A medium-level high jumper trains with barbells for three months, then switches to depth jumps for another three months. His absolute strength skyrockets by 60 kilos, and his vertical jump shoots up 30 centimeters.
A second high jumper follows the exact same program—same exercises, same volume—but reverses the order. After six months, he’s actually worse than when he started.
A third athlete does both exercises simultaneously for six months. He improves initially, but then stalls and regresses.
Same work. Different sequences. Wildly different outcomes. This isn’t speculation—it’s published Soviet research from legendary coach Yuri Verkhoshansky’s lab, documented on page 354 of Supertraining. And it reveals one of the most powerful—yet misunderstood—training principles in sports science.
Jump to:
- The Long-Term Delayed Training Effect: What Most Coaches Get Wrong
- Why Spreading Volume Evenly Keeps Athletes Stuck
- Rule #1: Concentration Must Be Extreme and Single-Purpose
- Rule #2: The Bigger the Dip, the Higher the Rise (Within Limits)
- Rule #3: Volume Triggers LTDE, Not Intensity
- Rule #4: Progressive Intensification Must Follow Concentrated Loading
- Rule #5: Loading Duration Equals Expression Window
- Why Block Periodization Fails for Most Coaches
- Implementing LTDE: Practical Takeaways
The Long-Term Delayed Training Effect: What Most Coaches Get Wrong
John Evans, a strength coach obsessed with vertical jump performance, has spent over a decade studying Verkhoshansky’s work. What he’s discovered might change how you think about training progression entirely.
If there were only five things that you wanted to understand about what the Russians did with their athletes, it would be these rules.
Verkhoshansky discovered something counterintuitive: concentrated loading creates a performance dip that’s actually the mechanism for breakthrough gains. He called this the Long-Term Delayed Training Effect (LTDE).
If you want something simple that actually works, this is one of the most effective tools I’ve used to build strength, conditioning, and endurance without needing a full gym setup.
- Full-body training with one weight using swings, squats, and presses
- Solid cast iron build that feels stable and lasts for years
- Comfortable grip that makes high-rep workouts easier to handle
Here’s how it works. When you concentrate massive strength volume into 4-12 weeks, three things happen in sequence:
- Speed-strength qualities decrease—verticals drop, sprint times slow, power output falls
- When you reduce strength volume and replace it with speed work at gradually increasing intensities, those qualities rebound higher than baseline
- These elevated performance levels hold for weeks or months
The dip isn’t a side effect. It’s the entire point.
The lower speed strength levels fall during the concentration of strength loading stage, the higher they rise in the subsequent LDTE phase.
Why Spreading Volume Evenly Keeps Athletes Stuck
Most coaches distribute training loads evenly across the year, believing consistency equals progress. Verkhoshansky argued this approach is fundamentally insufficient for advanced athletes.
When training remains constant week after week, the body adapts initially, then stops responding. The stimulus becomes monotonous. Adaptive potential decays.
The training potential of the means employed decreases as the special work capacity increases.
For elite athletes to keep improving, you must disrupt homeostasis dramatically enough to force a genuine response. Concentrated loading accomplishes exactly that—but only when executed according to specific rules.
Rule #1: Concentration Must Be Extreme and Single-Purpose
Verkhoshansky was precise about what qualifies as “concentrated.” Loading becomes concentrated when volume in a single month equals 23-25% of annual volume for that training quality.
If you want something simple that actually works, this is one of the most effective tools I’ve used to build strength, conditioning, and endurance without needing a full gym setup.
- Full-body training with one weight using swings, squats, and presses
- Solid cast iron build that feels stable and lasts for years
- Comfortable grip that makes high-rep workouts easier to handle
If your yearly squat volume totals 400 tons, you need 100 tons compressed into one month. The remaining 300 tons spread across the other 11 months.
This isn’t about adding sessions—it’s about compressing volume into a brief window. And critically, that concentration must be unidirectional.
Complex training with its multifaceted influence on the body cannot create the conditions necessary for producing highly specific physical preparedness.
