Physiological Capacity: Run Fitness - Part 2.

 In Part 1 we looked briefly at how your body's systems need to be able to work together to allow you to to get out to run, get to the start-line of a race and the, if it's your goal, to get to the finish-line as easily and fast as possible.

The Key…Optimal Fitness…

Optimal means ‘enough to get the job done’. No more, no less.

It doesn’t mean maximal, nor flat-out.

 

At rest, optimal means maintaining basal or minimal levels to survive.

During training, optimal relates to elevated or raised levels of performance to complete and achieve the goal(s) of the session, or a series of sessions (in a day, week, cycle, block and/or phase).  

In a race, optimal equates to maximal maintainable speed, and minimal managed fatigue.

Your fitness - bottom-line - is how well you are prepared to complete a given task.

Whether for podium, performance, participation, prestige or pride: completing your first 5 minute jog, a 5km Park Run, a cross-country or trail race, or marathon all require similar capacities, yet each requires different fine-tuning – that is, different (run-relative) fitness.

Being a “good” runner is relative. For example, breaking the 30, 25 & 20 minute barriers is “good” for many, and is a measure of progress for others. Running 5km in 15 minutes isn’t close to good at higher (age-dependent) levels, and won’t qualify you for state, national or international championships.

Of course, if your initial fitness is low (and you can’t run 5km to begin with), improving it will likely help you with the physical and mental capacity to attempt or complete longer (run) distances.

In this sense, optimal fitness is relative – to individuals, to event, and to age.

Your body lets you build fitness – or prepare you to complete (run) tasks - in two ways:

 

(1) responses: sudden, temporary changes in function caused by exercise. These functional changes diminish after exercise. Responses relate to acute, single bouts of exercise – a run, a training session, or a race

(2) adaptations: more-or-less permanent changes in structure and function following training – repeated or chronic bouts of exercise. They allow your body to respond more easily during and after future sessions. Adaptations bring about structural and functional changes that have effects at rest, and during sub-maximal and maximal efforts. Adaptations make your initial loads or sessions easier, and build your maximal aerobic power and capacity – or ability to go faster and/or longer.

Ultimately, to improve performance you need to challenge your mind, body and skills – challenge it’s plasticity, or ability to change or adapt.

You run. You run regularly. You train. Your body’s physiological systems will alter their function (respond) in anticipation of, during and after each session. Over time, through repeated sessions their structure alters (thanks to nifty mechanical, chemical and genetic signaling systems) and, unless loaded inappropriately, function improves. Stop training and, at different rates, the improvements return towards their initial levels – you detrain.

Regular running optimises your body’s function in relation to (future) running, and maybe a few other tasks. Specific training optimises it for specific events and performance levels.

Depending upon your starting point, time-frames and goals optimizing your running (and training) can be see as optimising your energy and work.

These are the focus of part 3.