4 Signs You Need to Increase Your ResistanceStrength training is about building and maintaining a certain level of strength. You might not be lifting enough weight during one or many of your exercises if:1. The current weight you are lifting isnt a challenge. Strength training is meant to be challenging, because the whole point is to overload your muscles so they get stronger. If the weight you are lifting isnt as challenging as it used to be (or isnt challenging at all!), then it is time to increase the resistance.2. You could go forever. Each strength training exercise you do should cause you to feel muscle fatigue within 15 repetitions (or fewer). Muscle fatigue feels like you couldnt possibly do another repetition in good form. If you can do more than 15 reps in good form, or if you literally feel like you could go on forever because the resistance youre using is so easy, then its time to take it up a notch.3. You have never increased the weight you lift. When you first started strength training, then the weight you lifted was a starting weight. Continuing to progress in strength training is essential to getting the most out of your workoutsthat means lifting more weight as you get stronger over time.4. The progress has come to a stop. Without making your muscles work harder than theyre accustomed to, they wont get stronger. As you train, your muscles will grow stronger in order to meet the demands you are placing on them. So if you keep offering them the same workload, they will keep working the same amount, and progression comes to a grinding halt.http://teens.sparkpeople.com/resource/fitness_articles.asp?id=1050