Congratulations on your weight loss. It is great to
hear you achieved a significant goal or are on the way to achieve it and in
process created new goals for yourself. That is exactly how it is supposed
to be done.
Since this is your 1st time walking the half marathon you
should really focus on endurance.
Up to about a week before you try to walk the half marathon
for the first time you should try to make your longer distance walk as close to
a half marathon as your are comfortable doing.
If you are comfortable at your current pace you should keep
it during your practice / training walks.
Your heart rate equals your intensity of your
cardio/aerobic workout. Since your goal is to walk 13 miles, intensity
(heart rate) is not as important as how long you can maintain your 98 beats per
Focus on building your endurance so you know you will
finish walking the half marathon, then focus on getting a cardio workout.
If you want to increase your heart rate over 100 beats per minute a simple way
would be to change your walking course.
Find an area to walk at where there are hills. If you
walk on a treadmill, raise the incline level and try to keep your desired pace.
At the same pace with an incline, the intensity (your heart rate) of the
exercise should be greater.
Cross training is simply performing other activities which
give you benefits which walking does not provide. Weight training,
bicycling, using the elliptical machine at the gym, climbing stairs, etc. will
help your body as a whole.
Cross training will help your body become more efficient at
utilizing and burning calories and could also improve your cardio endurance.
If you are looking for a different cardio workout to
supplement your walking check out the Cardio