Training science, AI and business for coaches
Insights on exercise science, coaching systems, and product updates from Kaizer.
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Latest articles
TheKaizerJournalSEP 2026
The best personal trainer software depends on where you get paid
TheKaizerJournalSEP 2026
Migrating from Trainerize to Kaizer without dropping a client on the way
TheKaizerJournalSEP 2026
Progressive overload with RIR: the arithmetic the engine does for you
TheKaizerJournalAUG 2026
How a 70-member gym left spreadsheets behind and built its online training program
Training Science13
TheKaizerJournalSEP 2026
Progressive overload with RIR: the arithmetic the engine does for you
TheKaizerJournalAUG 2026
Lengthened partials: why they grow as much as full range of motion
TheKaizerJournalJUL 2026
Strength and endurance together: how to keep them from interfering
TheKaizerJournalJUL 2026
Backing off for a week to progress: the science of the deload
TheKaizerJournalJUN 2026
Running more won't make you faster: strength training improves running economy by up to 8%
TheKaizerJournalJUN 2026
Training to failure won't build more muscle — why RIR is the smarter way to gauge effort
TheKaizerJournalJUN 2026
How Little Can You Train and Still Keep Your Muscle?
TheKaizerJournalMAY 2026
Frequency vs. volume: meta-analyses show what actually matters for growth
TheKaizerJournalMAY 2026
You can lose fat without losing muscle — if you control rate, protein and training
TheKaizerJournalAPR 2026
Training close to failure works as well as going to failure — with less fatigue
TheKaizerJournalMAR 2026
