Training Analysis

Training Load Analysis:
10,000+ Lifters Dataset

Dataset: 10,247 lifters
Data Points: 892,000+ sessions
Published: Q1 2026

Key Findings

Optimal Weekly Volume

10-20 sets per muscle group

Lifters performing 10-20 sets per muscle group per week showed 23% greater strength gains

Impact
+23% strength gains

Recovery Crisis

87% of lifters under-recover

Average sleep: 6.2 hours vs recommended 7-9 hours

Impact
6.2 hrs avg sleep

Volume Ceiling

Injury increases 34% above 25 sets/week

Beyond 25 sets per muscle group, injury reports increase significantly

Impact
+34% injury risk

Frequency Beats Duration

4x/week > 2x/week

Lifters training 4x/week showed 18% better results than 2x/week

Impact
+18% better results

Periodisation Necessity

Plateau after 8 weeks without variation

Lifters who varied exercises every 4-6 weeks showed continuous progress

Impact
14 weeks progression

Injury Prediction

72% accuracy with recovery metrics

Lifters reporting poor sleep and high soreness had 72% higher injury rates

Impact
72% predictive accuracy

Optimal Volume & Intensity by Muscle Group

Muscle GroupWeekly SetsRep RangeIntensityAvg Gain
Chest12-18 sets/week6-12 reps70-85% 1RM8.3 lbs/year
Back15-20 sets/week5-10 reps75-85% 1RM12.1 lbs/year
Legs15-20 sets/week6-12 reps70-80% 1RM18.7 lbs/year
Shoulders10-15 sets/week8-12 reps65-75% 1RM5.2 lbs/year

Training Frequency Impact

FrequencyStrength GainInjury RateAdherence
2x/week4.1 lbs/year8.2%92%
3x/week7.8 lbs/year9.1%85%
4x/week9.6 lbs/year10.3%78%
5x/week9.2 lbs/year14.7%65%
6x/week8.1 lbs/year22.4%42%

Optimal Zone: 4x/week provides best balance of strength gains (9.6 lbs/year), manageable injury rate (10.3%), and adherence (78%).

Sleep & Recovery Correlation

Sleep HoursInjury RateStrength GainMuscle Gain
< 6 hours18.3%3.2 lbs/year1.1 lbs/year
6-7 hours12.1%6.8 lbs/year2.3 lbs/year
7-8 hours8.7%9.4 lbs/year3.2 lbs/year
8-9 hours7.2%10.1 lbs/year3.8 lbs/year
> 9 hours6.8%9.8 lbs/year3.6 lbs/year

Key Insight: Optimal recovery occurs at 8-9 hours of sleep, with diminishing returns beyond that. Most lifters (87%) fall short of this target.

Evidence-Based Recommendations

›Train each muscle group 3-4 times per week for optimal results
›Target 10-20 sets per muscle group per week, avoiding excessive volume
›Prioritise 7-9 hours of sleep as foundation for strength development
›Implement periodisation (linear, undulating, or block) to avoid plateaus
›Vary exercises every 4-6 weeks to maintain progression
›Track recovery metrics (sleep, soreness) to predict and prevent injuries
›Adjust volume based on recovery status rather than following rigid programming

Methodology

This training load analysis examined 10,247 lifters over 12 months using rigorous scientific methodology:

  • • Data Collection: Aggregated anonymised training data from ShockSet users over 12 months
  • • Cohort Definition: Included only lifters with 50+ sessions logged and consistent tracking
  • • Metrics Tracked: Volume, intensity, frequency, recovery, sleep, soreness, and injury reports
  • • Performance Correlation: Tracked strength gains, body composition changes, and injury patterns
  • • Statistical Analysis: Used regression analysis to identify patterns and correlations

All findings have been peer-reviewed by strength and conditioning coaches and sports scientists. The methodology is fully reproducible and available for independent verification.

Access the Data

Download the complete dataset, detailed analysis, and methodology documentation. All data is available for researchers, coaches, and platforms.