Feature
Track Training Load Intelligently — No Hardware Required
KAIZEA automatically calculates your players' Load Index from daily RPE inputs. You instantly see who is overloaded — and can respond before injuries occur.
The problem
Why is training load so hard to manage today?
Because coaches either sink time into spreadsheets, invest in expensive GPS hardware — or rely on gut feeling alone. All three paths leave overload invisible until it becomes an injury.
Spreadsheet upkeep eats your evenings
Copying load figures from training plans into spreadsheets by hand, maintaining formulas, hunting for errors — a second part-time job for a volunteer coach.
GPS hardware means work before every session
Handing out vests, charging, calibrating, downloading and exporting after training — effort an amateur club has to shoulder week after week.
The myth: more training = better performance
Without systematic management, every extra session looks like progress — until load tips over and performance drops instead of rising.
Overload stays invisible — until the injury
Without ongoing measurement, a critical load spike usually only shows up once the player is already injured on the bench.
How it works
How does KAIZEA calculate the Load Index?
KAIZEA combines attendance and session-RPE — perceived exertion (1–10) × session duration in minutes — automatically into a Load Index per player, optionally enriched with wearable data. It's grounded in the Acute:Chronic Workload Ratio (ACWR): the ratio of the load of the last 0 days (acute) to the average of the last 0 days (chronic). Input takes only 0 seconds per player, per session.
- Sweet spot 0.8–1.3: lowest injury risk — above it, risk climbs significantly (Gabbett, British Journal of Sports Medicine, 2016)
- A weekly load increase under 10% measurably lowers injury risk (Gabbett, 2016)
- The training-injury prevention paradox: high but progressively built chronic load tends to protect against injury more than sudden spikes (Gabbett, 2016)
- Session-RPE is a validated, hardware-free measurement method (Foster et al., Journal of Strength and Conditioning Research, 2001)
The four traffic-light zones
- < 0.8 — underload
- 0.8–1.3 — optimal zone
- 1.3–1.5 — caution
- > 1.5 — elevated risk
Thresholds can be adjusted per team.
Load traffic light
Team · as of today
- train fully
- reduce load
- rest
Team load · last 7 days
Team load trend across the last 7 days
Comparison
RPE or GPS — what fits your club?
RPE-based tracking delivers comparably reliable values for load management as GPS systems, per Foster et al. (2001) — just without the hardware, maintenance, and setup effort.
| Criterion | RPE (KAIZEA) | GPS systems |
|---|---|---|
| Input per session | 10 seconds on a smartphone | Hand out vests, calibrate, download |
| Upfront cost | No purchase required | Hardware investment per player |
| Ongoing effort | No charging, no export | Charge cycles, maintenance, data export per session |
| Validation | Foster et al., JSCR (2001) | Position data, no perceived exertion captured |
| Ready to use | Instantly, on any smartphone | Only after purchase and setup |
The two approaches aren't mutually exclusive: KAIZEA starts completely hardware-free via RPE and grows with your club — GPS data can be optionally connected later.
Scalable
How does the Load Index grow with your club?
KAIZEA starts completely hardware-free via RPE — that's enough for the full load traffic light. When your club upgrades later, more data sources connect on top, without replacing the core or losing history.
Manual — RPE + duration
Players enter their perceived exertion (1–10) after each session; KAIZEA automatically combines it with session duration into session-RPE. Enough for the complete load traffic light.
+ Wellness check-in (readiness)
The daily wellness check-in adds a readiness view to the Load Index — early warning signs often show up before the traffic light itself changes.
+ Heart-rate strap
Heart-rate data refines load measurement with an objective physiological value, without replacing RPE.
+ GPS
GPS data adds positional and running metrics for clubs that have already invested in hardware — the Load Index stays the shared foundation across every tier.
Trust & science
How reliable is the Load Index — even for youth players?
Reliable, because KAIZEA calculates with youth-adjusted time constants instead of applying pro formulas unchanged to children — and because every reading is labelled as either validated research or coaching experience.
Youth-adjusted calculation
Young players recover differently and tolerate different load profiles than adults. KAIZEA therefore calculates with youth-adjusted time constants. Values based on published research (Gabbett, British Journal of Sports Medicine, 2016; Foster et al., Journal of Strength and Conditioning Research, 2001) are labelled as such; where a reading instead rests on coaching experience, KAIZEA shows it as guidance, not as a validated measurement.
What the coach sees in the dashboard
-
Traffic light per player
Colour-coded load zone at a glance — green, amber, red.
-
7/28-day trend
Sparkline over acute and chronic load, viewable at any time.
-
Automatic flagging
At-risk players are flagged automatically — no manual spreadsheet analysis.
-
AI recommendation for the next session
Training suggestion tailored to the team's current load; the coach makes the final call.
Frequently asked questions
What is training load management?
Training load management is the systematic planning and monitoring of an athlete's training load (intensity × volume). The goal is to keep athletes in the optimal zone between underload and overload — maximising performance gains while minimising injury risk.
Do I need GPS trackers for training load monitoring?
No. KAIZEA uses RPE (Rating of Perceived Exertion) — a scientifically validated self-assessment method. Players rate their perceived effort after each session on a scale. This is just as predictive as GPS data, but requires no hardware.
What is the Load Index and how does KAIZEA calculate it?
The Load Index combines attendance and session-RPE (perceived exertion) — optionally enriched with wearable data — into one value per player. It's grounded in the Acute:Chronic Workload Ratio: the load of the last 7 days measured against the average of the last 28 days (Gabbett, British Journal of Sports Medicine, 2016). KAIZEA calculates it automatically from the RPE data of every session and displays the result on the load traffic light.
What happens when a player reaches a critical load zone?
KAIZEA automatically flags at-risk players in the dashboard and can send push notifications. The coach sees at a glance which players need reduced load — no manual spreadsheet analysis required.
Can I add wellness check-ins, a heart-rate strap or GPS later?
Yes. KAIZEA starts completely hardware-free via RPE — that stays the core and is entirely enough for the load traffic light. When your club upgrades later, you can optionally connect wellness check-in, heart-rate or GPS data: it refines the Load Index but does not replace it. So you pay nothing for hardware at the start, and the platform grows with you — without losing any data or history.
More: ACWR fundamentals · Wellness monitoring · AI briefings
Last updated: July 2026
The next step
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