Larry started a fitness program about 8 weeks ago. he runs 2 miles every day and does some weight training. he likes to use weight machines and focuses on 1 or 2 muscle groups each day. he could initially do 6 repetitions of most exercises in his program, and he can now do 15-20. larry likes the initial improvement in his energy level and appearance since starting the program. he has noticed that his work in construction seems a little easier, too. however, larry doesn't think he is getting as much benefit out of his program now as he did at the start of his fitness program. larry isn't seeing as much improvement as he did initially because

His body is not as responsive to the level of exercise  as it was initially

Explanation:

The first change you can be aware of when doing exercise by the first time is that you are gonna start breathing faster, it is going to be even so difficult to breathe properly and you will also feel your pulse is high.

The first few weeks are so tough, but if you go along your body starts adapting to your workout and later you will feel that even doing the same routine you have no longer difficulty to do it. This happens because your body is already used to, then it's necessary to increase the level of difficulty in your daily workout. For doing this there are different ways, such as increasing the number of series, repetitions, increasing the weight and so on.