ChatterBank11 mins ago
Training
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For more on marking an answer as the "Best Answer", please visit our FAQ.I don't know what you have read but i imagine it is a new theory from some american college kids. Weights are great and yes, I would recommend using them for toning, strength and building but I doubt if weight training will help the heart much.
What you need to do is cardio-vascular aka aerobic excercise. The British Heart Foundation suggests doing aerobic excercise at least THREE times a week for at least HALF an HOUR.
This will depend on current fitness levels and general health and any completely new regime will need to be checked out by your GP first.
Look up what your aerobic training heart rate is (depends on age, so i can't give you formula, though the net covers it in great depth). Try to keep to target heart rate.
Too slow, you might as well stay indoors whilst too fast you enter whats called anerobic. This is not good unless you are Lance Armstrong. Although your body will be working hard and burning off more calories you will actually be burning from muscle and oxygen supply only.
To your original point hard weight training (i.e heavy weight but low reps) will send your heart straight to anerobic which I question any benefit to your heart.
Soft weight training (i.e light weight but lots of ssets and reps) may, and I stress may, take you to aerobic zone but unless you want just to tone I would suggest a good walk, light run, a cycle, a leisurely swim or a steady step machine.
Hope this all makes sense. I have no formal qualifications but worked along the PT Corp in the forces for over twenty years.