Concentrated Volume: The Secret To Getting Faster Without Adding Training Hours

Written by:

Jason Koop

CTS Premier Ultrarunning Coach

Updated On

September 3, 2025

Jason Koop is Head Coach of CTS Ultrarunning and author of “Training Essentials for Ultrarunning“

Many runners injure themselves because they seek to increase performance by simply training more. Up to a certain point, a reasonable increase in overall workload (i.e., time on feet, elevation gain, strides, strength training or really anything) usually results in some level of improvement. But there are limits. You can’t simply add more of everything, and people who try end up injured, exhausted, and burned out. A wiser way to “do more” is by rearranging what you’re already doing so your efforts can be more effective within your existing training volume.

More hours or miles is not always the answer. For most athletes I work with I look first to rearrange training so that it’s more effective. Adding hours comes second. Adding workload through by increasing hours is easy but inefficient and increases an athlete’s risks for maladaptation and injury. Rearranging the workload can be more complicated, but I find it carries lower risk in the short term. In the long term, it creates a reserve of available time an athlete can leverage when higher volume is necessary. If you max out volume prematurely and wastefully, an athlete has nowhere to go.

Adding volume vs. concentrating volume

If an athlete has available time to increase weekly training hours, is it better to increase total weekly volume or rearrange and reconfigure runs to concentrate workload without increasing weekly hours? I don’t think it’s a binary choice as much as a progression based on circumstances and limitations. For instance, I usually rearrange workouts when the weekly volume is capped somehow (e.g., injury, schedule limitations, etc.). Then, as a second measure, I’d increase volume on the longest day. Making long days longer typically increases training stress more than accumulating those same hours in separate workouts. If that works but I need more, then I’ll seek to add overall volume (hours).

In order, my priorities are to: rearrange -> increase duration of longest day -> increase total volume.

Concentrated Volume

Volume concentration is one of the most tried and true ways to make more out of your weekly volume. The process is simple, take the normal number of miles or hours you run per week and concentrate more of the volume on a select few days. This type of training manipulation is particularly advantageous during high volume phases where you are trying to maximize your long runs. I would utilize this strategy for any athlete in the final 8 weeks of training leading into a race, either with or without an overall volume increase.

Here’s how you do it

Step one: Normalize your daily training volume. Do this by taking an average of the last four weeks of training across each day per week.

Step two: Move the volume around. Move half (or greater if you feel the need) of the volume on your two lowest-volume days and move it to the days with the highest volume.

You’ve now rearranged the same amount of weekly volume so that it’s concentrated on two days during the week.

An example of a fictitious runner’s training 9 hours per week is below.

Old Plan

New Plan

In this way, the 30 min of extra time on the longer runs will likely have a bigger impact than they would on the easier runs. You can more aggressively concentrate the volume (make the longer runs longer and the shorter runs shorter) if you are a more advanced runner.

Final note

Adding more miles and more time to your training can result in meaningful improvement. It’s the most common way endurance athletes get faster and stronger. But evenly spreading training volume across all days of the week isn’t always the best way to distribute your time and energy. Volume concentration makes your longish days longer, and there is a difference between the physical strain experienced in the final hour or a 2-hour run compared to a 3-hour run, even if both runs are completed at the same pace. So, before you simply apply more, take a hard look at what you are currently doing. Chances are, you can do more with the hours you already have.

Contains excerpts from Jason Koop’s column in Ultrarunning Magazine.

References-

Mølmen, K. S., Øfsteng, S. J., & Rønnestad, B. R. (2019). Block periodization of endurance training – a systematic review and meta-analysis. Open access journal of sports medicine, 10, 145–160. https://doi.org/10.2147/OAJSM.S180408