Categories: Blog, Fitness Articles, Fitness Tips. You’ve just started strength training, and you’re eager to see those first ripples of muscle. One of the reasons people stop training is because they get discouraged when they don’t see results quickly enough. How long does it really take to see the fruits of your strength training labors? Strength Gains Happen More Quickly Than Gains in Muscle Mass. It can take six weeks or more to see changes in muscle size. On the other hand, strength gains happen more quickly. Despite the fact that your muscles don’t increase in size during the first few weeks of strength training, they become do become stronger.