How much is too much? How hard is too hard?
I see it all the time, training for the sake of training. More is not better! It's all about quality not quantity. We train endurance athletes with as little as 5 hours a week all the way up to 10+ hours a week.
Don't focus on how many miles you run or how far you rode your bike, focus on your heart rate target zones. The key to successful endurance training is finding the balance between the "junk" and the training miles we put on our legs/bikes.
You can complete a 30 hour adventure race with as little as 6-7 hours a week of quality training. Not only complete the race but also compete in the race! I will tell you how to figure out what your target heart rate zones for quality training.
First, you will need to know your resting heart rate. Over the next 3 days record your heart rate first thing in the morning, before you get out of bed. Take an average of those three days. Letâ??s say day one is 48, day two is 50, and day three is 47. Your resting heart rate would be 48.
Next, we will determine your age-adjusted maximum heart rate. Take your age and subtract it from 220. So for a 32 year old the maximum heart rate would be, 188 (220-32=188). Then we need to figure out your heart rate reserve. Take the 188 (maximum heart rate) and subtract your resting heart rate. (188-48=140). 140 is your heart rate reserve. Now we are ready to put your training zones together.
Example: ZONE 1
Multiply your heart rate reserve by 40%. (140 x 40%= 56)
Add resting heart rate back in. (56+48=104)
This is the low end of heart rate zone 1.
Multiply your heart rate reserve by 45%. (140 x 45%= 63)
Add resting heart rate back in. (63+48=111)
This is the high end of heart rate zone 1. So heart rate Zone 1 = 104-111.
Use the following percentages to determine all 6 heart rate zones. Zone 2 = 50-55%, Zone 3 = 60=65%, Zone 4 = 70-75%, Zone 5 = 80-85%, Zone 6 = 90-95%.
As an endurance athlete you should spend most of your time training in heart rate zones 3-4. You must push your body into heart rate zones 5-6 for several short intervals or fartleks throughout the week. This will help you to recover quicker during the race when you need to push hard for an uphill section. Do all your recovery days in heart rate zone 1-2.
The method used above is a best guess method and will provide you with a staring point. If you want to really dial in your training zones you need to seek professional help. Your target heart rate training zones are the keys to a success racing and training season.
- consult your doctor or trainer before beginning any exercise regiment
Keith Bushaw
Director of Coaching
ARcoach
Certified Fitness Trainer
Certified Endurance Trainer
USA Cycling Certified Coach
Certified Fitness Therapy


