The Rein Blog
Training, supplementation, and recovery — broken down without the bro-science. Real, evidence-based guidance to help you get more out of every session and train for the long game.
Why Is There Sodium in Your Pre-Workout? Sweat, Hydration & Output (2026)
Most pre-workouts skip sodium. Here's why the electrolyte you lose fastest in sweat belongs in your scoop — and what it does once you're under the bar.
Does the Mind-Muscle Connection Actually Work? What the Research Says (2026)
"Squeeze the muscle" isn't broscience — but it only works under certain loads. Here's when internal focus builds muscle, when it costs you, and how to cue it.
Do You Need to Cycle Your Pre-Workout? (2026)
Cycling off your whole pre-workout throws away the ingredients that finally started working. Only one of them builds real tolerance — here's which.
Betaine Anhydrous: What 3g Actually Does for Power Output (2026)
Most pre-workouts skip betaine or dust it. Here's what 3,000 mg actually does for force output, work capacity, and why the dose has to be real.
How Late Can You Take Pre-Workout? Caffeine, Sleep & Evening Training (2026)
Training at 7 p.m.? Your pre-workout is still in your system at bedtime. Here's the honest caffeine cutoff — and how to train late without wrecking recovery.
How Long Should You Rest Between Sets? (2026)
Resting longer isn't lazy — it's often what makes the set count. Here's how long to rest between sets, by goal and by lift, and what the research shows.
How Long Before a Workout Should You Take Pre-Workout? (2026)
Timing your pre-workout wrong quietly wastes it. Here's exactly how long before training to take it — and why ~20 minutes lines up with the science.
Beta-Alanine and the Tingles: What 4g Actually Does (2026)
That tingle after your pre-workout is beta-alanine — and it's harmless. Here's what 4g actually does, why it works over weeks, and how to dose it.
Clean Energy vs. Jittery Energy: What Actually Causes the Difference (2026)
Clean energy comes from smart formulation, not more caffeine. Here's what actually separates smooth focus from the jitters and crash.
What Actually Causes a Muscle Pump? The Science of the Pump (2026)
A muscle pump is trapped blood in a working muscle. Here's the real science behind it — and how to train and dose for a bigger one.
How to Read a Pre-Workout Label Like a Formulator (2026)
Learn to read a pre-workout label like a formulator: spot proprietary blends, clinical doses, and under-dosed actives before you buy.
Why 10g of L-Citrulline Is the Pump Standard (And Why 6g Isn't Enough) in 2026
Most pre-workouts under-dose citrulline. Here's why 10g of pure L-Citrulline is the real clinical standard for pumps — and how to spot the label tricks.
How Much L-Citrulline Do You Need for a Real Pump? (2026)
Most pre-workouts under-dose citrulline. Here's how much L-citrulline you actually need for a real pump — and why the form and dose both matter.