If you’re concentrating on strength, technical work, speed work, and endurance work take a back seat. Trying to improve multiple qualities simultaneously prevents the concentrated stimulus from triggering LTDE.
Without proper concentration, you won’t create enough disruption. Advanced athletes won’t respond, and performance stagnates.
Rule #2: The Bigger the Dip, the Higher the Rise (Within Limits)
Verkhoshansky documented three response patterns to concentrated loading:
- Small dip: Minor performance decrease followed by modest improvement
- Moderate dip: Significant performance drop followed by substantial gains
- Excessive dip: Massive performance crash with no recovery—athlete stalls or regresses
The sweet spot exists between pushing hard enough to trigger adaptation but not so hard that stress overwhelms recovery capacity.
If you want something simple that actually works, this is one of the most effective tools I’ve used to build strength, conditioning, and endurance without needing a full gym setup.
- Full-body training with one weight using swings, squats, and presses
- Solid cast iron build that feels stable and lasts for years
- Comfortable grip that makes high-rep workouts easier to handle
The appearance of the long-term delayed training effect has an independent character and to a significant degree depends on the ability of the athlete to withstand volume loads and the ability of his or her body for recovery.
This is where coaching becomes art. Three athletes at identical skill levels receiving identical training can produce three entirely different responses.
Evans lives with his best athletes specifically to monitor daily readiness. If A-skips look flat or marches appear lethargic, he adjusts immediately—cutting volume for one athlete while pushing another harder based on recovery signals.
You’re walking a tightrope. Too much volume creates maladaptation. Too little fails to trigger LTDE. Hit the sweet spot, and performance explodes.
Rule #3: Volume Triggers LTDE, Not Intensity
Concentrated loading requires high volume at moderate intensity—not maximal effort lifts. Verkhoshansky was explicit about this.
When using concentrated loads oriented to achieving the long-term delayed training effect, the methods used should not be extremely intense. Concentration in one of the single-purpose loads is already intensification of the training effect.
Think six sets of ten at 70%, not ten sets of one at 100%. Cramming 25% of annual volume into one month already imposes massive systemic stress. Adding maximal lifts pushes athletes beyond recovery thresholds.
Verkhoshansky’s specific squat protocol for concentrated phases:
If you want something simple that actually works, this is one of the most effective tools I’ve used to build strength, conditioning, and endurance without needing a full gym setup.
- Full-body training with one weight using swings, squats, and presses
- Solid cast iron build that feels stable and lasts for years
- Comfortable grip that makes high-rep workouts easier to handle
- 70% for 10 reps
- 80% for 10 reps
- 85% for 7 reps
- 90% for 4 reps
- Repeat wave 2-3 times
Brutal sessions—but never pushing to true 100% capacity. Athletes adapt to the volume, making their “90%” feel more like 85% after several weeks.
Intensification happens after the volume block through sharper technique, faster bar speeds, and explosive movements as volume decreases.
Rule #4: Progressive Intensification Must Follow Concentrated Loading
After eight weeks of crushing squat volume, you’re stronger—but also beaten up. Your vertical is likely depressed. The solution isn’t immediately jumping into max-effort work.
The realization of the LTDE of concentrated loads is served by moderate increases in work volume and gradually increasing intensity.
Week one post-loading might involve submaximal upright running. Week two builds to slightly faster running. Week three introduces max approach jumping. Week four unleashes all-out efforts.
This gradual ramp unlocks LTDE. You’ve triggered the adaptation—now you must express it progressively through specific training at gradually increasing intensities.
Critically, volume must stay low during this phase. Your body is hypersensitive after concentrated loading. Even appropriate volumes will disrupt the response if introduced too early.
If you want something simple that actually works, this is one of the most effective tools I’ve used to build strength, conditioning, and endurance without needing a full gym setup.
- Full-body training with one weight using swings, squats, and presses
- Solid cast iron build that feels stable and lasts for years
- Comfortable grip that makes high-rep workouts easier to handle
Verkhoshansky documented a triple jumper who violated this rule. After concentrated loading in March-April, the athlete improved slightly in May. Wanting to maintain strength, the coach added small amounts of strength volume back in.
