Abra
Hi abra and welcome! 220-age is o.k. for calculating your heart rate, but doesn't take into account your fitness level, body type etc. Here's a better way...
First I susgest you take your resting pulse first thing in the morning for three mornings before you get out of bed to find the average. You may then want to use the Karvonen formula - similar to the BUPA caculation.
For females it is actually 226 - age and not 220! An example is as follows:-
Formula is 226-(age) 33 = 193
191 - (resting pulse) 605 = 133
133 x 60%= 79.8
79.8+ 60 (RP) = 139.8
So for 70% = 153.1
For 80% = 166.4
Use the 220-age is would be approx. 150!
Dr. Northerner - The American College of Sports Medicine, the body that most countries recognise as the authority on fitness, recommends at least 20 minutes of cardiovascular (aerobic) exercise three times per week and resistance exercise and flexibility training (or stretching) a minimum of twice a week.
However, to loose weight and see further improvements a longer duration or more intense workout will see results. Your body needs to have rest days, so please schedule them in! It does sound as though you just need to factor in some strength training instead of one of your workouts(which will also increase the size of your muscle fibres and give more power with your running etc.)
Sorry 3andnomore - don't entirely agree with Jason Vales (actually never heard of him and will investigate further!) Realistically, how many people can factor in that much exercise on top of working, housework, chasing after children and their various activites... These are workouts in themselves and keep us all active!!!
I became an instructor by doing a YMCA/RSA course initially and then building my qualifications and experience over the years!
Thanks for all your comments on the "idea". Will have to make some enquiries with various companies without them poaching my idea!!
Laloop - hope you are not overdoing it and it's just a slight strain. Why not try and do a lower back stretch such as lying on your back, arms out to the side and knees in towards your chest. On your exhale turn your head towards the left and knees to your right. You may want to rest your right had on the outside of your left thigh. Repeat the other side. There are other stretches and if you want I'll try and find some diagrams online????