It's not just the front that benefits. It's the back too! Here's what sticking to a workout regime and being discipline about it will do for you. From sexy fronts, to sexy backs.  Check out the gallery below:

1.

2.

3.

4.

5.

6.

7.

8.

9.

10.

11.

12.

13.

14.

15.

16.

17.

18.

19.

20.

21.

22.

23.

24.

25.