The next thing to look at, what are the goals of the client? Many clients like personal trainers simply to help them work out, no specific goals but general overall fitness. For these clients, percentages are probably unnecessary as you as the trainer can monitor their intensity and effort by watching. If it is an athlete preparing for their sports, intensities will give you a great guideline to go by and allow you to accurately pick a weight for their work sets that will increase their potential for strength.
If you are relatively new to using Excel, you will notice that learning to use all Excel formulas is no easy task. There are many different functions that can be accomplished by the use of these formulas such as mathematical calculations. This is not something you can accomplish by listing your data on a Word document. The simplest of all Excel formulas are those used to perform basic mathematical calculations such as addition, subtraction, division and multiplication. If you have never worked inside of an Excel spreadsheet, you are going to need to find a course that can teach you how to get started. These functions are among the most basic and are quickly learned by even the most inexperienced users.