When selecting a 3 or 4 day strength training split consider how many days can be allocated to this style of training. For example, if your primary training focus is strength training, ensure you're able to participate in strength training four days that week before selecting from the 4 day split. If you are uncertain you can commit to four days of strength training, consider selecting from a 3 day split. Or, select from the upper body and lower body categories that can be completed in two days. If strength training is your secondary focus, you may opt for a full body strength workout where all major muscle groups are worked on a single day. More advanced users may include extra isolation training when a particular muscle group needs attention.