Here are some tips that help to keep maintain fitness level:-
1: Work out regularly.
2: Cardiovascular fitness routine.
3: Try new exercises to avoid routine.
4: Adapt to your environment.
5:Don't over eating.
6: Boost vitamin & mineral intake.
7: Create a healthy environment around you .
8: Stay close to people who are motivated.
9:Start getting normal sleep.
10: Remember that fitness is a step to a healthier lifestyle.