I am going to stick my neck out here and say around 10 minutes minimum to around 40 minutes maximum, with 20-30 minutes being optimum/average.
In my book this goes for all sorts of planned exercise, from cardio-vascular like running, or weights sessions or even my favoured variety of muscle control exercises.
Why do I say these figures? Well, from personal observation and a little research.
Around 10 minutes seems to be the norm for a minimum amount of exercise to bring on a “feel good factor”. It certainly is for me and the research indicates that this is so for most.
I advocate concentration on the exercise that you are doing and I think that it is difficult to maintain that concentration for more than 30-40 minutes. And when you lose concentration, then the boredom factor kicks in. Exercising when you are bored is counter-productive in that it will make it harder for you to keep up with your programme.
There is another factor when exercising more strenuously, like when running for example. That is that the body starts to produce Endorphins when it thinks it may start to experience damage. Endorphins are natural pain killers. I won’t go into all the technical stuff here. You can find all that on sites like Wikipedia.
But, for your normal day to day exercise programme, I advocate listening to your body, and if your body is listening to itself and starting to produce pain killers in response to damage done or imminent damage, then you have done enough!
That is not to say that someone who insistent on doing a Marathon, for example, should immediately abandon the idea, far from it. You should do what you have set your heart on. I am just talking about Easy Fitness, for those who just want that!
Before I go, there is one more thing about Endorphins. They can bring on a feeling of euphoria (the “Runners High”). Sounds great doesn’t it? Well yeah, but not if it is masking damage to your body! Also it can become addictive. Your body increasingly accommodates the Endorphins so that you need to exercise longer and harder in order to feed that addiction, thus increasing the chances of more serious damage to your body.
On the whole I prefer the Easy Fitness route.
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