Okay, But What Does It Mean?
Every service, explained in real terms for parents, coaches, and junior athletes.
1. Daily Inputs
What the athlete does each day to generate accurate, science-backed performance insight.
HRV Testing with Kubios
What it is
A 3-minute daily heart rate variability (HRV) test using the Polar H10 chest strap and Kubios software.
What your athlete gets
A quick, non-invasive morning check-in that shows how well their body recovered.
Why it matters
HRV helps us understand if the body is ready to train or needs more recovery. Over time, it reveals patterns that drive smarter training and prevent burnout.
Polar H10 Chest Strap
What it is
A high-precision chest strap worn during daily HRV testing.
What your athlete gets
A personal device they own and use every day for reliable readings.
Why it matters
This is the gold standard for accurate HRV collection—far more reliable than wrist devices or smartwatches.
Johan GPS and HR Vest
What it is
A smart vest worn during tennis training to capture heart rate, movement, and workload.
What your athlete gets
Objective data about how hard they trained on court.
Why it matters
Tracking training load helps match external stress to internal readiness. It protects from overload and improves performance timing.
Wellness Ratings
What it is
Daily sliders to track sleep, fatigue, soreness, stress, and mood in the Johan app.
What your athlete gets
A simple way to self-report how they feel each day.
Why it matters
It adds emotional and psychological context to physiological signals, giving a more complete picture of readiness.
Menstrual Cycle Tracking (girls age 13+ only)
What it is
Daily or weekly logging of cycle days and symptoms to model hormonal rhythms.
What your athlete gets
Private input that helps align training with their biology.
Why it matters
Cycle phases can impact energy, strength, and risk. This ensures female athletes train smarter and recover safely.
2. Weekly and Monthly Outputs
What parents and coaches receive to guide decision-making.
Weekly PDF Insight Reports
What it is
A full report combining HRV, training load, and wellness inputs.
What your athlete gets
A clear overview of how their body is responding week by week.
Why it matters
It allows everyone, parents, coaches, athletes, to stay aligned and make informed choices together.
Recovery Insights (“Push or Rest”)
What it is
Traffic-light style guidance based on recent HRV and workload trends.
What your athlete gets
Simple signals: green (go), yellow (caution), red (recover).
Why it matters
Training with biological timing increases gains and prevents silent fatigue from building up.
Load-to-Wellness Overlay Reports (Core & Elite)
What it is
A comparison between external workload and internal recovery.
What your athlete gets
A visual report showing whether their body is handling the current training volume.
Why it matters
This helps prevent overtraining before performance drops or injury shows up.
Bi-Weekly or Weekly Insight Memos
What it is
Short written updates that interpret the data and recommend changes.
What your athlete gets
Actionable tips and adjustments every 1–2 weeks, depending on the package.
Why it matters
It keeps the program adaptive and responsive, just like the pros get.
30-Minute Strategy Session (Elite only)
What it is
A personal performance review with Daniel Alexander van Skye.
What your athlete gets
Expert coaching alignment, calendar planning, and decision support.
Why it matters
Real-time scientific guidance makes sure your athlete trains with the same care and intelligence as professionals.
3. Advanced Profiling Modules
Only in Elite or available as optional add-ons for Core athletes.
Monthly Fragility Profile™ (girls age 13+ only)
What it is
A monthly model that identifies hormonal phases when the body is more fragile.
What your athlete gets
A fragility calendar with cycle-specific training recommendations and recovery alerts.
Why it matters
Protects against injury and burnout during sensitive windows. Brings clarity and precision to female athlete support.
Physiodatalytics Glossary (A–Z)
Simple, science-based explanations for everything you see in your athlete’s report.
Adaptation
What it is
How your body gets stronger, faster, or more efficient after training.
Why it matters
Training only works if your body has time to recover and adapt. We measure this through HRV trends and load feedback.
Autonomic Instability (boys only)
What it is
A sign that your nervous system is flipping too often between stress and recovery.
Why it matters
Can mean overload, growth stress, or incomplete recovery. We map it to prevent breakdown before symptoms show.
Cycle Phase Tracking (girls only)
What it is
Tracking which phase of the menstrual cycle an athlete is in.
Why it matters
Hormones change how your body recovers, performs, and handles stress. Phase-aware planning helps prevent injury and fatigue.
Entropy
What it is
A measure of how “flexible” your heart rhythm is.
Why it matters
Low entropy = stress or rigidity. High entropy = resilience and adaptability.
External Load
What it is
How much physical stress the body experienced in a session—measured by heart rate, GPS movement, and duration.
Why it matters
Tells us what the body did, which we compare to what the body can handle.
Fatigue Flag
What it is
A signal we generate when your HRV drops too low, or when recovery is lagging behind training.
Why it matters
It warns us to back off before injury, burnout, or performance crashes.
Fragility Window (girls only, age 13+)
What it is
A time in the menstrual cycle where your body is more sensitive to stress and injury.
Why it matters
Helps us avoid overload on fragile days and protect long-term resilience.
HR (Heart Rate)
What it is
The number of beats per minute your heart is making.
Why it matters
Tracking it during training shows intensity. Tracking it at rest shows recovery status.
HRV (Heart Rate Variability)
What it is
The tiny changes in timing between your heartbeats.
Why it matters
Higher HRV = well recovered. Lower HRV = under stress. It’s one of the best ways to measure readiness.
Instability Pattern
What it is
Irregular spikes and drops in HRV over days or weeks.
Why it matters
Suggests internal stress, poor adaptation, or nervous system overload.
LF/HF Ratio
What it is
A balance score between your stress system (sympathetic) and your recovery system (parasympathetic).
Why it matters
We use it to assess balance under pressure. Big swings can signal fragility or instability.
Load-to-Wellness Overlay
What it is
A chart comparing how hard you trained to how good or bad you felt.
Why it matters
When wellness drops while training stays high, you’re heading for overload.
Menstrual Phase Risk Score (girls only, age 13+)
What it is
A rating based on where you are in your cycle and how your HRV is reacting.
Why it matters
Helps flag hormonal vulnerability windows so training can be adjusted safely.
Readiness Score
What it is
A simplified number from your morning HRV test.
Why it matters
Tells you if your system is ready to go hard, or if it needs to slow down.
Recovery Lag
What it is
When your body shows delayed recovery even after you rest.
Why it matters
It’s one of the earliest signs that you need more rest or your body is under hidden stress.
RMSSD
What it is
The specific HRV number we use to guide training day to day.
Why it matters
Fast to calculate and highly accurate. The most reliable short-term recovery marker.
SDNN
What it is
Another HRV marker that reflects overall stress over time.
Why it matters
Used more for long-term monitoring than daily adjustments.
Session RPE (Rating of Perceived Exertion)
What it is
How hard the session felt on a scale from 1 to 10.
Why it matters
Tells us how taxing the session felt, which may be different from what the data shows.
Subjective Wellness
What it is
Your own daily rating of how you feel—sleep, soreness, mood, energy.
Why it matters
Your body and brain don’t always agree. This helps us spot mismatches and tailor support.
System Complexity
What it is
A measurement of how stable or chaotic your physiological signals are.
Why it matters
Simplified signals under pressure = risk. Complex systems adapt better to stress.
TRIMP (Training Impulse)
What it is
A combined score of how intense and how long your training was, based on heart rate zones.
Why it matters
Gives a realistic view of training stress, not just minutes or steps.
Vagal Suppression
What it is
When your recovery system (vagal tone) is suppressed due to overload, poor sleep, or stress.
Why it matters
Shows up before injuries, mood drops, or overtraining. One of our early warning signs.