Sources
JLD links each supported rule to its research source and records the strength and limits of that evidence.
Context
App conventions decide how to handle missing effort, unusual weeks, equipment increments and other real logging conditions.
Choice
Nutrition and training changes are proposed for review rather than silently rewriting your targets or plan.
Three examples from the source library
Weight-loss pace in elite athletes
A randomized trial in 24 elite athletes compared slower and faster weekly weight-loss rates during resistance training. It informs how JLD treats the pace of a weight-loss trend.
Rest intervals in trained men
A study in 21 resistance-trained young men compared 1-minute and 3-minute rest intervals over 8 weeks. It informs how rest can affect strength and muscle outcomes.
Training volume in trained men
A study in 34 resistance-trained men compared low, moderate and high set volumes over 8 weeks. It informs the relationship between training volume and adaptation.
These studies inform individual rules. They did not test JLD as an integrated product, and they do not guarantee an individual result. JLD provides fitness information, not medical advice.