OPEX Pain Training: How to Use High-Intensity Conditioning
Hard conditioning gets too much credit and too little thought. If every brutal session made you fitter, more people would thrive on five-minute sufferfests.
OPEX coaches Daniel Persson and Brandon Gallagher make a sharper point: pain training has a place, but only when the athlete can express it and recover from it. Used well, it builds confidence and top-end output. Used poorly, it can wreck the rest of the week.
The difference starts with what OPEX means by "pain."
Pain Is Information, Not a Badge
Hard conditioning gets too much credit and too little thought. If every brutal session made a client fitter, most coaches would just write five minutes of all-out work and call it a day. It does not work that way, and chasing the feeling of a wrecked client is one of the fastest ways to stall a program.
That is the starting point for this week's Behind The Design. Daniel Persson and Brandon Gallagher break down the energy system OPEX calls Pain: what it is, who it is actually for, and how to use it without spending recovery you cannot get back.
Start with the model, because most coaches blur it. OPEX frames conditioning through three intentions: Gain, Sustain, and Pain.
Gain is the short, explosive, high-power side, fast force output you cannot sustain because it is over in seconds.
Sustain is the repeatable steady work that builds the aerobic base and the ability to keep going.
Pain is the non-sustainable hard effort, the gear you cannot hold once the interval ends.
Each one does a different job. Trouble starts when a coach hears the word conditioning and treats anything sweaty and breathless as the same stimulus.
The line Daniel and Brandon kept returning to reframes the whole thing: Pain is information.
A hard interval is a feeling, a distinct sensation of effort, speed, and fatigue. That feeling teaches an athlete what their top end is, how they respond when it starts to burn, and whether they can recover from the dose. Pain is useful feedback. It is not proof that the program is good, and a client crawling off the floor is not evidence of good coaching.
Which is why Pain has to sit on top of something. Brandon used a house analogy: structural balance, Gain, and Sustain are the foundation, and Pain is the roof.
Build the roof on a weak foundation and it has nowhere solid to go. Before a coach programs Pain, two checkpoints matter. First, strength. Can the athlete produce enough force to reach a true pain output at all? If someone finishes a sixty-second air bike effort and could repeat it immediately, that is not always toughness. Sometimes it means they were never strong enough to drive the bike hard enough to find that gear.
Second, skill. The modality has to let the athlete express the effort. An air bike is simple. A rower is technical. If rowing mechanics break down first, the energy system was never the limiter, and the session was measuring the wrong thing.
Audience changes the answer.
For a general client, Pain is a small tool, not the plan. It can show someone they have a gear they have never touched, and that has real value.
But most lifestyle clients are managing work, family, stress, and uneven sleep, and their training has to leave room for life. If one hard session burns the whole stress budget, tomorrow's session disappears. Worse, the client starts to believe a workout only counts if it leaves them wrecked, and that belief pushes people out of training.
For an athlete, Pain earns its place. A fighter needs to meet that burn in training, under control, not for the first time in the cage. A CrossFit competitor needs to know how to empty the tank on demand and keep moving once the pain shows up.
Progression is where the craft lives. Sustain usually moves from long to short, building a wide aerobic base and then compressing it. Pain often moves the other way: start with ten honest seconds, then stretch the interval only once the athlete proves they can express the effort and recover from it. If they cannot, the answer is never more suffering. It is better preparation. Less is more here, and Pain peaks near an event or late in a block, not all year round.
Three questions cut through most bad programming before you add a Pain session:
Does this person need Pain work right now, or are they missing more basic conditioning?
Can they express it with enough strength and skill on a simple enough modality?
Can they recover from it without costing the next session, the next week, or the rest of the block?
When the answer is unclear, do a little less. You can always add. Undoing the fatigue from a careless session is much harder.
Daniel and Brandon move through the real reasoning, not theory, including the diagnostic cues that tell you whether an athlete is actually finding their top gear. Watch the full episode above.
For the wider model behind this conversation, OPEX has an energy system training primer, and LearnRx has a class on the Gain, Sustain, and Pain framework.
Behind The Design is part of the CoachRx Podcast Network. If you want to organize session intent, review client comments, and check whether an athlete is hitting the right stimulus across exercise, nutrition, and lifestyle, you can try CoachRx free for 14 days.
For the full pathway into this kind of program design, look at the OPEX Method Mentorship.
For more programming ideas from the coaches behind this discussion, see Brandon Gallagher on Instagram and Daniel Persson on Instagram.
Connect with the coaches
Brandon Gallagher:Brandon’s Instagram (@bgperform_)
Daniel Persson:Daniel’s Instagram (@danielcapersson)
Join us live on Tuesdays mornings 11:30am EST on the OPEX YouTube Channel
Start your free 14-day CoachRx trial and bring principled programming, habit tracking, and high-touch communication all in one seamless coaching command center.

