gym just isn't possible. But a half hour of yoga at home is. Mix things up and you will find that you will continue to enjoy your routines.