Know your squad's ACWR before every session.
Fractall calculates the acute:chronic workload ratio for every athlete automatically - from session RPE, no GPS required. Red flags appear on your dashboard before the next session. Stop injury before it happens.
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Trusted by 65+ coaches across 30+ clubs
Trusted by clubs across Europe and Africa
What does ACWR actually tell you?
ACWR divides the last 7 days of training load (acute) by the 4-week rolling average (chronic). The result tells you how hard your athletes are training relative to what their bodies are prepared for.
< 0.8
Undertraining
Acute load is too low relative to fitness base. The athlete is deconditioned - risk of re-injury when load increases suddenly.
0.8 - 1.3
Sweet spot
Optimal training zone. Acute load is building fitness without exceeding recovery capacity. Target for most training weeks.
1.3 - 1.5
Caution zone
Load is running ahead of fitness base. Monitor closely, adjust session intensity or volume, and check wellness data.
> 1.5
Danger zone
Research links this range to a significant spike in injury risk (Gabbett, 2016). Reduce load or rest the athlete immediately.
Based on Gabbett TJ (2016). The training-injury prevention paradox. British Journal of Sports Medicine.
Sound familiar?
Most coaches know ACWR matters. Few have a reliable way to track it.
You're calculating it by hand
ACWR requires 28 days of rolling load data per athlete, recalculated after every session. Most coaches either skip it entirely or maintain a spreadsheet that takes hours to maintain.
You find out after the injury
Without a live ACWR view, overload is invisible until the athlete breaks down. The spike was there. You just couldn't see it.
Enterprise platforms are unaffordable
The tools that automate ACWR well charge EUR200-500/month. Most clubs your size go without - and absorb the injury costs instead.
How it works
Setup in under 15 minutes. ACWR data from your first session.
Schedule your sessions
Set session duration, type, and participants. Recurring sessions take 30 seconds to configure. Athletes are notified automatically.
Athletes submit RPE in 30 seconds
After each session, athletes rate their effort (1-10) via push notification. Session load is calculated as RPE x duration (sRPE method, Foster 1998).
ACWR appears automatically - no formulas
Fractall recalculates each athlete's acute load, chronic load, and ACWR after every session. Red flags appear before the next training starts.
Track load trends over time
See how each athlete's workload has evolved across weeks and training blocks. Spot the pattern before it becomes a problem.
See it in action
ACWR for your whole squad - live, after every session.
Everything you need to manage load safely
ACWR calculated after every session
Acute load, chronic load, and ratio - recalculated automatically as athletes submit RPE. No formulas, no pivot tables.
Red flags before the next training
When ACWR crosses dangerous thresholds, your dashboard shows it. Intervene with data before the session starts.
Monotony and strain metrics included
ACWR alone doesn't catch everything. Fractall also calculates training monotony and strain.
Load trend charts per athlete
Visualize how acute and chronic workload have evolved over time. Spot the spike coming before it arrives.
Wellness gives context to every load spike
An ACWR of 1.4 means something different for a rested athlete vs. one who has poor sleep for days.
No hardware. Validated science.
sRPE-based internal load (Foster 1998) is a practical and proven approach for ACWR in team sports.
ACWR works alongside wellness tracking for a complete picture. See it live on the Fractall coach dashboard ->
What coaches say
“For years, I asked for a better way to manage performance. Now, this platform saves me hours every week.”
Guy Sauce
Head of Performance · Sport Clube Beira-Mar
“Before training, it is immediately clear which players need to be managed differently that day.”
Jose Dias
S&C Coach · Sport Clube Beira-Mar
“Understanding how athletes perceive workload is crucial when adjusting training stimuli to readiness state.”
Telmo Antonio
S&C Coach · JuveForce ADC
All testimonials used with permission.
Professional load management. Fair pricing.
Enterprise tools charge EUR200-500/month. Fractall starts at EUR12.50.
Per team - Annual billing
EUR15/month billed monthly - Less than EUR0.50/day per team
- ✓Unlimited athletes per team
- ✓Unlimited coaches and staff
- ✓ACWR calculated automatically
- ✓Monotony and strain metrics
- ✓Training load trend charts
- ✓Automatic red-flag alerts
- ✓Wellness and RPE surveys
- ✓Body pain mapping
- ✓PDF report export
- ✓4-week free trial
- ✓No credit card required
Multi-team discounts available - See full pricing ->
Common questions
What is the Acute:Chronic Workload Ratio (ACWR)?+
ACWR divides acute workload (last 7 days) by chronic workload (4-week rolling average). Research (Gabbett, 2016) identifies 0.8-1.3 as the sweet spot, while values above 1.5 are associated with significantly higher injury risk.
Do I need GPS or wearables to calculate ACWR?+
No. Fractall uses internal training load - session RPE multiplied by session duration (sRPE method, Foster 1998). Athletes submit effort in the mobile app and ACWR is calculated automatically.
What is a dangerous ACWR level?+
An ACWR above 1.5 is associated with elevated injury risk. An ACWR below 0.8 can indicate undertraining relative to fitness base.
What is training monotony and why does it matter?+
Training monotony measures day-to-day variation in training load. High monotony can raise injury and illness risk independently of ACWR.
Can I monitor ACWR for multiple teams?+
Yes. Fractall is team-count based - add as many teams as you manage and view ACWR for each squad from a single dashboard.
How long does setup take?+
Most clubs are fully set up in under 15 minutes. Create your team, invite athletes, and they can start submitting RPE the same day.
Prefer to read this in Portuguese? Dashboard ACWR e Monitorizacao de Carga ->
Your squad's ACWR. Visible after every session.
Join 350+ athletes monitoring load with Fractall. Your first 4 weeks are free - no credit card, no hardware, no setup call.
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