Three Reason Why:
- By creating an exercise plan ahead of time you are ready to go when you get to the gym (unlike those people you see who get there and stand around dumbfounded trying to figure out what to do)
- By documenting and tracking exercise characteristics (type of exercise, weight used, reps, etc. you) you always know where you left off the last time you workout out and what your trying to improve.
- Nothing Motivates Like Results! and results are much easier to see in numbers than in the mirror (but that will follow).
- Pen and Paper - Sometimes simple is better.
- Online/App Tracking - I use Gym Technick but there are hundreds of others in the app store.