In a nutshell, muscular strength is your ability to lift a maximum weight with minimal repetitions. Muscular endurance is your ability to lift a lighter weight and move it for a longer period of time without getting exhausted. With this in mind, it is fair to say that muscular endurance is a very important part of most training programs. Endurance training is also a safer way to load the body as it is gradual and avoids overloading the joints. If you are someone in a sport that requires you to be explosive and powerful, then strength training is an absolute must. If you are in a sport that requires you to move continuously for a long period of time, such as walking, running, cycling, or swimming, then you should be focusing on a program that largely consists of endurance training if you are looking for maximum training benefits and performance outcomes. Spend the time to find exercises that you can perform well for at least 20 repetitions. This might be something like a squat press with a light load instead of doing a squat press with a maximal load and few repetitions. Endurance training takes a longer period of time to increase the load on the body but if you train consistently and with good quality, you will find you can increase the weight and the intensity without losing your form. This is when true performance outcomes will be achieved.
Try some of the level 1 endurance exercises from the video library and feel the difference it brings to your body. Three daily exercises can make a huge difference!