Part 3 :
Progressive resistance overload.
Suppose I lift a pen up, and I use it to ‘develop’ my biceps.
Muscle activity happens, but does the muscle grow ?
Think of any given muscle like the cylinders of an engine.
Some engines use the additional cylinders, when more power is needed .
The entire muscle does NOT fire up when a ‘small’ weight is lifted.We have muscle units.
And these units work [relatively] independently of each other, within a given muscle [in this case our biceps when lifting the pen ]
{A muscle cramp is nothing more than a misfire of the individual units in a given muscle.}
So if I lift something significantly heavier than a pen, more units get recruited
But mere recruitment does NOT cause the muscle to grow, as recruitment happens only when heavier weights are lifted .
What happens when all the units are used up ? Then the body as no other option but to develop more muscle.
So then how does muscle grow?
It occurs by two ways
A) the individual fibres, become ‘thicker’
B) new muscle fibres are formed.
So if I keep lifting my pen to develop my biceps, the body does NOT have the incentive to recruit new muscle units , as well as to form new fibres., as the weight is suboptimal and well below the threshold weight needed for muscle growth
The reason being, recruitment and new muscle formation is an energy intensive process, and as I had mentioned in my earlier post , our body always maintains a baseline state of ‘rest’, where everything is in balance.
This state of balance is important…and this will explain why cardio, or household work and to a limited extent calisthenics [pushups, burpees , jumping jacks] aren’t effective in muscle building.
Will come to this point later.
So to summarise there is a threshold weight wherein , if that weight is crossed, muscle recruitment of other units happen, and again another threshold, wherein once all the units are used, up, the muscle will start growing.
But on the other hand ,merely lifting weights isn’t enough.
The time under tension is important …meaning the time , the muscle is loaded with the weight is also important..
eg. If I do a single squat of 80 kg..it isn’t enough to stimulate muscle growth .
so again to summarise, we need a threshold weight and a threshold time under tension for muscle development to happen.
Now this is the reason for ‘progressive’ resistance training, wherein we keep elevating the threshold weight or threshold time or both.
This will stimulate muscle growth as well as muscle thickening [hypertrophy ]
So how do we elevate threshold weight ? Increase the weight we use , week to week basis.
How do we elevate time under tension ? Increase the rep range , number of sets or both
This will ‘elevate’ the resting state or the ‘balance state’ of the body, as the body is now more efficient in its energy utilisation, , as evidenced by an elevated basal metabolic rate [BMR aka RPM ]
Now coming back to jogging / walking / cycling .
To generate new muscles in these activities, you will either have to increase the duration of these activities or increase its intensity
e.g. jogging 2km instead of 1km , jogging on an incline slope instead of a flat surface.
Once the body has acclimatised itself to a 2km jog, it has no incentive to develop more muscle or adapt any further.
So the solution is to go for a 3km jog..and so on and so forth.
The issue with this approach is time.we are limited by the time we can spend on these activities.
What about pushups, situps and other calisthenics ?
Same … the only option is to increase the rep number or the intensity .but again we are limited by time.
Doing 100 pushups is taxing..but for new muscle to grow, we’ll have to up it to 125., then 150 ..
I think you can see where I am going with this.
“But doc, my cardiologist told me I have to walk vigoursly for 1 hour, swing both my hands , to control my sugar”
Thats because some exercise is better than no exercise.
Mobility is better than immobility.
please note: I am not saying that jogging , cycling is bad…I’m saying that increasing muscle mass,can be used as a tactic to lower your sugar, and by consequence your medications also
By coincidence, this came in my mailbox [ google are you monitoring me ?]
Here
Do let me know, if you need any further clarifications