The 5 Most Common Mistakes When Planning Explosive Strength Training (and How to Avoid Them)

Introduction

Many strength training mistakes happen at the moment of planning or methodologically programming that training.

Planning is the coach’s invisible work, and it’s one of the areas where the difference between a good coach and an average one shows the most.

Here are the 5 most frequent mistakes we see in strength programming, and how to avoid them.

Mistake #1: Programming Without Assessing First

This is the most common and most costly mistake. Building a plan without knowing the athlete’s real level is like prescribing medication without a diagnosis.

Most coaches start with an “assessment” session that consists of asking the athlete how they feel and doing a few trial exercises. That’s not enough.

A real assessment includes an initial intake, injury history, evaluating basic movement patterns, and including exercises that provide information about the athlete’s specific capacities, such as:

• ✓Jump tests to estimate the strength of the muscular contractile component and the elastic contribution rate (CMJ, SJ)
• ✓Tests to measure reactivity and tendon stiffness (DJ, hops, etc.)
• ✓Assessment of asymmetries between limbs
• ✓Upper-body explosive strength tests

Without this data, any plan is a bet. With it, it’s a science-based prescription.

Tools like the Nexo Jump platform let you run these tests in minutes, with data automatically saved to the cloud and synced with the planning software. There’s no excuse to program without data.

Mistake #2: Ignoring Load Undulation

Our body doesn’t adapt linearly: at first, a person can improve doing the same thing over and over, but in the long run we need to undulate training loads to keep improving.

Load undulation is the systematic variation of training variables, mainly volume and intensity, and it’s one of the best-supported principles in training science.

A well-undulated plan alternates:

• ✓High-intensity, low-volume days (e.g., max strength training)
• ✓Moderate-intensity, medium-volume days (e.g., hypertrophy or power training depending on execution velocity)
• ✓Low-intensity, high-volume days (e.g., metabolically oriented training)
• ✓Planned deload weeks every 3-4 weeks or before competitions

Configuring this manually in Excel is tedious and takes a lot of time. In Nexo Kinetics, undulation can be programmed directly into the plan, with automatic load and volume calculations for each session.

Mistake #3: Not Managing Fatigue in Real Time

A plan can be perfectly designed on paper and still fail to account for the athlete’s pre-existing fatigue.

The problem is that fatigue is invisible until it turns into injury or stagnation. By the time the athlete says “I feel tired,” they’ve usually been accumulating excess fatigue for weeks.

The early overtraining signals you should be monitoring:

• ✓Performance drops in repeated jump tests (more than 5-8% below baseline)
• ✓Increased rating of perceived exertion at the same load
• ✓Deterioration in sleep, mood, or motivation reported by the athlete
• ✓Asymmetries increasing between tests

Nexo Kinetics’ daily wellness questionnaires capture these signals before each session. That way, the coach can see the evolution of the athlete’s fatigue in real time and adjust the day’s load if necessary, with the goal of prescribing the optimal load for that athlete on that day.

Mistake #4: Using the Same Exercises for Everyone

The exercises an athlete should perform, and the training load they need to assimilate, derive from the metrics that indicate their state of fitness.

Concrete examples:

• ✓An athlete with a reactive strength deficit (low RSI) needs to build their strength base and do low-intensity stiffness work before adding high-intensity plyometrics
• ✓An athlete with a significant asymmetry between legs needs corrective unilateral exercises before increasing bilateral loads
• ✓An athlete with a high CMJ/SJ ratio already has good elastic reutilization: they need to develop their strength base, not more plyometric work

The Nexo Kinetics exercise library, with more than 400 movements with video, is organized so you can select exercises by category, muscle group, and desired adaptation. You can also upload your own exercises with video from your phone, building your personalized library.

Mistake #5: Not Measuring Progress With Objective Data

The last mistake, and one of the most expensive in terms of client retention, is not having a system to demonstrate that the training is working.

“You look better” isn’t enough. Athletes need to see their progress, especially at times when they don’t perceive it subjectively. And coaches need data to know whether the plan is producing the expected results or needs adjusting.

A progress measurement system must include:

• ✓Reference tests at the start and end of each block (CMJ, SJ, DJ)
• ✓Performance logging in every session (loads, sets, reps)
• ✓Graphical visualization of evolution over time

In Nexo Kinetics, the athlete can see their progress directly from the app: evolution charts for jumping, strength, and wellness. That visualization doesn’t just inform the coach, it also motivates the athlete to keep training and drastically reduces dropout rates.

The Common Pattern Behind the 5 Mistakes

If you look at the five mistakes together, there’s a clear pattern: they all come from programming without enough data or without a system to process it.

It’s not a lack of knowledge: most coaches know they should assess, manage fatigue, and measure progress. The problem is that without the right tools, doing it well takes too much time.

That’s exactly the problem Nexo Kinetics solves: it puts data at the center of the workflow, so assessment, programming, and monitoring become a single integrated process, not three separate tasks.