This led to a fast decrease in speed, strength, and sports results. As a result of this, the athlete lost his chance to be selected in the qualifying competitions for a place on the national team.
Just a few percentage points of strength volume detonated the entire LTDE during the most critical competition window.
Rule #5: Loading Duration Equals Expression Window
The final rule is elegantly simple: the duration of your performance rise equals the duration of concentrated loading.
Load for eight weeks, get eight weeks of elevated performance. Load for six weeks, get six weeks. Load for twelve weeks, get twelve weeks.
Verkhoshansky found this range typically fell between 4-12 weeks for elite athletes. Shorter durations weren’t concentrated enough. Longer periods caused excessive degradation without recovery.
This makes loading duration a strategic decision based on competition schedule. One major competition might warrant twelve weeks loading and twelve weeks expression. Multiple back-to-back competitions require shorter loading cycles with sharper, more frequent peaks.
If you want something simple that actually works, this is one of the most effective tools I’ve used to build strength, conditioning, and endurance without needing a full gym setup.
- Full-body training with one weight using swings, squats, and presses
- Solid cast iron build that feels stable and lasts for years
- Comfortable grip that makes high-rep workouts easier to handle
Verkhoshansky used bi-annual peaking specifically because this timing aligned perfectly with major competitions. His second peak was consistently higher than the first because it compounded adaptations from the previous cycle.
Why Block Periodization Fails for Most Coaches
The experiment with three high jumpers demonstrates why sequence matters more than volume. When coaches implement block periodization without understanding these five rules, they wonder why it doesn’t work.
Common mistakes include:
- Distributing volume evenly instead of concentrating it
- Training multiple qualities simultaneously during concentrated blocks
- Adding intensity to volume phases, pushing athletes into overtraining
- Ramping specific work too quickly post-loading
- Reintroducing strength volume during the expression window
Each rule functions as a failsafe. Violate one, and LTDE disappears. Follow all five, and you unlock breakthrough performances previously thought impossible.
The athlete who did depth jumps first then strength work? He violated the sequence rule—technical work degraded before developing the strength foundation needed to express it.
The athlete who did both simultaneously? He violated the concentration rule—training too many qualities prevented sufficient disruption to trigger LTDE.
If you want something simple that actually works, this is one of the most effective tools I’ve used to build strength, conditioning, and endurance without needing a full gym setup.
- Full-body training with one weight using swings, squats, and presses
- Solid cast iron build that feels stable and lasts for years
- Comfortable grip that makes high-rep workouts easier to handle
Only the athlete who followed proper sequencing—concentrated strength loading followed by progressive intensification of specific work—saw dramatic improvement.
Implementing LTDE: Practical Takeaways
Verkhoshansky’s system isn’t guesswork—it’s precise methodology refined through decades of elite coaching. Understanding these principles separates coaches who randomly assign programs from those who engineer performance breakthroughs.
Calculate annual volume for your primary strength quality. Determine 23-25% of that total. Compress it into one month of training.
Focus exclusively on that quality during loading. Technical work, speed development, and other qualities take minimal roles during this phase.
Monitor individual response carefully. Watch for the sweet spot between insufficient stimulus and excessive stress.
Keep intensity moderate during concentrated phases. Volume creates the disruption—maximal efforts aren’t necessary and often counterproductive.
If you want something simple that actually works, this is one of the most effective tools I’ve used to build strength, conditioning, and endurance without needing a full gym setup.
- Full-body training with one weight using swings, squats, and presses
- Solid cast iron build that feels stable and lasts for years
- Comfortable grip that makes high-rep workouts easier to handle
Plan gradual intensification post-loading. Low volume, progressively specific work at increasing intensities unlocks the adaptation you’ve triggered.
Time your loading to competition schedules. Your expression window duration matches loading duration—plan accordingly.
The Long-Term Delayed Training Effect isn’t magic. It’s applied stress-adaptation biology executed with surgical precision. Master these five rules, and you’ll understand why Soviet sports science dominated international competition for decades—and why most Western coaches still struggle to replicate their results.
